Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
(OP)
All,
I'm trying to understand typical voltage stability, noise and "spike voltage" characteristics typically found on GA aircraft 14V and 28V engine driven rectified alternator power systems.
Maybe the characteristics of an old 1940s automobile would do?
I'm looking into suitability of DO-160 testing and the basis for aircraft owner concerns about voltage spikes and the need for avionics bus master switches.
Thanks
I'm trying to understand typical voltage stability, noise and "spike voltage" characteristics typically found on GA aircraft 14V and 28V engine driven rectified alternator power systems.
Maybe the characteristics of an old 1940s automobile would do?
I'm looking into suitability of DO-160 testing and the basis for aircraft owner concerns about voltage spikes and the need for avionics bus master switches.
Thanks
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RE: Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
RE: Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
RE: Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
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RE: Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
He was one of my professor at Purdue in the early 60s.
There was another professor in Propulsion Engineering by the name of
Joe Liston who the students called Piston Joe. He had 100s of graphs,
nomographs... Oh, Prof Elmer Bruhn was still teaching there in 1961.
Were you a 1951 graduated at Parks? About 50 aeros in my
class and 95% went to St. Louis to McDonnell Aircraft. I still have my
original copies on MAC 338 and Mac 339.
G-pa Dave
RE: Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
We used the same book (Aerospace Propulsion Powerplants)in the late '70s at Parks also. Years later when I was teaching Powerplants at Fairmont State, I used it to supplement the text they made us use then.
While most current production GA airplanes are using alternators based on automotive designs, there are still a great many airplanes that were built in the 30s, 40s, 50s and early 60s that still use generators with vibrator voltage regulators. Not so prevalent, but still in service are generator systems with carbon pile regulators.
RE: Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
The Cargnino text was the best around,and I still pull it out to read about such obscure things as carbon pile regulators,it's fun,yeah I know that sounds crazy to most,but for me it beats anything X-Box has to offer,so when I run into people like you G-pa dave and dgapilot it makes it all worth while,we share a common bond.And like it or not all these high tech, people here talk of came from us back then,using our slip sticks and trig tables,my times have changed,and for the best I hope.
RE: Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
that my mom bought me in 1958 and Peery's 1950 edition of Aircraft Structures.
RE: Seeking Description of 14 & 28 VDC Gen Aviation Aircraft Power Supply Charatersicics
I replaced my lost copy of Perry with a paperback copy that's being republished by Dover,interesting to note that they brought it back into publication after all this time,somebody must be doing something right,and it shows that with all this high technology we have,often a person needs to get back to the basics before pretending to jump into the good stuff,a real reality check if you will.The addition of Perry is the first one not the second one he wrote in conjunction with J.J.Azar,which should never have even been published by McGraw-Hill,or at least proofread to weed out the first set of errors,anyhow I have both,and refer to them often,hand calculation methods are not a dead art,but a much needed refresher of statics and strength of materials.