|12-08-2008, 10:43 PM||#1|
RCC Expert Contributor
I am: Jeff.S
Join Date: Nov 2007
Location: Beaumont Alberta
Feedback: 5 / 100%
Total Props: 10
evolution 26 gx
Remove this ad - become a site supporter!
I have a cmp 70" Zero and I am thinking of buying an evolution 26gx engine to power it. This is my first war bird. From what I understand most war birds are tail heavy. This plane calls for a 120 four stroke nitro. I think a 26cc/ 1.6 weighting around 40 OZ should be a good choice. I am not sure of the quality of the evolution gas engines and the type of performance I can expect. This is the smallest and lights gasser I can find for this project. Also, I would like to install smoke on this engine and build a custom muffler so it exits both sides of the cowling. Is this to much engine for this plane? Does a 1.6 gasser produce the same thrust of a 125 satio?
|12-09-2008, 12:01 AM||#2|
RCC Supreme Contributor
I am: Gary M.
Join Date: Jul 2003
Location: Stoney Creek, Ontario
Radio of choice:
# of RCs: 7
Feedback: 25 / 100%
Total Props: 9
Re: evolution 26 gx
Gas will also give you about the best smoke you can get from an engine. I honestly don't think you can go wrong with your choice of engines.
About your comment on war planes being inherantly tail heavy...I would ask around about the particular model you have and what others have found with this plane. You say the plans call for a 1.20 sized four stroke, it may very will balance correctly with that engine up front and adding a heavier gas engine may call for added weight or a shift of weight to the tail to balance it.
I really don't know but it doesn't make sense (to me ) for a manufacturer to call for a particular engine and then have it way off balance as a result. I suppose it does happen but just to be prepared, I would definitely ask what others have found.
Hopefully someone reading this thread can offer that info for you. All the best with your project. I do like the idea of a gas engine though for all the good reasons.
Stoney Creek Hawks RC
MAAC No. 43659
Radios used: Spektrum DX6i
Current builds: 1/4 scale J3 Cub & Neiuport 17 and KMP B-25.
Currently flying: Scratched Tele 40, Parkzone Stryker & 60" SPAD Debonaire
"Time flies like an arrow - fruit flys like a banana." Groucho Marks
|12-10-2008, 03:26 PM||#3|
RCC Senior Contributor
I am: ByronF
Join Date: Jul 2007
Location: Bowmanville, ON
Feedback: 9 / 100%
Total Props: 0
Re: evolution 26 gx
If you do a search on RCU there are a number of threads about this plane.
Because of its short nose moment it does usually require a pound or more of lead in the nose to balance with a 120FS so many of the guys have gone with gassers which offer more weight with the same performance.
Needing nose weight in a warbird is not unusual especially those with short nose moments such as Zero's, Hellcats etc. but others with longer nose moments such as p-51's can sometime get by with little or no weight.
We have a fellow at our field who ran an evolution gas engine this past summer. Although I don't recall what size it was, I was impressed with how easily it started and how well it ran. I don't recall him having any engine problems with this motor. So based just on my observations of his engine and recognizing the plane you have (incidentally I have the same plane to assemble) and its short nose moment I would think the evo 26 qx would be a good choice.
My theory is slightly nose heavy warbirds are a lot more forgiving than tail heavy planes.
Let us know what you decide and how it works out.
|Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)|