Engine sizes for different weight/class aircraft?
 

Hey again! Im wondering if there is a list of engines that go great with 60 size, 9LB-12LB Aircraft

RE: Engine sizes for different weight/class aircraft?
 

Well, normally the kit or arf will provide a list of engines that will work either marginally (lower sized engines) or very well (larger sized engines) with that particular model.

I've seen a database that showed weights of aircraft and what engines to use (a range of engines because there is a lot to consider, not only weight, but wing loading and so on). I might have it somwhere, and if I do, I'll include it as a picture and upload it, or copy and paste it.

But, for the plane you are talking about, an OS .75 AX would be ideal.. :D

Yeah, yeah, I'm partial to OS engines.. I admit it. But that's because I've had great success with them and they seem to do the job very well.

CGr.

RE: Engine sizes for different weight/class aircraft?
 

A 60 sized plane means it's made for a 60 sized engine....the manufactuer is of course your choice. Like CGR, I like OS as well. you can always go up a size as a .75 powers most 60 sized planes well without being over powering. Rarely will I due use the minimum recommended engine...as it tends to uner powered.

RE: Engine sizes for different weight/class aircraft?
 

It also depends on the type of aircraft. If that aircraft is a Cub, a 91 4-stroke would be a better choice

RE: Engine sizes for different weight/class aircraft?
 

Yeah, Mike. You're right, of course. There is an Excel spreadsheet somewhere, I know I have it, got it from some web site but don't remember what one it is, that lists planes and what engine/prop combinations are appropriate, and it is pretty good. I think it's at home on my other PC so I'll have to search that out and make a like to it.

Still nothing heard about Louisville, however, we ARE working on that as we "speak". If it goes as planned, I'll drive up to Toledo. I'm hoping that everyone is on for the trip. We have quite a bit of work to do at Louisville, but I think I can manage to either arrive a day early and head up, or stay a day late and drive up (depending on what week we are going to do the testing). I've been in this sudden change mode before, and am always ready to carry the already-packed carry on baggage to Philadelphia International..

CGr.

RE: Engine sizes for different weight/class aircraft?
 

The air plane i have is low wing sport plane a 60 sized airplane but it had a 1.20 on it..so im trying to find somthing similar in power..and extra power is what i like too

RE: Engine sizes for different weight/class aircraft?
 

I was reading an old RCM today in "the office" (I have many older issues) and came across a tip from the editors that stated multiply AUW by .08 to get the 2 strok size.. then x 1.5 to get the 4 stroke size taking into account type of model, etc. So 5 lbs x .08 = .40.. sounds right.

RE: Engine sizes for different weight/class aircraft?
 

chart please?:D

RE: Engine sizes for different weight/class aircraft?
 

Well, I apologize for that. I've not been able to find it. I do have one that shows different props for different engine sizes, but that's not what you wanted. Maybe that is what I thought I had and thought it was plane vs. engine sizes.

But, any 60- 75 size engine or larger four stroke, up to 90 I guess, would work for that plane, although I am not familiar with four stroke engines, Minn specified what engine for a Cub.

If this is a new plane, well, take a close look at the manual and decide what range you wish to fly the plane. Keep in mind that recommendations can be a tad bit deceiving, perhaps that is the reason for your question.. but you can't go wrong with what I recommended in my first reply, the OS .75 AX will power just about any plane in that size and weight category, I promise you that.

CGr.

RE: Engine sizes for different weight/class aircraft?
 

Never have said what the plane is and what 1.20 you had on it. Are you looking for a two stroke or four stroke for the new power plant, gas or glow? How did you like the mystery 1.20 in this plane. Are you looking to 3-D the plane with a new engine or fly the IMAC pattern?? I like .91 two strokes in my 60 size stunt planes but have gone to the 1.08. The little Zenoah 20cc or RCS 1.40 are pretty good choices in gas power and the .91 to 1.20 are pretty good choices in four strokes. The YS 1.10 could be the killer engine for you?? CG, we really need that chart!!!:D

RE: Engine sizes for different weight/class aircraft?
 

My experience is that 10 to 12 pound airplanes will require a .90 size engine. A 60-size airplane generally should not weigh 9 pounds. However a .75 will fly a 9-pound airplane. A 1.20 engine is usually used in 14 to 15 pound airplanes.

Bill

RE: Engine sizes for different weight/class aircraft?
 

My Venus II is about 9 pounds as is my Excelleron 90. Both have OS 1.20 AX's and they need the power for Pattern flying.

CGr

RE: Engine sizes for different weight/class aircraft?
 

I think these might be a tad low depending on flying styles i have a ~12 pound extra that has a moki 2.1 in it (2 stroke glow ~ 4.5 hp)

Steven