Hey guys,
Ive got a busted up .25 eaglet which i wanna rebuild. I hvae never flown this plane as it was given to me that way, but i want to make it so it can go as fast as possible. Ive got two engines a .40 la and a .25 sf. I would prefer to use the .40 la but im not sure about the prop clearence. (As a rule of thumb what is a good space between the prop and ground?)
Also because this is a small plane im afraid that the engine might be a bit to powerful for it. Because the plane was built for low speed what will i have to do to make the plane will remain stable even at faster speeds?
One more question which prop should i use for this plane (.40 la) a 11-5, 10-6, or 9-8?

Thanks alot,

Papa

With the airfoil on the Eagle and the fuselage construction methods and materials I think you're asking for a very short model lifespan. IMHO that model just is NOT made to go fast and trying to do so will overstress the wing and perhaps cause it to twist and rip off or the nose will vibrate to peices. And that's assuming it doesn't just fold up at the bottom of a high speed pullout. And even if it does manage to somehow stay in one piece it's not going to go that fast thanks to the drag of that airfoil operating in the very low lift condition. And then there's the model trim that will be fighting you all the time.

You want to go fast? Make a quickie 500 type model for that 40. It won't be racing pace but it'll be much more fun to fly.

If you are just in the mood for some cut-n-try, cut-n-fly entertainment, just trim a bay off of each wingtip. It will increase takeoff and landing speed, and will probably increase top speed up to a point. If you repeat the exercise, at some point the wing will be low-enough aspect ratio that it will start making appreciably more drag and the thing no longer go faster with less wing area.

Thanks for the replies,
Im not so much interested in fast flight although it would be nice but rather something that will fly. I dont have an active plane right know as my four-star took a 70mph nose dive into the ground, so i wanted to build a plane i could fly for now. The only engine i have that i know (pretty sure) will work is a .40la. Im not in the mood to spend to much money so im not willing to buy another engine. Do you think that the engine will really be too powerful for the plane? The .40la doesnt seem to be that much more powerful then the .25sf. Also which prop would make it fly the best?
another thing is winter is coming so ill probably be putting three skies on it so it will have some more added drag

anyways thanks alot

I would think as long as it balanced out ok, nothing says you have to fly it at full throttle. I had a .72 Irvine on a Hobbistar .60 and an Irvine .61 on both an Avistar .40 and a Superstar .40. As long as you don't pour the coals to it during hard turns and dives I would think it should be fine. Also beware of flutter during any high speed passes.

Then again, I did pour the coals to it in a dive and flew the elevator off of my Hobbistar... Re-Kit! [:@]

I know many Rc'ers hate em, but there is also a million SPAD planes you can build for under $20 with that engine. Take a look here [link=http://www.spadtothebone.com/]Spad Planes[/link]




Just a thought... Maybe not a good one, but a thought none the less and that means progress!
Rik

I think a 40 LA would be just right! Run the 10x6 if you have the room if not try a 9x7! If you have time fiberglass the wing saddle! The 40 LA is a nice running engine but is very docile!

Someone did the exact thing in my club but with an OS 40 FP....he flew the hell out of it for a few weeks until the DAY came that the structure couldnt take it anymore. We all saw how the wing broke in half and the plane became a single engine lawn dart. The FP casing broke too. If you are gonna fly fast make another wing or try to plank the current one. It did fly nice and fast while it lasted.