A aviation & planes forum. AviationBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » AviationBanter forum » rec.aviation newsgroups » Home Built
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Building an electronic Angle of Attack indicator



 
 
Thread Tools Display Modes
  #1  
Old May 12th 09, 06:06 PM posted to rec.aviation.homebuilt
Stuart Fields
external usenet poster
 
Posts: 43
Default Building an electronic Angle of Attack indicator


"who cares?" wrote in message
...
In article , rich
wrote:
Well of course, the best is to use an AOA vane, like the jets use. The
biggest problem is where the jets conveniently mount it on the side of
the fuselage, on most singles, that's right in the prop blast,
rendering it useless. If you could find someplace to mount it outside
of the prop blast, then it would work great. But finding that
place......


I would like to see a vain mounted on each wingtip with two indicators on
the
glareshield.

I'd like to see how much difference there is in AA from one side to the
other
during steep turns, slow turns, and less than perfect rudder work.


Sounds like an interesting idea. Encoding the position of the vane would be
needed. One way might be to use minature shaft angle optical encoders ( I
tend to think digitally as opposed to analog) . I've seen prices as low as
$20 each. Put one on each wing tip mounted vane and as Jim says the rest is
easy. (If you know some good electronic tech). If you know the AoA for
stall, the output of the encoder could be compared to a preset number and an
alarm into the head set could easily be produced digitally. I've used a
combination of a modification of one of Jim's circuits produced for
Kitplanes along with some additional digital circuitry for a High/Low
helicopter rotor speed alarm and it works great.



__________ Information from ESET NOD32 Antivirus, version of virus signature database 4068 (20090512) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com




  #2  
Old May 12th 09, 06:20 PM posted to rec.aviation.homebuilt
Dan[_12_]
external usenet poster
 
Posts: 451
Default Building an electronic Angle of Attack indicator

Stuart Fields wrote:
"who cares?" wrote in message
...
In article , rich
wrote:
Well of course, the best is to use an AOA vane, like the jets use. The
biggest problem is where the jets conveniently mount it on the side of
the fuselage, on most singles, that's right in the prop blast,
rendering it useless. If you could find someplace to mount it outside
of the prop blast, then it would work great. But finding that
place......

I would like to see a vain mounted on each wingtip with two indicators on
the
glareshield.

I'd like to see how much difference there is in AA from one side to the
other
during steep turns, slow turns, and less than perfect rudder work.


Sounds like an interesting idea. Encoding the position of the vane would be
needed. One way might be to use minature shaft angle optical encoders ( I
tend to think digitally as opposed to analog) . I've seen prices as low as
$20 each. Put one on each wing tip mounted vane and as Jim says the rest is
easy. (If you know some good electronic tech). If you know the AoA for
stall, the output of the encoder could be compared to a preset number and an
alarm into the head set could easily be produced digitally. I've used a
combination of a modification of one of Jim's circuits produced for
Kitplanes along with some additional digital circuitry for a High/Low
helicopter rotor speed alarm and it works great.



Good idea, you can use a DIP switch (do they still call them that?)
to set your alarm point.

Dan, U.S. Air Force, retired
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Prop angle of attack vs age sid Piloting 47 July 13th 08 04:46 PM
Glider angle of attack indicator by SafeFlight Bill Daniels Soaring 53 December 20th 07 12:29 PM
Angle of attack Bill Daniels Soaring 27 December 19th 07 06:17 AM
preferrred bank angle indicator? Matt Herron Jr. Soaring 34 July 10th 06 02:22 PM
Lift and Angle of Attack Peter Duniho Simulators 9 October 2nd 03 10:55 PM


All times are GMT +1. The time now is 06:06 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 AviationBanter.
The comments are property of their posters.