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valic000
Netherlands
Приєднався 3 вер 2010
Jena inline twin 2x2 ccm
A warm welcome to all of you out there!!
I am very sorry for let you down with new videos, but I have just so little time....and make a clip like this take a LOT hours to make it..
I had a lot videos and pictures already made, but editing a video was in this case far more than a half day...
But as promised..here it is! The Jena twin story! This was a project made some years back..and I had a lot video and pics in my PC..just time for the editing was never found...well ...here it is finally! Enjoy!
I want always to have one, from the moment I have seen it on the cover of the book...but so hard to find, so I thought..well, lets see if we can make one from two engines....and even run it, if lucky!..
There were quite some challenges...but I got long time ago on FB some great help with pictures of the central part of an genuine engine..not all details...but at least something to work with...
Well, from one thing came the other..and after some months, it was done. I am very surprised, with the power this "thing" has. The prop in the run is a 10x5 . So imagine a smaller prop. Once are adjustments fine, it is a easy starter and smooth runner!! The Jena twin was also build as a 2,5 glow. Not sure if also as a diesel..The shaft is pretty strong on my engine,it could hold on with 2x2,5 cc...
I am very sorry for let you down with new videos, but I have just so little time....and make a clip like this take a LOT hours to make it..
I had a lot videos and pictures already made, but editing a video was in this case far more than a half day...
But as promised..here it is! The Jena twin story! This was a project made some years back..and I had a lot video and pics in my PC..just time for the editing was never found...well ...here it is finally! Enjoy!
I want always to have one, from the moment I have seen it on the cover of the book...but so hard to find, so I thought..well, lets see if we can make one from two engines....and even run it, if lucky!..
There were quite some challenges...but I got long time ago on FB some great help with pictures of the central part of an genuine engine..not all details...but at least something to work with...
Well, from one thing came the other..and after some months, it was done. I am very surprised, with the power this "thing" has. The prop in the run is a 10x5 . So imagine a smaller prop. Once are adjustments fine, it is a easy starter and smooth runner!! The Jena twin was also build as a 2,5 glow. Not sure if also as a diesel..The shaft is pretty strong on my engine,it could hold on with 2x2,5 cc...
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Відео
Veenhoven Typhoon model engines, made in the Netherlands, Amsterdam
Переглядів 3,4 тис.4 роки тому
A warm welcome my dear friends! I am sorry that I release so few videos, but I simply don't have the time to edit them. But from time to time..and special in these hard times, I feel, I need to make one, to cheer you up a bit! One more will be made soon..but that is a secret so far. Amsterdam is very near by from my home..about 20 minutes with the car or train ,and I live in a small town named ...
German RGU 2,5 model diesel from 1950 ...another model diesel rebuild project..
Переглядів 1,6 тис.4 роки тому
Update.. UA-cam is censoring me.. because of the picture of GRETA....All comments removed!! Thanks UA-cam !! ;-( I thought this will not happen.. but as you see.. YT is political biased and manipulating, what THEY agree on....Shame on you..YT ! Sorry for had no new videos, but just don't had the time, far to much work with too many things...but as Adrian posted the RGU on his latest edition, so...
Byra competition 2.5cc from 1955
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Another spanish Ikon from Spain..the BYRA 2.5 !! It was a popular engine in its days. The regular 2,5 cc had a plain head....the "black head Competition" had a slightly bigger ventury to boost performance. And for sure a not bad runer with useful rpm. Its another engine I rebuild for my friend Adrian Duncan .. How ever,it had some issues... Make a new piston,as the heat up trick dont work with ...
ELIZALDE story, a rare team race diesel, 2,5ccm
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Hola amigos, Today we go back to sunny Spain! This video is dedicated to my special friend Jesus Ortega Delgado. A engine,I never hear or seen before...as most of you I think also... A lot nice engines were build in Spain in the past.Thanks to my good amigos Jesus and Jose and there friends, I could ad some beautyful engines to my collection.. Muchas gracias amigos.. ZOM and Parres and BYRA are...
WAF 1 model diesel engine ,1953
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Here we have another rebuild for Adrian. The pretty rare and lovely German WAF 1 with 1ccm capacity. Today the WAF 1 is not easy to find.I saw it on Ebay only a few times.It was produced in larger numbers,but there are no numbers. Sold till at least 1963..and thats still 56 years back in time...almost as me!! The engine is rebuilded from 2 bad engines..one had a welded carter and broken shaft,t...
