|07-23-2012, 01:27 PM||#1|
RCC Pro Contributor
I am: John M
Join Date: Feb 2009
Location: Wolfe Island, Ontario
Feedback: 49 / 100%
Total Props: 13
Help with twin diesel
Remove this ad - become a site supporter!
Hey guys, need some help with this FMO twin diesel motor.
What type of fuel do I use? How do you start it?
It hasnt been started for over 40 years. It was my fathers. Its not siezed.
I remember Dad starting it up for me when I was 9 years old....but have no clue what fuel he used. Or how he adjusted those turny things on the heads. Any help would be appreciated.
Also what size is it?
Last edited by RCcanuck; 07-23-2012 at 01:32 PM.
|07-23-2012, 06:11 PM||#2|
RCC Supreme Contributor
I am: Andrew Coholic
Join Date: Sep 2002
Location: Timmins, Northern Ontario
Radio of choice:
Feedback: 5 / 100%
Total Props: 1
Re: Help with twin diesel
Well, its a lot easier to do it than to explain...
You are better off learning to run a single cylinder diesel than a twin, but its the same (just that you have two cylinders to tune)...
First, you need a fuel consisting of 1/3 Kerosene, 1/3 castor oil, and one third ether. A small percentage of an ignition aid (traditionally 2% amyl nitrate, but today there are other things you can use like MEKP or Amsoil's ACB) will improve starting.
The things on the head are screws to adjust the contra piston, which is an adjustable cylinder in the head which is raised or lowered to decreas or increase compression. The key with a model diesel is you have to adjust the compression to adjust the ignition point (timing). Too compressed, and you will run rough and wreck the engine. Too undercompressed and you wont get it to run or keep it running.
Start with the contra's backed off, and the NV open wide (blow in the inlet and back off the NV until you can tell its not restricting the venturi).
Fuel up with fresh fuel, and with a prop and a gloved hand, start flipping the prop briskly and quickly in sequence.
As you are doing this, start slowly screwing down the contra (a little on each in sequence) and make sure there is fuel coming out the ports on the cylinder. Most Diesels like to be wet.
You will hit a point where the engine will burp (fire). At this point, pick one cylinder and carefully (while still flipping) screw down the contra some more, until the engine wants to keep running. Then do the same with the other cylinder. Once you get a point where the engine will run for seconds at a time, start screwing in the NV. With a diesel, you can lean it out as much as possible (unlike a glow) until you hear it start to die, back the NV out some, and leave it.
Once you get it running, then it will need to have the contra pistons adjusted again after 30 seconds to a minute of run time... as the engine warms up the compression needs to be backed off slightly. You will hear and feel it when you are in the sweet spot.
Andrew Coholic -MAAC #26287L
1/2A to giant scale, IMAC, SAM, R/C sport, turbine jets, Heli's...
if its got a wing or two and an engine - I like it!
|Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)|
|Thread||Thread Starter||Forum||Replies||Last Post|
|DA 100 twin and DA170 twin - same ignition module???||Trumpetman||Engines||7||08-19-2012 07:18 AM|
|Wanted os 160 twin or saito twin 182||tech8||Wanted - Engines||1||11-19-2011 11:42 AM|
|Diesel, where to get it?||Donkey Doctor||Engines||5||07-10-2007 11:37 AM|
|Diesel||tractorboy30||General RC Aircraft Discussion||4||05-30-2006 09:20 AM|
|looking for a diesel||tractorboy30||Wanted - Engines||4||04-09-2006 09:27 PM|