OS 40 FP Diesel Conversion Part 2 The First Run **Bella**
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- Опубліковано 24 тра 2017
- Well here it is! The first ever run for me of an RC diesel engine! It was fun but there is much more to come.
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"Holy Shit" HAAAAAAAAAAA Priceless....nice save at the end!
Holy crap, nice save. You kept your cool way better than I predict I would of seeing it start to come away swinging the monster prop. Very cool. I've been very interested in trying a diesel glad I came across your video very helpful.
Very exciting. Nice save. Yes I, too, would call it a success.
David this was the most beautiful think I saw in a very long time brought back memories of Frog engines. Thank you so much for this video mate.
Another great video, I really do miss the smell of burnt ether👍
I'm pretty sure I felt your adrenaline all the way down here in Charlotte. kudos on the conversion David! I have a feeling we'll see it running tightly on the stand with a new prop by end of weekend....
I ran a second run yesterday too, just video not posted as yet.
this engine is a real HCCI , AND IT WORKS REALLY WELL
Pilot Robert will love this!!!!!!!
Yes, I am waiting for his response!
wooo that was a wee bit scary Dave..but well worth watching..all new to me too👍
1st thing on starting an engine ,,, is knowing how to stop it,,, several different ways,, tossing a rag onto the prop being last,,, ole USN vet (diesel engineman)
my main problem with these engines back in my heady days of marine engines, was simply, being not made well enough to be less vibration, hence they always got loose on the mounts what ever method you used, mostly because of the surplus fuel oil that drips on to our mounts. Even Epoxy glue vibrated apart, and bolts went flying everywhere. The Gannet 10cc Petrol engine however was calm as a cucumber :P
Exciting ! :)
It is very fun to run Marco! Especially when things go well.
Hi,
Diesels Run a lot rougher than glo engines, so the carb butterfly has probably vibrated loose, same as the engine mount bolts. Looking at the smoke I'd say compression may be a little high and then adjust the needle valve. Otherwise a good 1st attempt.
Great conversion!
This engine has a rotating barrel not a butterfly and no it isn't loose.
Ya it’s either slide or barrel
That looks like a home run in the right way . Looking forward in the next video
It turned out a bit better than I thought...well except for the end and ... well you know. LOL
It looks great, it's something I have always wanted to do, so following with much interest.
12x6 prop on a . 40 size engine looks like a midget trying to spin a ferris wheel at a carnival. That was such an easy start though, as if you used ether. Did you? you must have. Otherwise how can a cold/initial start be this easy? I can start any glow engine on a first swing or pull, but not a diesel, unless primed with accelerant. Carbuerated diesel does not reach happy op until warmed up and adjusted by you, right? Whut up?
No I did not use ether to start the engine.
i would sure like to watch your 1st maiden flight,,, be really classic,,, all that/those problems on the TEST bed,,,
This was Awesome. Great job. Loved the entire video.
Very cool👍👍👍
Excellent! With the right needle and compression settings the engine is easier to start than I thought. Could you please measure the temperature of the engine near the exhaust port?
I can, but I'm not sure what that is going to prove or show.
My PAW .15 often starts on the first flip. Diesels are quite easy to start once you get the hang of them.
David, is there a starting point to set the compression at? Or do you have to fiddle with it until it pops?
No Jim, there is no recommended starting point. The first video that I didn't include showed 7 minutes of fiddling with it only to get it to pop 2 twice. I may post that video at some point but it is really boring. But once I got it to pop the second time I knew I was close, so I filled the tank and when for this run. The second run is even better.
One method is to turn in the compression screw until you get zero clearance, then you back off a fixed amount from there, a turn or so. Much like opening a needle valve from closed.
Hello ... I bought a used Hobbico Nextar trainer plane with an O.S. 50 and did not bring the battery that the plane carries to drive the servos. It has a Futaba FM receiver of course with glass. What type of battery do I have to buy? How many volts and how many mAh? Thanks for your help.
Gabriel
I cannot advise you on that. I recommend a online RC Forum for such a thing. www.rcgroups.com/forums/index.php
If you mentioned it i must have missed it what was your target compression ratio . i would like to turn down some stock for a head looking for some specs like head cc deck heights etc.. thanks
The head I have on this engine is from MECOA. It is a standard production part. I cannot provide answers to your questions.
@@dmrcflyr2 now i have a starting point to go from . thank you
Thanks for posting a safe way to stop a Diesel is to back off the compression Cheers
Yeah, you think you could grab the compression adjustment knob with the engine flipping and flopping around like it was? Easy to say one thing but being in the situation is another.
@@dmrcflyr2 dear David l was not refering to stoping the engine in that situation but when in normal use and installation for emergency it's good to have a blanket on hand or a old towel this is how we stop the air cars at the tether track best regards
Buddy you do have a flair for the dramatic! That test was a complete success! What size prop did you say you were running?
Believe me the drama was NOT intended. I ran it again after another prop and better securing. That run was much better. Both runs had a 12x6 prop. Stay tuned for the next video showing the second run in a day or so....
Man that's a good sized prop for a .40. Don't forget to get some tach numbers.
