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Author Topic: Electronic Throttle.  (Read 984 times)

Offline John Rist

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Electronic Throttle.
« on: October 31, 2010, 08:16:47 AM »
Just wondering if two line electronic throttle is allowed or ever used in Carrier?  Also are there any electric powered carrier aircraft?

 S?P
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John Rist
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Offline Douglas Ames

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Re: Electronic Throttle.
« Reply #1 on: October 31, 2010, 10:12:45 AM »
Are you talking about glow engines w/ a micro-servo?
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Offline don Burke

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Re: Electronic Throttle.
« Reply #2 on: October 31, 2010, 01:21:01 PM »
Quote from: John Rist on October 31, 2010, 08:16:47 AM
Just wondering if two line electronic throttle is allowed or ever used in Carrier?  Also are there any electric powered carrier aircraft?

 S?P
Allowed if the signal goes through the lines, radio link is currently not allowed.  I am going to try to get that changed in the next two year rules cycle.

The Contest Board vote won't happen until 2012, effective as of Jan 2013.

Several successful electric carriers now flying. IMO the jury is out on whether it's worth the trouble and cost or not.  Sort of a novelty to me.
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don Burke AMA 843
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Offline Paul Smith

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Re: Electronic Throttle.
« Reply #3 on: October 31, 2010, 03:18:41 PM »
Perhaps you could get electronic flight control approved, too. 
Then maybe a no-line control system. 
A new idea that might get some traction.
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Paul Smith

Offline Alan Buck

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Re: Electronic Throttle.
« Reply #4 on: October 31, 2010, 05:02:57 PM »
it has been done. in the works to change the rule
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ALAN E BUCK

Offline john vlna

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Re: Electronic Throttle.
« Reply #5 on: October 31, 2010, 05:31:56 PM »
John,
Electric throttle control of glow engines is permitted in Navy Carrier as long as the control signals go through the lines. Clancy Arnold makes a system which works well. I currently have a spitfire setup in this manner. Two or three lines are permitted.
« Last Edit: October 31, 2010, 06:07:05 PM by john vlna »
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Offline clscale7

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Re: Electronic Throttle.
« Reply #6 on: November 02, 2010, 11:02:49 AM »
I have been flying my profile carrier model with 2 lines with electronic throttle control for over 10 years now. As long as the electronic signal is sent down the lines it's legal. Electronic throttle has some advantages, however the lines are coated so they are thicker than the normal braided lines. I don't have any 3-line airplanes in my fleet at all, everything I have has electronic throttle control.

Electronic throttle control can also be used to control an ESC for electric power. Replace the throttle servo with a speed control and you are in business.
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Fred Cronenwett
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Offline john e. holliday

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Re: Electronic Throttle.
« Reply #7 on: November 02, 2010, 07:43:15 PM »
I flew a Consolidated Mauler with pulses going down the lines to the servo.  It was a servo driver that Ken Wilson of Wilson Hobby Shop made for me umpteenth years ago.  Still have it in a plastic bag in the shop.  The two lines measured .021 where the micrometer to measure.  Really were .36 measuring at the coating.  It got me a 6th place carrier trophy.  This was at one of the Cickopee Mass. NATS.  Only got one official as my helper turned off the battery in the plane on first flight.   H^^
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John E. "DOC" Holliday
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Offline Douglas Ames

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Re: Electronic Throttle.
« Reply #8 on: November 02, 2010, 11:21:48 PM »
Quote from: Paul Smith on October 31, 2010, 03:18:41 PM
Perhaps you could get electronic flight control approved, too. 
Then maybe a no-line control system. 
A new idea that might get some traction.

R/C Tether Carrier?
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AMA 656546

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Offline john vlna

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Re: Electronic Throttle.
« Reply #9 on: November 03, 2010, 01:34:52 PM »
The increase in line size caused by using insulated lines can be avoided by making your own. Normally nylon stainless steel fishing wire is used. this can be as large as .026-.028 for .012-.015 lines. These type lines are also a bit inconsistent in actual diameter of the wire. 

I coat my regular lines with polyurethane,  two coats is usually enough to provide the insulation needed. This minimizes the lines size since the polyurethanes adds almost nothing in size.

Remember when going from a three to two line system in carrier the lines sizes increase .015 to .018 in profile and class I.; .018 to .021 in class II.
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