40% Turbo Laser (scratch built)

[forgues research]

	Quote: Originally Posted by Cracky
	Sorry to hear it Roger...

Thanks but one must move on

Roger

[sjmorgan]

Roger you will do quite nicely if the plane even comes out at 32lbs. Mine is 28lbs with a 100 twin and including 50oz.s of fuel. One word of advice though if using a really light engine package up front. Hand select and weigh any wood that is used for the tail and if possible use all kevlar for the flying wires. Its really a shame to add weight to an aerobatic model to make it balance. Ive built about 40 or so of these airplanes from scratch and what I learned is that the flying wire system is where the strength needs to be and it doesnt have to be steel either. Im sure you know all this but just thought Id throw it out there.

Scott

[forgues research]

	Quote: Originally Posted by sjmorgan
	Roger you will do quite nicely if the plane even comes out at 32lbs. Mine is 28lbs with a 100 twin and including 50oz.s of fuel. One word of advice though if using a really light engine package up front. Hand select and weigh any wood that is used for the tail and if possible use all kevlar for the flying wires. Its really a shame to add weight to an aerobatic model to make it balance. Ive built about 40 or so of these airplanes from scratch and what I learned is that the flying wire system is where the strength needs to be and it doesnt have to be steel either. Im sure you know all this but just thought Id throw it out there. Scott

Scott,
You are right, and the flying wires in the tail will be the same I am using on the 34%, Kevlar 150 lbs) very light and very strong.

I am also choosing the wood much more carefully . every ounce counts.

I will also pull the enigine forward as I did on the 34 % proportionately that is , 2" for the 34% so it will be about 2.5 to 3 inches more forward then plan calls for. to offset the the engine weight which is very low.

Roger

[tonyc9075]

Roger. You have noticed what a floater the smaller one is, the big one is more so. Landings are ridiculous, with a little head wind you almost need to push it down.

Something I hope to try in the future is reduce the size of the landing gear. I would like to try the 2024 aluminum and use a blank that is 1/3 skinner. It is not needed to save weight but sure would look a little more scale.

OH and Scott, you can count the Lasers you built as 41, all I did was follow your directions, and you cut the wing.
Thank you Scott.

[forgues research]

	Quote: Originally Posted by tonyc9075
	Roger. You have noticed what a floater the smaller one is, the big one is more so. Landings are ridiculous, with a little head wind you almost need to push it down. Something I hope to try in the future is reduce the size of the landing gear. I would like to try the 2024 aluminum and use a blank that is 1/3 skinner. It is not needed to save weight but sure would look a little more scale. OH and Scott, you can count the Lasers you built as 41, all I did was follow your directions, and you cut the wing. Thank you Scott.

I think a big thank you is for Jack Strickland for such a fine design , and guys he still has the plans

Jack is making me a landing out of 2024 T3, also smaller to make it lighter.

Roger

[McFueler]

[forgues research]

Another slow day but did get to make a few fittings and the rib templates.

Roger

[forgues research]

This being the week end, more flying then building going on but I did manage to finish making the flying wire fittings, and started assembling the foam slabs for the ribs..

Roger

[jack strickland]

	Quote: Originally Posted by forgues research
	This being the week end, more flying then building going on but I did manage to finish making the flying wire fittings, and started assembling the foam slabs for the ribs.. Roger

Hi Roger
Question, are you going to make the spar tubes parallel with the spars? Or are you going to center them between the spars. The first option will give you 0 degrees of dihedral on the top of the wing. And may be the cause of rudder coupling with the roll axis. The first option will also give the bottom of the wing effective dihederal. The 2nd option will be no dihedral effect. I have built them both ways and I cannot tell any difference with the coupling problem, if it indeed exists. What do you think?
Jack

[forgues research]

	Quote: Originally Posted by jack strickland
	Hi Roger Question, are you going to make the spar tubes parallel with the spars? Or are you going to center them between the spars. The first option will give you 0 degrees of dihedral on the top of the wing. And may be the cause of rudder coupling with the roll axis. The first option will also give the bottom of the wing effective dihederal. The 2nd option will be no dihedral effect. I have built them both ways and I cannot tell any difference with the coupling problem, if it indeed exists. What do you think? Jack

Jack,
My intensions is to make it the same as the 34% which is parralel to the top ..

What do you think?

Roger

[jack strickland]

	Quote: Originally Posted by forgues research
	Jack, My intensions is to make it the same as the 34% which is parralel to the top .. What do you think? Roger

I think that is the way to go, have done it both ways and prefer the parallel method.
Jack

[dm8221]

Have just reviewed your turbo laser forum,understand laser plans by Jack Strickland would like to purchase plans if possible.