multi-engine 1/2A?
 

Are there many multi-engine 1/2A planes out there? I was wondering whether the smaller engines had any intrinsic advantages or disadvantages on that front. Given their good thrust-to-weight ratio, i thought perhaps some Norvel .074's might make for a fun multi-engine bird.

RE: multi-engine 1/2A?
 

I have enlarged a set of factory 3-views for the Sikorsky S-42 to 1/2a. One of these days I'm going to cut the wings and start building. It will have about a 65" wing.

RE: multi-engine 1/2A?
 

I built a Ace Mach None once with a ceter section 6 inches longer then stock and put 2 Tee Dee 0.051's on it. It flew like a scalded dog. it was almost to fast to keep up with. It would be a nice plane today with throttled 0.061's or even the 0.074's.

Dru.

RE: multi-engine 1/2A?
 

My avatar has twin 0.061 engines.

Some pictures:

RE: multi-engine 1/2A?
 

I built a PG-2 which is a powered version of the WWII CG-4A cargo and troop carrier glider. It's a rare bird as only ten were ever built. Twin engines. Nine were inverted Fairchilds and one was an inverted Franklin. I tried it on electric but the batteries of those days were too big and heavy. The original was powered by two .049 TD's and would spin like a button on a privy door when one quit. Getting two Cox .049's to run exactly the same length of time is magic if you can do it. I'm getting ready try it with two Norvel .074's. If I guess right about which one quit I can throttle back the other. Another advantage is the separate tank. It can be larger for more extended flight times.

RE: multi-engine 1/2A?
 

In my younger days, I actually built the Goldberg Jr. Skylark and flew it for a summer on single Ace Pulse proportional and TWIN Pee Wee .020's It was a gas! When one motor quit, you could JUST keep it straight with the rudder hard over. Usually the second one quit within 30 sec of the first, so it was workable.

Years later, I converted it to 2 channel EK, but the thrill of flying a single channel twin was gone...:D

RE: multi-engine 1/2A?
 

I scratch built this modified Jr Falcon. It has TD .049's on it, 4 channel, six servos.
An Ace Silver Seven radio on 53 MHz. I have not flown it yet.:(

RE: multi-engine 1/2A?
 

So does anyone have a 1/2A twin engine kit out there ,, i dont realy have the time to sctratch build one ,, to many bigger planes to build ,,,

RE: multi-engine 1/2A?
 

War:

Check here:

http://www.darehobby.com/

They have several twins, take your pick.

Bill.

RE: multi-engine 1/2A?
 

There is a kit coming of Mark Rittenger's Sportwin, which is a very cool Twin Speed 400 electric design. It would ROCK on twin 1/2A power.

RE: multi-engine 1/2A?
 

Ace R/C had a twin .020 Aero Commander years ago, but it is long out of production.
A friend had one and it flew OK until one engine was out, then it didn't have enough
rudder to keep it from going into a death spiral. Throttles would have helped a bunch.

RE: multi-engine 1/2A?
 

Here is my scratch scale 049 Aerocommander built and flown about 20 years ago. Plane was very fast and flew well. Lost it when one engine quit during a turnaround when it was way out. Couldn't tell at that time which engine went out and I believe I may have made a wrong control input. I really believe I would have been able to save the plane if I have throttles to cut.