Battle-floyd

[billrcpilot]

HI Guy's

In the process of building a TWO-BY-FLOYD, this is my first combat bird, has any of you all ever built one and do you have any building tips


Thanks for the help:confused:

Billl
The Flying Tiger

[Montague]

part of what to do with it depends on how you intend to fly it. Are you planning on flying it in combat, and if so, in what class?

I've built the smalle battle floyds, I've never done a two-by, so I don't know if the construction is basically the same in both or not. I assume it is.

Leave the wing as long as you can. I don't know if the cores for the two-by come over-long like they usually do for the BF. The smaller one flys better with the wing at the full length of 48" rather than cut down to 40" as the instructions say.

Taper down the back of the fuse. That big squared off back of the fuse is a huge producer of drag. You can really pick up some noticeable speed with just this one change.

The BF has the fuel tank on the outside of the fuse, I don't know abotu the TBF. If it is external according to the instructions, get it inside the fuse, again, the really reduces drag.

For durability in combat, balsa is a bad thing. I started using coro for the fuse sides, with a fiberglass rod inside the coro for reinforcement. Balsa sheeting over foam just breaks too easily.

On the wing, the BF uses a full thickness balsa spar. I don't know about the TBF. But I do know that I almost always cracked the spar on the BF in mid-airs. You might try spruce or even using some carbon fiber with the balsa. (I usually fixed cracked spars with CF patches, btw). I've now gone to just using the same 1/8" fiberglass rods used in most combat planes for wingspars, and done away with balsa in the wing entirely.

[billrcpilot]

Thanks for all the infomation, the wing is 48" when both half's are joined together, Am using a yard stick for the main spar plus to more small parts of a yard stick the finish the ends. like the part of taper the back half of the fuselege. had an Email from one of you on covering the wing with rip stock (parachute materail) and using thinned down ployruethane?? i will be use a .46 the power the bird. how did you reinforce the fuse with the fuel tank inside. Thanks again for all the infomation.

Bill

[steelhead]

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[Montague]

Ripstop and polyurathane works really well, though to be honest, I've gone away from that covering technique. If you want to do it, you can get ripstop from some fabric stores, look in the outdoors or outterwear section. If you ask the people working in the fabric store, they usually have no clue, even if they have it in stock.

I was ordering my ripstop from an online kite store. There are several out there. I usually use kitebuilder.com

As for the front of the fuse, I'm not sure how big your fuse is and how much space there is for the tank. For a .46, you're going to need a pretty good size tank, a .46 is a lot of engine for that plane, I'd think. Anyway, on my smaller planes, I use coro on the sides instead of wood, and I run a fiberglass rod down inside the coro flute to help reinforce it. But there are a lot of other options.