It´s the Dwyer Minihelic II, serie 5000 from Dwyer Instruments Inc. e-mail i...@dwyer.inst.com http//www.dwyer-inst.com If you want I have a draw of the sensor. It has two holes guided forward and they has 90° between it, so that the differential pressure measured among them is shown in the instrument. Eduardo
----- Original Message ----- From: "Peter Johnson" <pjohn...@voyageur.ca> To: "KRnet" <kr...@mylist.net> Sent: Tuesday, March 09, 2004 9:58 PM Subject: Re: KR>Angle of Attack Indicator-Gauge Option > Just because this is something I'm familiar with I thought I'd add some > input to John's description of his friends homemade AoA's. > > The use of a low speed ASI in the cockpit as a gauge is a good one. Another > option that could be used is a mini magnahelic gauge. These gauges are very > common in industry and are used for heating and ventilating pressure > readouts, induced air pressure measurement, etc. > > The gauges come in a variety of 'high-low' capacitys and ranges. Go to your > yellow pages and look under 'Industrial Supply' or 'Heating and Ventilating > Design'. If the firms you call don't sell them directly, they can tell you > who does. > > I would also like to say that of all the different homemade AoA's that I've > looked at and designed myself, I like this one the best, especially for it's > 'tuning' capability. Thanks for posting John. > > Hope this is of help to someone. > > Peter Johnson > KR-2Sexy with a Corvair > Kenora, Ontario > Canada > > mailto:pjohn...@voyageur.ca > > > ----- Original Message ----- > From: "Martindale Family" <johnj...@chc.net.au> > To: "KRnet" <kr...@mylist.net> > Sent: Tuesday, March 09, 2004 2:09 PM > Subject: Re: KR>Angle of attack indicator > > > > Folks > > > > A friend of mine designed his own AoA indicator. Simply a 1/2" tube, > sealed > > at the end with row of small holes drilled into it. The tube is mounted > out > > of the fuselage wall on the extended chord line 8"or so ahead of the > leading > > edge root and is parallel to it. He has the holes pointed down at right > > angles to the chord so that at zero AoA there is minimal pressure in the > > tube. As the wing/fuselage is rotated to provide an AoA so too does the > > tube, the holes present to the air flow and the pressure increases. A > > reading is obtained on some sort of sensitive pressure gauge (maybe just a > > low speed ASI) that has it's face recalibrated in arbitary units (he just > > uses numbers 1 to 5 and has the dial named " partner's pressure level"). > > The tube can be rotated to provide calibration (or desired absolute needle > > movement) and the readings noted as he approaches the stall. He flies this > > gauge on approach, more so than the ASI. > > > > John > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > --- > [This E-mail scanned for viruses by Declude Virus] > > > --- [This E-mail scanned for viruses by Declude Virus]