That is one of the advantages of running a diesel, they swing a larger prop at lower RPM for more thrust. I have some tach numbers in the second video. Patience man..... LOL.
Roger Wilco.
Good one 😂😂😂😂😂😂 👍
LOL - I have one YT video where I forgot to clamp down the test stand with an MDS .15 speed engine, and another where I am cranking and fussing with a Picco FAI .40 for a minute or so until I realize I have the vent connected to the fuel inlet. You are not alone..
Can you bay new diesel engine those days?
What Is Fuel ratio you used
In the diesel world they call that a run away lol
nice save dave. why would one choose a diesel engine for their rc plane.? thank
Someone would choose diesel because nitro is about $25/gallon where I live :/
Where did you get the conversion head
Cool :-)
Using pressurization line from exaust is not good, because water in gasses does not dissolve in diesel fuel.
Optimum compression = maximum rpm.If compression is higher ,rpm slows down.
I wasn't sure about the pressure line. I had it connected on the second run as well. I will remove for the next one and see how different it does.
Does anyone know where I can purchase the parts to build a la 40 diesel conversion
The LA40 has a square head. But underneath the cylinder is round. you will need to work out the head bot dimension and go from there. you will end up with a round head as you will need to turn the part on a lathe. easier if you scored a Davis diesel head and OS FP or FSR 40
Very much luck indeed...but a lesson,you will not forget..there are the best anyway! ;-) Just a tip from a diesel head.
If you richer or lean out the fuel,it also affect the compression ratio.So in other words,if a engine is on the edge of almost perfect compr. setting,and you rich the mix a bit,it will run perfect...and if its over compressed a bit,and you lean it out a bit ,the black oil as sign of too much compr.,.... will be gone,as you lean out.The combustion chamber is very small, so its very sensitiv for any adjustment.
But diesels runs great,low fuel consumption and far more power at lower rpm, torque is what a usable flying engine need in my opinion. Thanks for sharing even your blubbers! its a lesson for others as well.Diesels do more vibrate.
Regards ,
Peter
English ?
Prop size please... .40 FP, 15% fuel, 10 x 6. Diesel Engine suggested prop sizes?
I state the prop size at 2:32. I am not diesel engine expert and there is plenty of material online to assist you if my videos do not provide the information required.
OH SHIT LOL glad you didn't break anything
Runaway!!!!!!
Ha that was oh so ROFL - I've seen the diesel crankshafts online for the 0S max 40 fp's - a stronger crank I believe - I think they were 35 bucks
Hahahahah great. Thís always happens to me
Hmm I think I'll be using a torque wrench on my stand from now on to make sure I'm being consistent when bolting down engines for testing. I have not had that happen yet and I sure don't want too either.
Hey David, did you remove the headshim?
I did not see a head shim to remove, so no.
David McIntire I have also read somewhere that you need to set the compression high to get it running and when you got it running you need to decrease the compression until the engine runs good.
That is what I read also, but it seemed to run better with more compression.
David McIntire Well, I don't have any diesel engines on hand so I can't give you any more advice. Good luck!!
Does the top of the head compress to change the overall compression rate,I see you turning what looks like a screw on top,unless it is for air. THAT thing blows me away that it can run with no spark once so ever. I would be nervous to have it start accidentally by some one screwing with it,not realizing compression alone starts it. Keep a rag handy. My brother often threw one when his engines ran backwards on start. Cool engine!
You need a stunt man
I know this video was made years ago, bit real diesels, like the ones from PAW are pretty damn good too. Look at this: ua-cam.com/video/fDelpXgHymA/v-deo.html
U should kept finger on exhaust
It you wanna stop a diesel fast put you finger over the Venturi. Also you prime a diesel the the same a as a glow engine.
I think your advice is poor. Sticking a finger over the carb when the engine flopping all around is a BAD idea. Priming a diesel like a glow engine is also a BAD idea. The engine could very well fire up while priming. I really do not think you know much about running diesel engines.
No it wont by putting your finger over the Venturi your cutting of airflow, so the engine will not run
to stop use a cloth and trow it to the prop
That just sounds like a stupid idea to me.
it is not, because we use it when the carb screw loose or thereis not another way to stop the engine, like glow sem time can´t pinch the fuel line or can´t put the finger over the exaust or carb intake.
Eduardo Riff HAHAHHAHA
Why not just decrease the compression?
Why not just decrease the compression?
diesel is unstable through a carburetor. that why a real diesel engine injects the fuel directly into chamber at tdc.
Is that why there are so many different types and manufacturers of model diesel engines?
Стол не взлетел.
Very complicated to start.
Model diesels are fun to mess with on the bench, but inferior to comparable glows. With today's glow two and four strokes, and gas engines, there are no advantages to running a diesel. Model diesel fuel availability is also a major drawback.
Modern PAW diesels are a case in point here. They are powerful, easy-to-start, amazingly responsive and throttle well. I doubt you had them in mind when you posted.
have a look at this PAW fresh-out-of-box diesel for a refutation of your claim: ua-cam.com/video/fDelpXgHymA/v-deo.html
This is so bad. Most of these guys never flew a modal airplane! Boofos makeingmoney. To bad they don't know how to do it.