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Author Topic: Electric Seafire  (Read 775 times)

Offline john vlna

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Electric Seafire
« on: June 23, 2011, 08:33:19 PM »
I have been experimenting with all foam planes for carrier. The results have been pretty good so I thought I would try to build one suitable for competition. I choose the Seafire Mk-47 for a subject. The model is all pink foam with some carbon tube re-enforcement, and a few bits of plywood and balsa. Span is 30 inches, area 260 sq in. The motor is a Turnigy SK 3530-1400, Volcano 40A ESC, and a 2200 4s 30c battery. Control electronics are U/Tronics, located in the handle.  First flights will be this weekend; if successful I’ll sand and paint it.

Offline Clancy Arnold

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Re: Electric Seafire
« Reply #1 on: June 24, 2011, 08:23:32 AM »
John
Looks good.  Awaiting a flight report.  Might consider not painting it and contact the foam manufacturer for an advertising sponsorship!
Clancy
Clancy Arnold
Indianapolis, IN   AMA 12560 LM-S
U/Tronics Control
U/Control with electronics added.

Offline john vlna

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Re: Electric Seafire
« Reply #2 on: June 24, 2011, 07:23:42 PM »
Its maiden flight will be this weekend. Never thought of the advertising angle, maybe I'll send a note to Dow, they might at least give me some foam.

Offline Fred Cronenwett

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Re: Electric Seafire
« Reply #3 on: June 25, 2011, 05:38:36 PM »
Are you using electronic controls for the throttle control with two lines, or using 3-line with a mixture of electronics at the airplane?
Fred Cronenwett
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Offline john vlna

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Re: Electric Seafire
« Reply #4 on: June 25, 2011, 07:36:52 PM »
Fred,
It is all electric, the controller(Clancy's) is in the handle, on board is just the esc, battery and motor. Other carrier fliers use the standard 3 line BC to drive a variable resister on board, but I use the same setup for all my electric planes and this is easier in my view. Line drag of the nylon coated lines is a problem, so I make my own lines, simply coat them with water based polyurethane.
John

Offline john vlna

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Re: Electric Seafire
« Reply #5 on: June 26, 2011, 07:49:45 PM »
Well the seafire flies extremly well. I didn't time any of the flights but it appears to have a high speed in the low 60's, and it hangs very well. The 2200mah battery seems about right. The voltage after a flight was around 3.75 volts which means quite a bit of reserve is available if I can improve my low speed flying.

Offline john vlna

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Re: Electric Seafire
« Reply #6 on: July 09, 2011, 04:10:18 PM »
Turnout at the NATS was low as noted in another thread but my Seafire did well at its first contest. I took 1st in a small field of 3 contestant that flew, 5 registered. Oddly the score was the same for each flight 32secs hi, 100 secs low and 100 landings for 187.5. Foam, carbon fiber and electric forever.

Offline Clancy Arnold

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Re: Electric Seafire
« Reply #7 on: July 11, 2011, 08:43:59 AM »
The Controls in the handle John referred to is the Universal U/Tronics Control handle described in my Vendors Corner. 

It can be used for Electric via the ESC or Glow using a Servo.  Our Junk Yards War entry at the Brodak Fly-In used a Servo to control the Throttle on an OS 25 FSR engine.
Clancy
Clancy Arnold
Indianapolis, IN   AMA 12560 LM-S
U/Tronics Control
U/Control with electronics added.

Offline john vlna

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Re: Electric Seafire
« Reply #8 on: July 22, 2011, 12:12:50 PM »
The all foam electric seafire has been flying so well that I though it needed a paint job


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