Jaskoka II 2.5ccm, 1961.. A full new rebuild story for Adrian.
Переглядів 5 тис.5 років тому
Welcome again to a new edition on my smokey Diesel channel... ;-D Today we look at a EXTRA long edition of rebuilding Adrians Duncan beautyfull Jaskolka MK II 2.5.!! The name Jaskolka stands for " Swallow". It was a major overhaul, and the engine was in pretty sad condition,whan Marcin,my good friend in Poland find it...But as it a pretty hard to get engine..we grab our chance!! I had already o...
MOKI TR8 ,year 1974 ..another resurection story....from a sad bone engine.
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I was too bussy with a lot things,so there was not a lot time to make any new clips...even I have a lot new material on my PC....Some REALLY RARE engines! So I thought..I should drop at least one..here you go.... It is a rebuild for a another great guy I meet online..and as most of you,I never meet you guys.. ...but soon..I will get a visit from Poland!...and Poland have also some VERY nice eng...
Kens FROG 100 MK 1 Diesel ,1947 Sr. 6913
Переглядів 2,6 тис.5 років тому
Welcome back to "Diesel mania" A short "Sunday afternoon" run of a lovely type one (thin flange) Frog 100. Serial number 6913,so a pretty early type. It leaked at the fuel tank (Alu back plate) and also piston and CP were not sealing at all. The thread was stripped of the crankshaft,so I use a other front housing incl shaft from my spare box. One of my favorite British classic vintage diesels.T...
1954 Super Tigre G 26 1.5 diesel test run after carter repair!
Переглядів 3 тис.5 років тому
After some set back,I could finally run Kens engine.The semi broken shaft was a surprise..but in the end..all end s up fine.. Also later I noticed,the cylinder was not tight well,so carter pressure leaks there..you can see some air bubbles,if look close.The contra piston was also a small issue,but both things are solved.I use Nickel plating this time to increase the Contra piston...not sure,if ...
German JENA 2,5 cc DK - NVA making for Tomasz
Переглядів 3,1 тис.5 років тому
A short clip special on request for a Polish customer.He need for his Jena 2,5 some missing parts...so enjoy the clip!
Aluminium.brazing & carter repair and piston heat up techniek
Переглядів 5 тис.5 років тому
Welcome for this very special episode.For my friend Ken in Australia,I have to repair a 1,5 diesel Super Tigre engine with broken engine flanges as well my C.I.E diesel made in the USA after WW II . I had first no planes to film this,but later I thought,this will be a pretty interesting video for you guys. As vintage model engines have many time a broken or damage carters,I think it will be mos...
Super Tigre -G 28 0,5cc 1954 diesel...a great test run
Переглядів 2,3 тис.5 років тому
Finally a long search has its end...at a price! But I know,this one wount come cheap..a LOVELY peace of art..and so fast! The engine had little running time,as the carter dont seal well,so it was almost not possible to start it.I made a new gasket and borrow the needle from a 1,5 ST diesel..and of we go...ready to show its real "potenca" All Super Tigre engines are very good performers...and th...
E.D. Super Hunter marine conversion .."Ala casa"
Переглядів 2 тис.5 років тому
Today we look at some work I have done some time ago.Buy on Ebay Australia,a new in box Super Hunter.I know about those AC version,but they are heavy and not nice looking in my personal opinion..So I try to give it my touch.Sadly the quality is not as it was in the early days of E.D. The plastic moulding is badly done.The rotor is misformed and the ventury is to soff.When tighten the spraybar,i...
Bannister 2,5cc "Hunter" diesel ,home cast and build @ Bill Bannister (Bannister engines)
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A complet home build engine by Bill Bannister/Uk. A lovely design,based on the ED Hunter,but with 2.5cc. Bore 14,stroke 16. Bill ask me if I could take a look at the engine to get some better performace. After a change to the transfer ports (2 in place of 4),as well the timing,..a new rear rotor with shorter induction period,adding lubrication slits to both ends of the con rod. Also further l a...
Taipan Mk3 2,5 diesel..another great Taipan
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Taipan Mk3 2,5 diesel..another great Taipan
The Kratmo engine odyssey...& run the 1948 1,25 diesel
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The Kratmo engine odyssey...& run the 1948 1,25 diesel
Jena model engine range... and Aktivist 1956 test run
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Jena model engine range... and Aktivist 1956 test run
E.D. Baby 0.5cc diesel... another gift from Finland!!
