Hey guys I was wondering if any of you know how much wing loading a guy can get away with on a little model like this mustang. It has 303sq" of wing area and calls for a tiny engine. Well I got a great deal on the plane and have a old radio I will be using and want to over power the model. I want to add as much engine to the plane as possible. This is all just for fun as I do expect to probably fly the wings off. So how big of an engine do you think this plane could take and still get off the ground. I have a 400' paved runway. Now don't laugh but I figured one of my old beat up .46's with a 3-blade prop would be just right. Don't bother mentioning all the beefing up that would be required because it will all be done so just give me your opinion on how large an engine it could still fly with.

Dave

1st edit = spelling
2nd = pics

Mine has the Norvel .074, because I couldn't see a good way to mount a .15. My Pica Messerschmitt has a .15, and it's a rocket, and the inverted .15 fits well.

If you cut off everything forward of the firewall, you'll probably have room to mount your .46. You're right to ask about balance, there will be some tail weight necessary to balance it.

Good luck,
Dave Olson

Because of the size of he wing, loading above 30oz @ sq ft woud be too much. The air foil was designed to provide only so much lift at a given speed so you will have to go much faster. I would venture a guess of about 28oz@sq ft at speed would be about as much as you could expect. That would put it at about 3.5 lbs. That is very light for a .46 engine.
I do not believe that that airframe can take the vibration from that size engine. I know the stock elevators and rudder can't take the stress at necessary speeds. It's also my belief that power will have to be fed in very slowly and the airplane be up to speed before full throttle could be used or the plane would torque around the propeller.
I think that a light weight .40 or a hot .28-.32 would be a better hot rod if you want more than one flight. I'll fly mine with a .074 and be happy.

I'm still waiting to hear what you found out. Did you make it work or give up?

It's on the back burner. I have 2 kits to put together first. I think you might be right about it being to big though. No matter what I plan to put bigger hor/vert stabs on it made out of 1/4" stock.
Dave