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Speed,Combat,Scale,Racing => Carrier => Topic started by: Clancy Arnold on July 15, 2007, 05:38:08 PM

Title: Electric Power at the 2007 NATS
Post by: Clancy Arnold on July 15, 2007, 05:38:08 PM

Bob Frogner and Peter Mazur with their Electric powered Navy Carrier models.

Both are using U/Tronics Control Single Channel units to control the throttle function of the Electronic Speed Control. 

Congratulations gentlemen,
Clancy

Title: Re: Electric Power at the 2007 NATS
Post by: Joejust on July 15, 2007, 06:59:48 PM

Great pictures! Thanks. Perhaps this might induce more flyers to give carrier a try. I am wonderinmg though. Didn't the AMA determine that all controls for a control line plane be through he wires?  If so, does the system shown doing that? I dont want to start a big problem here, just wondering.
Joe

Title: Re: Electric Power at the 2007 NATS
Post by: Alan Hahn on July 15, 2007, 09:28:00 PM

At least with Pete's plane, he does use a third line that goes from the handle to the arm on a rheostat in the plane (I think that is right) which provides the throttle input to the equivalent of throttle control to the Electronic Speed Control for the motor.

Title: Re: Electric Power at the 2007 NATS
Post by: bfrog on July 15, 2007, 11:58:40 PM

Joe, to answer your question, both Pete and myself use a standard Brodak 3 line handle and operate the throttle as you would on a glow airplane. The throttle arm on the 3 line bellcrank adjusts a 50K Ohm pot that is mounted on the airplane. This pot is connected to the Utronics which drives the ESC for the motor. The linkages are the same as on a glow airplane but instead of moving the throttle arm on the motor the pot is adjusted for speed control.

Its a pretty simple system that works very well. The only thing I had to do was lengthen the arm on the pot so that it wouldn't be too sensitive to input.

Bob Frogner

Title: Re: Electric Power at the 2007 NATS
Post by: Clancy Arnold on July 16, 2007, 06:09:08 AM

For clarification,

The U/Tronics Control normally comes with a 10 K ohm slide potentiometer (pot), but for this use we recommended using a 50 K ohm rotary pot.  But only use 1/5 of the total travel of the rotary pot shaft (10 K ohm).

A normal rotary pot has 270 or 300 degrees of travel, but by limiting it to 54 or 60 degrees of rotation the U/Tronics Control Single Channel unit functions just the same as with the 10 K ohm slide pot connected.

All pots used with U/Tronics Control units are linear taper, not audio taper.

Clancy

Title: Re: Electric Power at the 2007 NATS
Post by: Joejust on July 16, 2007, 09:32:01 AM

Thanks guys! I rely think this new electric systems is an answer o the future of control line flight and particularly carrier. Once again your answers clearified some puzzelment i was having. (an often recurring problem I asure you)

Joe Just

Title: Re: Electric Power at the 2007 NATS
Post by: Mike Palko on September 20, 2007, 08:54:20 PM

Congrats on the Model Aviation article!! I didn't read it yet, but I am looking forward to it.

Mike

Title: Re: Electric Power at the 2007 NATS
Post by: Clancy Arnold on September 27, 2007, 04:27:01 PM

Dick Perry

Thanks for your comments in the Navy Carrier MA column.

Clancy

Title: Re: Electric Power at the 2007 NATS
Post by: NED-088 on November 29, 2007, 10:21:56 PM

Meanwhile, on the other side of the ocean....

http://www.youtube.com/watch?v=Ha_zUxK7E28

It is very fast as well.....

Title: Re: Electric Power at the 2007 NATS
Post by: john e. holliday on December 02, 2007, 09:11:18 PM

Can do that with a Bi-Slob with no throttle.  But, in reality if his was making an official flight he was done as soon as it went backward in flight.  I have watched Melvin Schuette do that in practice, but, never in competition.  DOC Holliday