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E.D. Baby 0.5cc diesel... another gift from Finland!!
Mini DOOLING 0,6 Diesel made by VA...?
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Mini DOOLING 0,6 Diesel made by VA...?
Profi K -12 (JSO 19 replica diesel) ....a huge thanks to Rich Long!
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Profi K -12 (JSO 19 replica diesel) ....a huge thanks to Rich Long!
Clan 0.24cc model diesel engine..finally running! A new rebuild!
Переглядів 9 тис.6 років тому
Clan 0.24cc model diesel engine..finally running! A new rebuild!
1951 Byra 4,5 twin shaft (car unit) at high rpm
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1951 Byra 4,5 twin shaft (car unit) at high rpm
Byra model diesel 4,5cc made with a twin shaft for car use
Переглядів 4466 років тому
Byra model diesel 4,5cc made with a twin shaft for car use
Danish Viking 2.5 diesel model engine 1950-68
Переглядів 2,5 тис.6 років тому
Danish Viking 2.5 diesel model engine 1950-68
BYRA ,1cc diesel model engine ,Spain 1954
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BYRA ,1cc diesel model engine ,Spain 1954
Jiri Patrman 0.6cc sideport diesel, 1970
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Jiri Patrman 0.6cc sideport diesel, 1970
The engine is the very first version of the Mk III 2.5D as indicated by the small raised circle & small letter "T" cast on the opposite side of the crankcase to the later versions
The mk 3 is my favorite Ken... A so great runner.. Even in it's Standart form, with no mods done to it.. :-)
lOVE YOR CHANNEL ty
Many thanks my friend!! Its nice to read such replies!!..I will try to post a bit more!
Que planos usaste
I use the genuine plan...it was published in an old English model engine book...There is a friend of my in the Ukraine, which have made a few of this engines..even better than this one...Let me know, if you have interest. I do not know the price, He also sell the crank case castings, if you want to build it your self.
@@valic000 el libro model enginer plan book
Good to see someone with a passion for these fine old engines. I have recently obtained a 'Black Head' JENA motor, a Glow Plug version, sadly it is missing it's carburettor. Any leads on obtaining a carburettor would be appreciated.
Ho John. Many thanks for the kind words...What exact parts do you need? A C/L carb or an R/C ? Kind regards from the Netherlands.
@@valic000 R/C would be good. I see that the Carburettor mounting on the crank case is threaded.
@@Huckebein2 Is the engine you have similar to this engine_ Or the later engine with two ports? .
@@valic000 unsure 🤔 I have not striped it down yet. I could send a photo... Messenger or WhatsApp.
I have one of these engines, I got it as a 14yo i'm now 68 and it's in a box with all my other DC engines from my youth in New Zealand
Lovely..The Taifun Hobby Mk2 was also one of my first..the very first was a bone Engel Rebell...which never run..as it was complete worn out...runs today how ever..and my very first one was a Star 0,5 blue head..lovely memories! Keep them smoking!!!!
@@valic000 Hello, thanks for replying, I dug it out of the box of engines two days ago, it's missing the spray bar assembly. The serial # is 77442
I, if you live in NZ, you can a contact Dean Clarke, he is a good friend of my and rebuild engines, as wel build fantastic multi cylinder diesels. Check out his website.. I am sure, he can help you much easier directly in NZ.. His website is. Cre8tionworx Dean Clarke www.cre8tionworx.co.nz/
@@valic000 Thanks for your reply. No I live in Australia now, but will keep it in mind. Thanks for your response .
Hi , what's the fuel for it ? mix
It is a mix of 1/3 Kerosine..or you can use good car diesel fuel, then 1/3 castor oil and 1/3 ether....
I love my ball-race Drone, and it is fixed-compression so you can vary the run a little bit to suit different props by altering the oil ratio. The manufacturer mandated no kerosene or DERV for this engine, only ether and oil. At least it runs cool. Thanks for the video!
Indeed, the Drones, Micronesia and others are a different story.. They need the different fuel, to get the best out of it.. As wel keep the on good shape... I think run a drone with a regular fuel will run it to hot.. Adrian's website has an good article about it..I have also both types of the Drone.. Lovely motors! Happy running!!
@@valic000 I have put up a little video of it if you would like to listen
im really glad you have posted and you are well.this engine is a beast, i would really love to see it in a plane :)
Many thanks my friend!! I have many project..but so little time..I do my best to post now and then....
