40% Turbo Laser (scratch built)

[forgues research]

	Quote: Originally Posted by Rod
	Hi Roger that is a pretty big and interesting project. Let me guess. Heli tail rotor type pitch control. Heli governer. Would work well with a very peaky pipe on a 2 stroke. Also be good on a reduction drive. Rod

Hi Rod,
Nope , not using heli tail rotor for pitch control, the governor yes it will be a heli unit

I am trying to keep the unit compact and light..

This is for the Turbo prop engine , but like I said a long ways to go but getting there ...

Roger

[forgues research]

I have been working on the Fiber OPtics, the constant speed prop, the cowling and installing the aileron servos.


Here are a few pictures of the servo on the ailerons, one single servo of 189oz analogue with boost tabs of course.

Roger

[jack strickland]

Hi Roger
I know the servos you are using are the ones on hand, Just like to inform others that 135 in. oz. @ 4.8 volts are the servos in my Laser, they were also what I had on hand. The rudder servo is the new Airtronics 94780, 300 in. oz. at 4.8 volts. They are all hooked up directly to the receiver. I have never used a 5 cell pack in any application. Not saying what you are doing is wrong, its just what I have sucess with. What I'm trying to say is other configurations can work just as well. Also there is no power distribution board in any of my planes. I'm of the old school of kiss idea, if it ain't in the plane, it cannot fail.

cheeers

[forgues research]

	Quote: Originally Posted by jack strickland
	Hi Roger I know the servos you are using are the ones on hand, Just like to inform others that 135 in. oz. @ 4.8 volts are the servos in my Laser, they were also what I had on hand. The rudder servo is the new Airtronics 94780, 300 in. oz. at 4.8 volts. They are all hooked up directly to the receiver. I have never used a 5 cell pack in any application. Not saying what you are doing is wrong, its just what I have sucess with. What I'm trying to say is other configurations can work just as well. Also there is no power distribution board in any of my planes. I'm of the old school of kiss idea, if it ain't in the plane, it cannot fail. cheeers

Yes I understand what you are saying. Another note, with the proper boost tab on the rudder, you don't even need a 300 oz servo . I am using a 200 oz because I have this on hand and I could have used smaller also.

I am also using Lipos because they are lighter, and the distribution system I have is one I developed with built in regulators ...

Roger

[zoomer260]

	Quote: Originally Posted by forgues research
	I have been working on the Fiber OPtics, the constant speed prop, the cowling and installing the aileron servos. Here are a few pictures of the servo on the ailerons, one single servo of 189oz analogue with boost tabs of course. Roger

Roger that is THE shortest linkage I have ever seen. I'm trying to figure out how you fit a servo in the trailing edge like that.

No worry about linkage flex !

Okay, I'm a Dummy. This is a 40% wing. Plenty thick enough in that area.

[zoomer260]

	Quote: Originally Posted by jack strickland
	Hi Roger I know the servos you are using are the ones on hand, Just like to inform others that 135 in. oz. @ 4.8 volts are the servos in my Laser, they were also what I had on hand. The rudder servo is the new Airtronics 94780, 300 in. oz. at 4.8 volts. They are all hooked up directly to the receiver. I have never used a 5 cell pack in any application. Not saying what you are doing is wrong, its just what I have sucess with. What I'm trying to say is other configurations can work just as well. Also there is no power distribution board in any of my planes. I'm of the old school of kiss idea, if it ain't in the plane, it cannot fail. cheeers

Jack you are gonna start something using that small a servo in a 40% and on 4 cells too .

I can hear the detractors now warming up their post fingers !

I like it that you ae not using any distribution systems or regulators etc. I am not saying that stuff is a bad thing but I too believe "if it ain't in the plane, it cannot fail". And I just never saw the need for them.

I have gone to 5 cell packs for the servos because all the data I can find supports the idea that the servos can handle it just fine and it gets the most from the servos in speed and torque.

[forgues research]

	Quote: Originally Posted by zoomer260
	Roger that is THE shortest linkage I have ever seen. I'm trying to figure out how you fit a servo in the trailing edge like that. No worry about linkage flex ! Okay, I'm a Dummy. This is a 40% wing. Plenty thick enough in that area.

