A engine and carby compatibility query
07-31-2003 | 05:21 AM
#1
Thread Starter
Senior Member
A engine and carby compatibility query
Attached is a pic of the 35cc version of a local which weighs about 4.7 kgs!!! 1.5HP @ 7000rpm
The 34cc version weighs 4.1kgs and produces 1.1HP @5500rpm
(This is the only local lightweight engine available here!!!)
The guy says that the fuel tank for this engine has to be always mounted on the top!!!!!! and that its a carby thing i.e. no diaphgram carby on this one and I heard that gas engines usually dont like back pressure!!
Do the gas engines like fuji, zdz, ryobi, weebwacker, homelite type engines use Diaphragm carburetors?
Looking at the pic and specs, is there any scope of lightening this sufficiently and modifying this suitably for RC use??
http://www.greaveslimited.com/portableengines.htm
No replies when i posted on the 'conversions' forum so i thought this forum may be better...
The 34cc version weighs 4.1kgs and produces 1.1HP @5500rpm
(This is the only local lightweight engine available here!!!)
The guy says that the fuel tank for this engine has to be always mounted on the top!!!!!! and that its a carby thing i.e. no diaphgram carby on this one and I heard that gas engines usually dont like back pressure!!
Do the gas engines like fuji, zdz, ryobi, weebwacker, homelite type engines use Diaphragm carburetors?
Looking at the pic and specs, is there any scope of lightening this sufficiently and modifying this suitably for RC use??
http://www.greaveslimited.com/portableengines.htm
No replies when i posted on the 'conversions' forum so i thought this forum may be better...
08-02-2003 | 12:40 AM
#4
Senior Member
My Feedback: (1)
Joined: Dec 2001
Posts: 3,262
Likes: 0
Received 0 Likes
on
0 Posts
From: Hammond,
IN
A engine and carby compatibility query
Wow! This could be the next gas engine that is distributed by Great Planes.
Magneto....check.
Extra bulky parts.....check.
Low power....check.
Design borrowed from an irrigation pump....check.
Inexpensive to import.....check.
Magneto....check.
Extra bulky parts.....check.
Low power....check.
Design borrowed from an irrigation pump....check.
Inexpensive to import.....check.
08-02-2003 | 03:35 AM
#6
Thread Starter
Senior Member
A engine and carby compatibility query
guys guys...the engine performs very well from the reports i have heard. Its just the carby which is proving to be a sticking point!!!
I am in talks with a local carby manufacturer...about using a simple floating type carby with a fuel pump..lets see if thats workable!!!!
The sad part is that the only diapghram type carbys are made for 200cc engines and above and i never intend going that GIANT!!
They were talking about a diff type of float carby some 'side mouned' thingy which is a shade better than the regular motorcycle/moped float carby!!
If the requirement is not big enuf they wont do ant R&D so my best best is to use what is existing!!!!
P.S: Dont the regular full size airplanes use a float type carby too?
Is there any other commonly available carby type which will do the job?
I am in talks with a local carby manufacturer...about using a simple floating type carby with a fuel pump..lets see if thats workable!!!!
The sad part is that the only diapghram type carbys are made for 200cc engines and above and i never intend going that GIANT!!
They were talking about a diff type of float carby some 'side mouned' thingy which is a shade better than the regular motorcycle/moped float carby!!
If the requirement is not big enuf they wont do ant R&D so my best best is to use what is existing!!!!
P.S: Dont the regular full size airplanes use a float type carby too?
Is there any other commonly available carby type which will do the job?
08-02-2003 | 03:58 AM
#7
Senior Member
My Feedback: (4)
A engine and carby compatibility query
Any small Walbro or Tillotson carb will work on any small two stroke engine...It uses the crankcase pulse to actuate the pump in the carb..It will draw fuel at least 4 feet straight up and can be run in any position..All it takes is a fitting in the crankcase with a line connected to the plate on the back of the carb for the pulse..
I am not aware of any modern airplane that uses a float carb...
I am not aware of any modern airplane that uses a float carb...
