hookedonrc

I am getting back in this sport/hobby after a 5 year absence. Glow fuel is at $25.00/gallon locally and our local hobby shop that used to make it is now closed. My plan is to stay in the gasser element because I like the sound of an engine in my planes. Yes, I am considering electrics for my smaller planes, but also want to keep fuel power in the mix. What is the smallest gas powered engine that I can consider and still fly the 40's, 60's and 90 size planes.

dredhea

My Feedback: (13)

Gas engines come as small as 20cc, which is smaller than a 60 size plane would take, perhaps around 40 size, but I'm not sure.

hookedonrc

OK..then I am still somewhat confused... If you look at an Evolution 60 which is rated for 60 size planes, it has 9.7 cc's which is less that half of the DLE 20cc. Which would make the DLE 20 double the power you need for a 60 size aircraft. Likewise, the Evolution 1.20 is 20 cc's in output for 60-90 plane sizes so it sort of makes sense. What my thought is, is that I should probably plan on flying planes 60 size and above with power coming from a 20 cc engine....no particular brand at this point. My 40 - 59 size planes should either stay with glow, or go electric. (At least that is what I am seeing.)

rgm762

My Feedback: (4)

http://www.horizonhobby.com/Products...rodID=SAIEG14B

suppose to be the same as a saito 72fs which would work in most 40size planes

davidgeorge212

Saito engines also makes a 14cc four stroke Gas engine. Fox engines makes a 50ci two stroke gas engine which would be an equivalent to about 12cc.

STUKA BARRY

SV makes a 17 which would work in a .60 size plane.

optech

My Feedback: (9)

BP Hobbies has a 15cc gasser which would work in a large .40 or small .60 size plane.

http://www.bphobbies.com/view.asp?id...E1624721&img=l

Mike

hookedonrc

Wow..a lot more smaller gas engines that I remember. Stuka ...do you know anything about the SV reliability?

MinnFlyer

My Feedback: (4)

Sorry to contradict, but I have a 20cc which I used on two different 60-size planes and they were both WAY over-powered. I put it on a 120-size Decathlon and it flew it well.

SkidMan

My Feedback: (17)

I have a NGH GT17 that I dropped right into an already mounted set of engine mounts that I had just pulled a Saito 100 out of. It seems to have about similar power, even though not broken in and pulls a H9 Miss America very nicely.

chymas

My Feedback: (1)

http://www.valleyviewrc.com/estore/j...as-engine.html

check out this one - out of stock at the moment but set up to get an e-mail as soon as it comes in.

15cc close to a .90 ci four stroke.  20cc =1.20ci

weights less than some popular .90's

hookedonrc

Nice, and with the carb in the front, the engine isn't sticking way out in front. Looks like the cost of glow is helping to get a lot more smaller engines developed that run on gas. I can't say I have a problem with that.

acdii

Hmm I didnt know they made gas so small in size. Reconsidering my choices of engines now.  A 4 stroke gas must sound pretty good.

Kmot

My Feedback: (24)

Fox Engines has a .50 size gasoline engine, and Hobby People's Magnum line of engines is supposed to get their .52 gasoline engine in some day.

Montague

Just remember that a glow 2-stroke is lighter and has more power than a gas 2-stroke of the same size. Partly because you have to include the weight of the ignition system (electronic or magneto).

I converted one of my planes from a Magnum 1.20 4-stroke to a RCGF 20cc gas 2-stroke. The plane got heavier, but the power output is a little better, so the vertical performance is about the same and most of the time the plane feels about the same as it did. But the wingloading is a little higher which shows up on landing. In my case, this is a win, and I don't see a need to have anything glow powered if I can stick a 20cc gas or bigger in there.

However, anything smaller than a 20cc, and I'm not sure the power-to-weight works out well. I'd have to see the smaller gas engines and how they fly various models. I think if you have something like a cub designed around a .40 glow engine, it would work very well on a 15cc gas. But if you're looking for strong aerobatic performance, maybe not. I suspect that many small warbirds will have higher than comfortable wingloadings with gas engines as well, though I've seen several warbirds designed for 1.20 glow power work great on the small gassers (though cowling, cooling, and firewall location can be tricky on some. models of radial engined planes seem easier to convert from what I've seen)

chymas

My Feedback: (1)

Just got mine yesterday, mounted last night and flew it today OH BABY is an understatement!!!       I mounted it in place of an OS 91 4 stroke the mounting holes and engine mounts fit exact.  Mounted it in a goldberg super chipmunk.  Swinging a 15 X 6 prop it not only goes vertical but accelerates while doing it.