The 1cc diesel engine was a good introduction to aeromodelling. I have the mk.1 and Mk.2 ED Bees in my engine collection. Other popular 1cc engines around the same period were the AM10, the DC Spitfire, and the Frog 100.
Hi Sidney. What the Cox BabyBee was in the USA...was the E.D. Bee in the UK..and Europe as wel..A very dependable workhorse..easy starting..and alot fun!!...And sold many times in all its variations.... Kind regards..and keep them smoking! Peter
I have one of those in my collection but the head fins were not made
I have also now a very nice casting, made by a good friend of my from the Ukraine.. If you want to have a machined head, I am sure he can do it for you..The Sparrey is a nice British classic!
The AM-35 engine is 3.2cc.
I hve 3 different John engines,including this 0.3cc gem. My other John engines are a red head 0.35cc diesel with vertical fins. The cylinder head is rotated to alter the compression. My other John diesel is a more classic design of 0.5cc with normal fins and a tommy bar to set compression. All 3 engines have the same crankcase. I believe the latter 2 engines are very rare since I hve never seen them advertised on Ebay.
Hi Sidney! It seems, you have them all!..Indeed a 0.5 version was also build..as wel the rare vertical fin type... I have also now in total 3 of them. Sadly the weak point is the small end with the ball end connection..I have another one,which have the same broken piston/ rod arrangement.. Otherwise, they are great runners. Many thanks for your comment! Kind regards, Peter
it is excellent👍...I would like to see another project like this here.
Hello my friend! I wish, I had more time... I have a lot interesting projects, but sadly free time is a limiting factor... To many engine repairs next to my regular life. Making a longer video takes quite some time... I will try to post from time to time! :-)
ja diesen Motor hätte ich gerne gehabt, mir fehlte jedoch das Geld
Kann eventuel einen Verkaufen..Schachtelneu..mit Brettchen, papieren und aufkleber..alles dabei...Lasse es mich wissen wenn interesse da ist.. L.G. Peter
Ja den hätte ich vor 56 Jahren wollen - gebraucht - aber danke@@valic000
Love the cat at 2:55!
Many thanks Gloria!! ....Me too... ;-)
Love the music.
Many thanks!!! ;-D
Eccellente!
Gracie Mille!!
I visit here again after out chat on the net. Fantastic job on this engine. Your refurbishments are so interesting . Im a fan!
Many thanks Steven!! It was indeed a mess,when I got the engine, but came out very nice, once all was sorted out!! Best regards from The Netherlands! Peter
Ого!😮 Я не думал что увижу подобное это выглядит потрясающе! Мы в кружке делали что то подобное из микродвигателей Комета мд 5
Большое спасибо, мой друг!! Очень добрые слова от вас! Знаю, что несколько типов двигателей устроены так, и все можно сделать, если потратить на это время.. ;-D Я был очень удивлён, как хорошо работает двигатель! Я не подозревал об этом. Я думаю, что из-за больших впускных каналов он обеспечивает хорошую выходную мощность. Помните, что я использую пропеллер 10х5! У меня много проектов, но, к сожалению, так мало времени, так как редактирование видео требует много времени... Но я буду стараться публиковать сообщения время от времени... Желаю вам прекрасного, здорового и отличного нового года с множеством прекрасных проектов! Питер
@@valic000 спасибо! И желаю удачи и вдохновения на новые проекты в новом году;)
It’s good to see you are still posting video’s! I never knew Jena made a twin.
Many thanks Derek...This engine was build some time back and had the pictures in my PC..so I thought, lets do the editing finally!! Have a great , happy & healthy new year Derek!
Krásná práce!
Dekujo mockrat!!! Vrci moc dobrze!! Heski Pozdrav, Petr
Merry Christmas valic000 great to have you back.
Merry Christmas again!! Thanks a lot!!!!! Will try to post a video here and there...Have a nice and healthy 2024!!!
excellent , nice twin !! happy new year !!
Many thanks John!!!! Happy new year soon my friend!!!!
donders knap gedaan man ik wou dat ik zo goed was met een draaibank/gereedschap
Aa..nou werkt het tenminste!! ;-D Ja maar vergis je nit,was wel ff en klusje....echt heel wat uren ingestopt!! Maar ben erg blij met het resultaat...buten verwachting moet ik zeggen... Alvast en mooie jaarwisseling..en spreek je vast weer snel!!! Grts. uit Zaandijk!
