40% Turbo Laser (scratch built)

[octanehuffer]

So it has been proven in hardcore 3D flight huh?

[McFueler]

Man, can't we just all get along ?

[BTerry]

	Quote: Originally Posted by octanehuffer
	So it has been proven in hardcore 3D flight huh?

Does Yuri Higuchi count? His plane uses them. Watch this:

YouTube - Broadcast Yourself.

&feature=related
3D flight doesn't require a lot of torque to move the control surfaces due to the lower speeds. All this controversy was resolved a few pages back when you were on vacation.

Now back to the build...

[octanehuffer]

Not being negative here. Last I was reading, they were not proven and nobody was able to prove it. I didnt see anything else about being able to perform 3D, because Roger cant 3D, so his only point was they worked fine.

[BTerry]

I know you weren't being negative, I didnt' take it that way at all. I think most people were confused about the design.

First point: The way Roger (and Jack and Scott and Tony and Yuri, and others) has his control surfaces set up is exactly what one would expect, the control surface is deflected directly by a servo through a pushrod, with no other "voodoo" involved. The only difference from completely standard practice is the tab itself has a second control horn and pushrod which are attached directly to the wing/stab/vertical fin as it were. When the surface deflects the tab moves in the opposite direction, which generates an aerodynamic force to move the surface in the direction of deflection and removes some of the load requirement from the servo.

Second point: MOST 3D maneuvers are performed at relatively slow flight speeds. Despite the large control surface deflection angles, this slow speed means the force of air working against the surface is very low. Therefore for relatively slow-speed 3D (say under 50 mph) the actual torque requirement to deflect a servo can be much less than the torque required to move the same surface in an IMAC-type maneuver setting (for example 15* aileron deflection at 100 mph).

Everybody else: To be sure, this thread got way out of hand a few pages back and Roger requested we avoid the whole tab controversy in his thread. If anybody has any more questions send me a PM and I will try to explain. Please honor Roger's wishes and keep this side discussion out of the thread.

Brett

[forgues research]

Not many pictures lately but here is one of the shear web being installed..

Roger

[BTerry]

Roger (or Jack, Tony, Scott...) what is the longest single stretch of spruce on this plane? I assume the fuse longerons are the longest. I am going to buy some Sitka in a few weeks and want to get it long enough to avoid splicing.

I found a boat building supply house with a good stock of air-dried vertical grain Sitka Spruce, for sale by the board foot.

[jack strickland]

	Quote: Originally Posted by BTerry
	Roger (or Jack, Tony, Scott...) what is the longest single stretch of spruce on this plane? I assume the fuse longerons are the longest. I am going to buy some Sitka in a few weeks and want to get it long enough to avoid splicing. I found a boat building supply house with a good stock of air-dried vertical grain Sitka Spruce, for sale by the board foot.

Hi Brett Get a 6 foot length. Wow you are lucky to be able to get this fine wood for your build. However white pine will work also, as the I beam construction of the wing spar is very strong. Also the fusalage does not need the extra strength, it is your choice, of course. You will save some weight with the pine.
Jack

[forgues research]

	Quote: Originally Posted by BTerry
	Roger (or Jack, Tony, Scott...) what is the longest single stretch of spruce on this plane? I assume the fuse longerons are the longest. I am going to buy some Sitka in a few weeks and want to get it long enough to avoid splicing. I found a boat building supply house with a good stock of air-dried vertical grain Sitka Spruce, for sale by the board foot.

Brett, I'm sorry I didn't get back to you on this question, but Jack is right on this .

Roger

[jack strickland]

Hello all
Ray at Norray will furnish the 40% Laser canopy for $25. Its part no. is AW31%. It is for a Extra 300 and is about 24 inches long, the front part has a very pleasing slope and will adapt to the plane nicely. Again his email is norray9963@att.net phone 940-692-4475
Jack

[Tony Hallo]

When I need longer than 48" pieces, I order spruce from Aircraft Spruce.
http://www.aircraftspruce.com/catalo...s/capstrip.php

[forgues research]

On these pictures, I made another tube for the other two wing panels I am making , (remember two lasers this time)
Also since the balsa blocks I got are only 36 inches long, so after cutting the proper thickness and width, I have to splice them .which you can see waiting for the glue to dry.

Roger

[zoomer260]

	Quote: Originally Posted by octanehuffer
	Not being negative here. Last I was reading, they were not proven and nobody was able to prove it. I didnt see anything else about being able to perform 3D, because Roger cant 3D, so his only point was they worked fine.

This is a side note not to do with boost tabs but I see it as an opportunity.(Sorry Roger) I see all kind of planes for sale and they are glad for a lack of a better word to advertise it as never "3Ded" I really never understood that because to me 3D is low speed, high AOA flying.

Seems to me this is way LESS stressfull on everything involved with the airplane. And I mean everything. With the exception of maybe a 5-10 minute hover and lack of proper airflow over the engine. But excluding the engine everything else is having a very nice day.

For me it would seem to be more logical for higher speed stuff stressing the airframe and servos more. A 15 G turn and high speed snap comes to mind. And lot of IMAC stuff has got to be harder on the plane.

Or am I just not getting it ?

[McFueler]

I believe that what they mean is that 3Ding a plane on the deck you can smack it on the ground by draging the tail or 3D landings tail wheel slaped on the ground and then the main gear droped but if the plane has not had the tail slapped all over the ground then yes you are right high speed snaps are harder on the airplane than anything else !

[zoomer260]

	Quote: Originally Posted by McFueler
	I believe that what they mean is that 3Ding a plane on the deck you can smack it on the ground by draging the tail or 3D landings tail wheel slaped on the ground and then the main gear droped but if the plane has not had the tail slapped all over the ground then yes you are right high speed snaps are harder on the airplane than anything else !

I finally wish I had one of those funny post smileys with the sign pointing up !