That's right it fits this way in the 40% but I installed the servos a bit more in the middle on the 34%

Roger

[jack strickland]

	Quote: Originally Posted by zoomer260
	Jack you are gonna start something using that small a servo in a 40% and on 4 cells too . I can hear the detractors now warming up their post fingers ! I like it that you ae not using any distribution systems or regulators etc. I am not saying that stuff is a bad thing but I too believe "if it ain't in the plane, it cannot fail". And I just never saw the need for them. I have gone to 5 cell packs for the servos because all the data I can find supports the idea that the servos can handle it just fine and it gets the most from the servos in speed and torque.

Many ways to skin a cat. This setup has worked perfectly for me for 30 plus years.

[zoomer260]

	Quote: Originally Posted by jack strickland
	Many ways to skin a cat. This setup has worked perfectly for me for 30 plus years.

Yeah I can understand that. I flew Nicads until the Summer of 2008 and then switched NiMh. Next season I go A123.

Never had a problem with the Nicads. So I am really breaking away from my old ways fast ! Hah !

Can't see me ever going Lipo. And get this, I am gonna try and go 2.4 next season as well ! It may be the end of next season but if I can get the plane I really want going I'll try and keep the momentum going all the way.

May even go with cannisters and a three blade. Two other things I have never tried. That way when I am flying a 35% 110cc plane that does not have 45 degrees of throw in my old fogie style the noise will NOT compel everyones eyes skyward. Maybe I can sneak it by.

Hoping to see Rogers constant speed prop rig soon !

[loadtoad1a7]

is this the same one you are selling and will you be getting it in this scheme

	Quote: Originally Posted by forgues research
	For those of you that are still interested, here is a picture of the Sbach 342 with boost tabs on the elevator. Roger

[jack strickland]

	Quote: Originally Posted by zoomer260
	Yeah I can understand that. I flew Nicads until the Summer of 2008 and then switched NiMh. Next season I go A123. Never had a problem with the Nicads. So I am really breaking away from my old ways fast ! Hah ! Can't see me ever going Lipo. And get this, I am gonna try and go 2.4 next season as well ! It may be the end of next season but if I can get the plane I really want going I'll try and keep the momentum going all the way. May even go with cannisters and a three blade. Two other things I have never tried. That way when I am flying a 35% 110cc plane that does not have 45 degrees of throw in my old fogie style the noise will NOT compel everyones eyes skyward. Maybe I can sneak it by. Hoping to see Rogers constant speed prop rig soon !

I hear ya. I used nicads till recently, now Sanyo's new Enloop packs are in most everything, including transmitters, They are nimh, aa, with 2000ma capacity, and will hold 80% of their stored charge for one (1) year. Goodby recycling. Am going to stick with 72 for a while, to many splats around yet. Am also looking forward to the cs prop Roger is working on.

[jack strickland]

	Quote: Originally Posted by zoomer260
	Yeah I can understand that. I flew Nicads until the Summer of 2008 and then switched NiMh. Next season I go A123. Never had a problem with the Nicads. So I am really breaking away from my old ways fast ! Hah ! Can't see me ever going Lipo. And get this, I am gonna try and go 2.4 next season as well ! It may be the end of next season but if I can get the plane I really want going I'll try and keep the momentum going all the way. May even go with cannisters and a three blade. Two other things I have never tried. That way when I am flying a 35% 110cc plane that does not have 45 degrees of throw in my old fogie style the noise will NOT compel everyones eyes skyward. Maybe I can sneak it by. Hoping to see Rogers constant speed prop rig soon !

Oh one more thing. At a recent IMAC contest, the local club had us run the engines at wot and used a db meter, just to check how the muffler systems worked. The results were: the stock mufflers were quieter than the cans, etc. One can job was 103 db! Go figure.

[forgues research]

For the constant speed prop, I am looking from any of you guys, a 10mm heli swash plate , let me know if any one has a spare one ...

Roger

[ddlstang]

Jack, on the db tests there were lots of variables there. The ability of the engine to turn rpm had more effect than mufflers being that prop noise was louder than engine noise. On the ground if then prop was able to unload then they got real loud but the same plane in the air with proper throttle was very quiet. YES, it still does come down to proper throttle management.

[jack strickland]

	Quote: Originally Posted by ddlstang
	Jack, on the db tests there were lots of variables there. The ability of the engine to turn rpm had more effect than mufflers being that prop noise was louder than engine noise. On the ground if then prop was able to unload then they got real loud but the same plane in the air with proper throttle was very quiet. YES, it still does come down to proper throttle management.

All that is true. All i did was state the facts, and if you were there you must have seen the same results.