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flyingphil2
Joined: 04 Dec 2009
Posts: 117
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 Posted: Wed Feb 02, 2011 2:57 am Post subject: Electric Flap |
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Hi,
I've been wondering about the electric flap mod for a taildragger. Ignore the 'taildragger' bit in this case as it's actually the standard system fitted to the tri-gear.
I like the simplicity (and have all the parts) to modify the mechanical mono flap system and then just have 2 indents on the flap arm guide (half flap and full flap). This to me is a cheap, lightweight and fail safe system. The electric flap mod is interesting though.
My question is: Do you operate the rocker switch for flaps up or down and then look at the markings on the flap and then stop operating the flap switch when the flap is 'about in the right position'. Or, is the system 'Cessna style' where you hit the switch and wait while the flap moves to half flap and then hit the switch again if you want full flap?
If the system is of the former description above then I kind of think that the electric flap is just another distraction in the circuit if you are operating the switch and looking out to see when it's reached the correct angle versus just moving the mono handle to the correct indent.
Have I understood the electric flap system correctly or is it more slick than I think?
Thanks,
Phil
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brian.davies(at)clara.co.
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| Posted: Wed Feb 02, 2011 3:19 am Post subject: Electric Flap |
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Hi Phil,
Nothing clever about the electrical system. It is just a rocker switch and
visual check for position.
Regards
Brian Davies
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rob(at)hyperion-ef.com
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| Posted: Wed Feb 02, 2011 7:29 am Post subject: Electric Flap |
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I also found the standard electric flap system lacking so I designed and
built this simple modification. The attachment shows the mechanical and
electrical components and circuitry that allow a momentary contact switch to
get the flaps moving and stop at the next position going either direction.
A "traffic light" on the panel shows red for "full" orange at "half" and
green for "in motion."
Since I am not yet flying I can't confirm that the notches in the rod are
located precisely for half flaps but from static tests they are about right.
Best regards,
Rob Housman
Irvine, California
Europa XS
Rotax 914
S/N A070
Airframe complete
Avionics soon
--
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Flap_linear_position_device.pdf |
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Flap_control_and_indicator_circuit_Rev_A.pdf |
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flyingphil2
Joined: 04 Dec 2009
Posts: 117
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| Posted: Wed Feb 02, 2011 9:51 am Post subject: Re: Electric Flap |
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Thanks for the confirmation Brian.
Thanks Rob for the circuit diagram and drawing. That looks like a good mod which I may be interested in doing.
Phil
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Ivor Phillips
Joined: 16 Jan 2006
Posts: 253
Location: London UK
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| Posted: Wed Feb 02, 2011 11:44 am Post subject: Electric Flap |
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Another possibility is the FPS from Aircraft extra's, You can adjust it for up to 5 increments of your choice and with a potentiometer on the flap motor to drive a LED display,
Ivor
http://www.aircraftextras.com/FPS-Plus.htm
On 2 February 2011 15:22, Rob Housman <rob(at)hyperion-ef.com (rob(at)hyperion-ef.com)> wrote:
[quote]I also found the standard electric flap system lacking so I designed and
built this simple modification. The attachment shows the mechanical and
electrical components and circuitry that allow a momentary contact switch to
get the flaps moving and stop at the next position going either direction.
A "traffic light" on the panel shows red for "full" orange at "half" and
green for "in motion."
Since I am not yet flying I can't confirm that the notches in the rod are
located precisely for half flaps but from static tests they are about right.
Best regards,
Rob Housman
Irvine, California
Europa XS
Rotax 914
S/N A070
Airframe complete
Avionics soon
--
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flyingphil2
Joined: 04 Dec 2009
Posts: 117
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| Posted: Thu Feb 03, 2011 2:42 am Post subject: Re: Electric Flap |
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That looks interesting as well. Thanks Ivor.
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