Sorry for reactions were switched of....should now work fine...
je nieuwste video staat op youtube kids ik denk niet dat de bedoeling is
Ha, ha.. ja, youtube is heel erg met sensoring..tegenwordig moet je alles goedkeuren..anders word het mischien nit togelaten....Ik ben en betje klaar met YT..
@@valic000 dat valt opzich wel mee dat youtube kids dat kan je zelf kiezen bij het uploaden en voor de rest zo lang je niks vermoord of vloekt dan gaat het 90% van de tijd goed
@@robot797 Ik heb net gekeken..ook reacties zijn niet te zien..ik weet zeker, dat mensen wat hebben geschreven... YT is niet meer wat het was..Ook gaan ze ongevraagd reclame op gooien, oder het mom, van auteurs recht..terwil de video all jaren lang op staat..ao ineens... ze hebben geld nodig denk ik ..LOL
Ik heb het net kunne veranderen.. maar jammer, ik denk en aantal comments zijn weg...Bedankt voor de tip!!!
@@valic000 is dat niet altijd zo bij coperaties dat is waarom ik een voorstander ben van adblockers
What about an ME Snipe RC with mufflers? Diesel RC and muffled seems so neglected while at the same time being the most rare and advanced design? Whyyyyyyyyyyy??????? Thanks, Thailand Paul
Hi Paul...First a very happy Christmas time to you and soon a healthy and happy new year!! The Snipe 1.5 I have in an RC version, but so far never run the mine. The throttle is not very advanced on the engine, and I have no idea, how well or not they work.But if you take a look at a small PAW with R/C carb, they work really excellent,..muffler ring or a real muffler, it does not matter.. Some diesel model engines do not to well. Important is, that the RC carb is much smaller then on a Glow, and a bleed air system with an adjustment screw, and it should work pretty well.... Best regard Paul!! Have a nice time these days!
Eeeeehhh, Heartbreak Hotel!!! Hahahah.... @@valic000
Hi Peter. Great engine for sure. One of Frogs best. Full of little oddities too. Mine needs NVA fully open to start, then almost closed to run! Lots of end play, too.🤪 Keep up the good work.
Hi John, Many times there is a leak via the shaft. so bad suction is the result..but once it runs.. it is not a big problem, but you h ave to close the needle a lot then..Indeed great engines. I rebuild the early plain head Frog for Adrian Duncan some time back, and it was a bit modified, it was a such great runner!!
Hi Peter, Do you accept vintage engines for restoration? Tomas, Slovakia.
Hi Tomas. At the moment, I must sadly pass, as I have to many work still standing. I am very sorry Tomas.I Iove the rebuilds, but I have to finish first other work..
Peter, thank you for the reply. As soon as you will have time, please let me know. Thank you. @@valic000
Will do Tomas! I am very sorry for now..but I have to finish of other work first. @@tomasmatus7756
Hi Peter, I am a model engine collector amd would like to get in touch with you to ask you to restore vintage diesel model engine. Thank you.
Hi Tomas. At the moment, I have a lot work, and as I have also a regular job, free time is in very short supply.I wish, I had more time to do all the work I have ahead of me. Do you need parts to be anodized? Kind regards, Peter
kerel leef je nog?
Hoi mate!..Ja we leven nog steeds!..Ik heb helaas haast geen tijd voor nieuwe videos...Moet werken, and heb veel motoren werk..Ben veel op FB, Model diesel groep....maar zou best graag en viedo will make...
@@valic000 kan gebeuren joh gewoon rustig blijfen en zoals een clown ooit zij altijd blijven lachen
I think that you have the left-handed pusher propeller fitted back-to-front, with the flatter surfaces on the suck side and the more convex surfaces on the blow side. This will greatly reduce the thrust.
Thank you once again, Peter - i will bear in mind what you say regarding the Anodizing - i had thought to try my hand at it as well as some aluminium barazing / welding sometime. Kind regards to you, Chris.
Thank you, Peter.....yes, i am hopeful it will run again.....the fit of the Crankshaft in the crankcase is nice and free but not sloppy and the con rod is pretty good, too. getting there ! I invested in an Anodizing kit.....have you any thoughts on this.....i believe i may have to bring the cyl. head back to bright state before i can begin to re - anodize. Learning a new skill !!
