40% Turbo Laser (scratch built)

[SmoothFlying]

	Quote: Originally Posted by averagebrunette
	I'll admit that i'm coming in on the middle of the topic. I have seen "boost tabs" on real airplanes. The only thing is they are connected to the "TRIM" tab in the cockpit... or at least the 737 I was in. Is there anywhere else that I can see boost tabs in RC? I must admit that I'm also kinda green in the RC realm (3 years) and just started flying big planes. I like to read about new technologies and if there is proof that boost tabs work AS THE ONLY MEAN FOR CONTROLLING A SURFACE, I'd love to save the expense of 2 7955's or 8711's. If this is the case, then I should be able to save over $500 for the build of "The Beast" when it comes out.

I would love to save the expense also. If it were the case that a Boost Tab would do more than an 8711 I would have saved $2000 between my 2 Cardens I have. What Roger doesnt understand is the precission a boost tab lacks on the hard maneuvers the planes might do with an advanced pilot. Although he is right, boost tabs are extremely effective on a full scale plane they arent as effective in our models. If that were the case, your Mike McConvilles, Jason Schulmans, Andrew Jesky's and QQ's would be bending over backwards to promote a $20 servo being much better than your 8711 or comparable. But we all know they arent because they arent as effective. Horizon Hobbies, Futaba, Hitec would be making a killing on servos if everyone were to use a boost tab and a 20oz torque servo.

[forgues research]

	Quote: Originally Posted by TeamFlatout
	I would love to save the expense also. If it were the case that a Boost Tab would do more than an 8711 I would have saved $2000 between my 2 Cardens I have. What Roger doesnt understand is the precission a boost tab lacks on the hard maneuvers the planes might do with an advanced pilot. Although he is right, boost tabs are extremely effective on a full scale plane they arent as effective in our models. If that were the case, your Mike McConvilles, Jason Schulmans, Andrew Jesky's and QQ's would be bending over backwards to promote a $20 servo being much better than your 8711 or comparable. But we all know they arent because they arent as effective. Horizon Hobbies, Futaba, Hitec would be making a killing on servos if everyone were to use a boost tab and a 20oz torque servo.

Chris, enough already, you made your point, now stop it .

[SmoothFlying]

I'm just trying to figure out why if a 20oz servo becomes a 5000oz servo with a little boost tab, howcome the big names arent using them in competition? Better yet using them at all? Or anyone for that fact.

[FBaity]

Nice Wren 54 engine, wish I could afford one.

[forgues research]

	Quote: Originally Posted by FBaity
	Nice Wren 54 engine, wish I could afford one.

Ah but you get to fly Hayes all the time , that's even better then owning one

By the way, you are one that did see me fly the 34% laser at your field with the boost tabs. for those who think they don't work....

Roger

[forgues research]

	Quote: Originally Posted by TeamFlatout
	I'm just trying to figure out why if a 20oz servo becomes a 5000oz servo with a little boost tab, howcome the big names arent using them in competition? Better yet using them at all? Or anyone for that fact.

Chris, if you were serious about learning about these, you don't go about it by blasting it and harassing me on the subject, you ask intelligent questions and I would do my best to answer, but you're way has been to make fun, harass , try to convince people against them, say absurd things, such as they are dangerous, etc. that is not the way to get answers....

[SmoothFlying]

Ok, you want to make me a believer out of boost tabs. Build one of the top kits out on the market right now and put boost tabs on it. I am quite sure it will fly ok for a Sunday flyer or out to do just loops and rolls. Bring it to your next IMAC contest or Joe Nall next year and let a few of us try an Unlimited sequence with it and give an honest opinion on it. Pick a top 40% kit and build it according to plans with boost tabs. Top kit, I'm meaning a Dalton, Carden or Aerotech. Lets see how it pans out

[forgues research]

	Quote: Originally Posted by TeamFlatout
	Ok, you want to make me a believer out of boost tabs. Build one of the top kits out on the market right now and put boost tabs on it. I am quite sure it will fly ok for a Sunday flyer or out to do just loops and rolls. Bring it to your next IMAC contest or Joe Nall next year and let a few of us try an Unlimited sequence with it and give an honest opinion on it. Pick a top 40% kit and build it according to plans with boost tabs. Top kit, I'm meaning a Dalton, Carden or Aerotech. Lets see how it pans out

I am not trying to make a believer out of you or anyone else for that matter. Sorry this is not what I do. Your are not the least bit interested in this.

I am trying to help anyone that is interested period.

OK Chris enough has been said on this from your end, lets try to help others that are really interested to know more.

Roger

[SmoothFlying]

Roger, I know about boost tabs. Thats not the question. There is no information out there on a 40% + airplane that even remotely comes close to saying they work tremendously. You have shown documentation on how a full scale airplane has boost tabs but nothing on large birds except for you and Jack's 40% Laser. Your "boost tab" thread got shut down because you could not prove what everyone was asking you to prove about boost tabs.

[forgues research]

	Quote: Originally Posted by TeamFlatout
	Roger, I know about boost tabs. Thats not the question. There is no information out there on a 40% + airplane that even remotely comes close to saying they work tremendously. You have shown documentation on how a full scale airplane has boost tabs but nothing on large birds except for you and Jack's 40% Laser. Your "boost tab" thread got shut down because you could not prove what everyone was asking you to prove about boost tabs.

It got shut down because of you and a few others slamming me nothing else

[SmoothFlying]

	Quote: Originally Posted by forgues research
	It got shut down because of you and a few others slamming me nothing else

No because we were wanting you to prove something you couldnt. You got slammed because you were saying they were the best thing to sliced bread and didnt prove it.

[Ran D. St. Clair]

Apologies to those who are sick of this subject, but just to answer Averagebrunette's question.

I have seen boost tabs and flown with boost tabs in a full scale two place Pitts aerobatic biplane trainer. It also had "spades" on the ailerons, which is an aerodynamic device for similarly amplifying the pilot input force, or to put it another way, to make the controlls feel lighter. For a Full Scale aircraft it is important, or at least nice, to harmonize the controls, meaning to have similar pilot input force for similar rates of roll pitch and yaw. We can't feel the force feedback through our servo's and transmitter, so that issue doesn't apply to us, but the force required to move the surfaces is obviously felt by the servo's.

Just to be clear, I am talking about a simple mechanical linkage that moves the boost tab in the opposite direction of the control surface. The servo (or pilot input via the stick) still moves the control surface, so the movement of the control surface is still as precise as the servo and the linkages will allow.

A different technique is to use the servo to move the boost tab and let the surface swing free. I understand that the technique works, even on full scale aircraft, but I have never seen it done on a model so I can't comment on how precise it would be, expecially under widely varying conditions of airspeed, throttle setting, etc.

A third technique uses a servo to control the surface and another to control the boost tab. Basically you just use the radio programmability to replace the mechanical linkage that I spoke of earlier. It's nice because it is easily programmable whereas linkages have to be adjusted or redesigned.

I vote we let people who like boost tabs use them and those that don't don't. Nothing much to argue about after that...

[BTerry]

For that matter a rudder or elevator counterbalance is in essence a "boost tab", the only difference being that it isn't hinged (to move opposite the direction of the control surface travel) and it lies ahead of the hinge line.

[Craven]

Hi guys!

[SmoothFlying]

	Quote: Originally Posted by Craven
	Hi guys!

Welcome, welcome Craven.