40% Turbo Laser (scratch built)

[forgues research]

	Quote: Originally Posted by mmikeny
	hi roger i have been following the thread and am building the 34% from jacks plans i hope you wouldnt mind if i ask you a couple of questions is it ok to cut a slot in the root rib and the end tube fixture to use the hot wire to cut the wing tube socket and could you explain how the 1/64 plywood goes at the trailing edge to stiffen the wing i have built many planes but never from just plans and i plan on building the 40% right after i finish this one so thanks for the thread and any answers you have thanks mike

I certainly don't mind with your questions, and if I can't answer, we do have Jack Strickland here also.

Pertaining to you're question, The root rib template does have the hole cut for the wing tube socket. What I do is I cut through the to spar to get the hot wire inside the hole.

The first thing I do, is cut the top of the wing without cutting the spar notches. and to do this, I simply put a small piece of plywood with the same shape of the rib template to cover the notches.

Then I remove these small pieces of plywood, and go back to cut the notches. then I cut the hole for the socket.

Not sure if I explained this properly, let me know if not and I will make a drawing.

As for the tiny plywood in the trailing edge of the wing, I don't put a piece of plywood, but this would seem like a good idea.

Roger

[jack strickland]

	Quote: Originally Posted by forgues research
	I certainly don't mind with your questions, and if I can't answer, we do have Jack Strickland here also. Pertaining to you're question, The root rib template does have the hole cut for the wing tube socket. What I do is I cut through the to spar to get the hot wire inside the hole. The first thing I do, is cut the top of the wing without cutting the spar notches. and to do this, I simply put a small piece of plywood with the same shape of the rib template to cover the notches. Then I remove these small pieces of plywood, and go back to cut the notches. then I cut the hole for the socket. Not sure if I explained this properly, let me know if not and I will make a drawing. As for the tiny plywood in the trailing edge of the wing, I don't put a piece of plywood, but this would seem like a good idea. Roger

Hi Roger
The plywood at the trailing edge of the wing does two things. It stiffens the t.e. tremendiously, and also prevents the trailing edge from warping. Its very hard to damage the t.e. with the plywood in place. Have also srarted using 1/32, and even 1/16 to increase the t.e. width and add even more strength to this area. What do you think.
Gheers

[forgues research]

	Quote: Originally Posted by jack strickland
	Hi Roger The plywood at the trailing edge of the wing does two things. It stiffens the t.e. tremendiously, and also prevents the trailing edge from warping. Its very hard to damage the t.e. with the plywood in place. Have also srarted using 1/32, and even 1/16 to increase the t.e. width and add even more strength to this area. What do you think. Gheers

Sounds like a good idea to me and I think I will install this on the 40%.

Roger

[forgues research]

Although no pictures, first wing panel sheeted and set aside and getting ready to sheet the other panel

Roger

[tonyc9075]

Roger what was the final weight of the smaller Laser? I am enjoying the big one so much I am thinking of building the smaller one for ease of transport.

Tony

[forgues research]

	Quote: Originally Posted by tonyc9075
	Roger what was the final weight of the smaller Laser? I am enjoying the big one so much I am thinking of building the smaller one for ease of transport. Tony

Tony,
the smaller laser came out at 17.5 lbs but this is with the Turbo prop engine which is quite light.

Roger

[McFueler]

Is that turbo prop engine lighter than a DA-50 ?

[forgues research]

	Quote: Originally Posted by McFueler
	Is that turbo prop engine lighter than a DA-50 ?

Good question, the Turbo prop wren 44 weighs in at under 4.5 lbs with all its accessories needed.

I was thinking a DA 50 or DL 55 would be great with the 34%

Roger

[tonyc9075]

Wow Roger, I was thinking of the BME 58 Extream which is 2.8 lbs. With header and Bud can muffler and all else needed mine should end up at 17lbs or less. That would be a good combination. What are you going to fly yours with now that you are moving the Turbo to the 40% Laser?
Tony

[forgues research]

	Quote: Originally Posted by tonyc9075
	Wow Roger, I was thinking of the BME 58 Extream which is 2.8 lbs. With header and Bud can muffler and all else needed mine should end up at 17lbs or less. That would be a good combination. What are you going to fly yours with now that you are moving the Turbo to the 40% Laser? Tony

Mine will only fly with the turbo engine, I might install the wren 54 on the 40%, but that's still in the air for now, so if the 44 goes on the 40% then the 34% will stay in the hangar as a back up...

If I was to put piston engine in the 34%, I would install a DL 55 having seen my friend fly the DL 50 . Its an awesome an engine, but your choice would be extremely good, you do have to remember I dont like 3D flying, an old patternf flyer so I don't need the power you would probably need.

Same with the 40%, if I wasn't going to use the turbine, I would probably go for the DL 110

Roger

[jack strickland]

Hello Laser flyers
Good news about the canopies. Ray Hamel--norray9963@att.net will make a quality canopy for about $30 for the 40% Laser. His phone number is 940-692-4475. Nice chap and will make just about anything one would want, canopy wise. I am in the process of finding out the one I used to order for the 34% and 40% planes.Prices are reasonable also. Will post the part no. soon.
Cheers

[Spdstr280Z]

	Quote: Originally Posted by forgues research
	...voila the tube. Roger

You guys can give Roger all the crap you want, but at least he does use "voila" correctly ! I have seen walla, wa-la, wah la.....

Jason

[forgues research]

	Quote: Originally Posted by Spdstr280Z
	You guys can give Roger all the crap you want, but at least he does use "voila" correctly ! I have seen walla, wa-la, wah la..... Jason

Good one Jason, but I'm French so I suppose that does help

Roger

[zoomer260]

	Quote: Originally Posted by jack strickland
	The way I see it is the tabs influence will be DIRECTLY PROPORTIONAL TO THE AMOUNT OF AIR OVER IT. Does this make any sence?

I am not gonna read through all this to get to the end to see how it turned out (this time) just to comment.

The only thing I have been able to come up with to make as much sense as it needs too ( I believe Roger) is that at low speed you do not need the high torque as much anyway. Takes little or no torque just to move the surface up and down, side to side etc. The faster you go at higher (etc) deflection the more torque needed. Low Speed requires very little torque.

Airspeed IS when the torque is needed. Then the boost tabs do the job yes ?

In a hover it is prop wash that requires the torque again. Enough propwash and the tabs work again. Yes ?

Makes perfect sense to me. Flame suit on.

[forgues research]

	Quote: Originally Posted by zoomer260
	I am not gonna read through all this to get to the end to see how it turned out (this time) just to comment. The only thing I have been able to come up with to make as much sense as it needs too ( I believe Roger) is that at low speed you do not need the high torque as much anyway. Takes little or no torque just to move the surface up and down, side to side etc. The faster you go at higher (etc) deflection the more torque needed. Low Speed requires very little torque. Airspeed IS when the torque is needed. Then the boost tabs do the job yes ? In a hover it is prop wash that requires the torque again. Enough propwash and the tabs work again. Yes ? Makes perfect sense to me. Flame suit on.

No flame suit needed, you are absolutely right...

Roger