That good news on the internal condition.. Anodizing is not so difficult.. but I not recommend to do it on a real part..It need time to be good at it..as well you need the correct color...It need a bit practice to get the correct color back to the head....that is sometimes not easy....And indeed, you need a plain clean part, before you start anodize it...There is a lot info on the web..thats where I also got my info from...read, try and learn from mistakes, thats the way to do it...Mistakes are the best school!
Yes, very many thanks, Peter,, to you for troubling to reply to my message to you regarding the Manxman Piston making....i will, as you say, take my time on the job, and let you know in due course how it turns out. Kind regards to you - Chris.
Thank you, Peter, for your most helpful advice and messages regars the Manxman and aluminium brazing etc; slowly getting there....will persevere. My best wishes to you for troubling to reply.
Hello Valic...many thanks to you for your advice re. freeing up the CP....much better now, just sorting out the comp. screw as it tends to strip the head thread (ali.). Keep well, and my kind regards to you....
Sounds good...Close to be a runner again!
Thank you very much Valic000, for your advice.....have yet to run the Manxman, but am going to persevere. My kind regards to you, too.
Many thanks Chris...I hope, it will be fine with your engine. Take your time, no rush on such a job...It has to be perfect!... Let me know, how it ends please... Kind regards, Peter
❤ I was in the factory in the 70. in west Berlin
Hi! Sorry for the late reply.I missed it some how..What lovely! It must be very interesting to see it all...I wish, I had seen it as well..Any pictures..? ;- )
Hi, no pics, sorry
Hi - I love your videos and work! I have a Frog 100 Mk1 with a broken needle valve. Would you be able to help/ direct me to someone who could help? Many thanks, James
Hi. I think I could do it. Do you need just the needle or complete Nva? Other wise reply to me on model diesel group on Facebook pls.
Great job, Peter. My Irvine 20, jus like yours, has really black oily exhaust. Cant figure out why! Even on 20% oil in fuel.
Hi John, If black residue comes from t he exhaust, it is usually a sign, the engine gets to hot.Try reduce the compression.What type of fuel do you use? You can try also to ad Cetaan Booster, so the engine will run much smoother and on a less higher compression. About 2-4% is enough. Let me know, about your fuel...Best regards from Holland! Peter
That's so cool! I got one myself to bad it seems to be stuck
Use heat and WD40 to free it up slowly and carefully.Usually with the heat it will start slowly to turn over...Indeed..lovely engines!!
I tried it myself, no results yet. In the Netherlands it's not really common unfortunately makes it harder to get a mechanic who can safely open it
Muy buen trabajo !!! Un gran técnico , me gustaría tener los planos de ese motor para hacer uno soy tornero y hobbista un abrazo desde Argentina!!!🇦🇷
I have an Axminster CO lathe (mini). Perfect size as I have limited bench space. Thank you, Peter.
…..thank you for the tip about lapping the piston before drilling the wrist pin holes. I have bright mild steel as my piston material ?nothardened). Hoping it will wear well inside the hardened liner. I have a very tight contra piston although it does knock back with aloud crack sound. Proves it does move with increased/decreased compression. So helpful, your videos. Chris.
Chris, if you make the new piston from soft steel, it will expand to much,when heat up in the run. This will give most likely problems.Cast Iron do not expand a lot,and the bore taper is made for that. Good luck with the Manxman...I hope, you get it done!
Excellent and most helpful video - rebuilding an Allbon Manxman diesel 3.44cc capacity. New piston needed. Thank you. Chris.
Like the Cars, too. All power to you !!
Fly cutterused for cutting exhaust and transfer ports ? Thank you - Chris.
Is mild bright steel ok for a piston ? Running in a hardened steel liner. Manxman Chris.
Hi Chris. The Manxman has as almost al Model diesel engines a cast iron fine grain piston. The taper in the bore is ground for that piston as well. The Mills engine use steel on steel.but both parts are harden,and use a different geometry inside the bore. You find cast iron bars on Ebay/UK, and if you have a lathe, you can make the correct piston Cris....But it has to be a fine grain Cast iron. I use also old solid car camshafts...the softer ends or the inner core. It is how ever usually a lot work, to get down to the soft core.This material will give how ever a piston, which hold a long time, if done well.. Good luck! Peter
Brilliant - esp. the heating technique for piston expansion. I noted - only air cooled NOT oil quenching. Must try sometime - thank you. Regards - Manxman Chris.