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Copy of article in May/June 1970 copy of PF

Posted: Tue Sep 27, 2016 12:18 pm
by Richard Mole
I have a file note that

'May/June 1970 issue of Popular Flying reported tests on a Jodel D9 fitted with a trailing static where it was found that the ASI under-read by 12 knots at the stall at a true 35 knots, with the position error of the pitot reducing to zero at 100 knots. '

But I have lost my original copy of the May/June 1970 PF.

I would be very glad indeed to obtain a copy of the article if anyone could make it for me.

Thanks in anticipation

Richard

Re: Copy of article in May/June 1970 copy of PF

Posted: Tue Sep 27, 2016 6:51 pm
by Ian Melville
Sorry, 1970 predates my stack

Re: Copy of article in May/June 1970 copy of PF

Posted: Wed Sep 28, 2016 9:49 am
by Bill McCarthy
I have a copy of the July/August 1977 beside me, in which, the flight test report by Air Commodore Paul states that - "...........the aircraft continued to fly quite happily, until at 22 knots indicated (yes 22 knots) the nose dropped..............the position error at this angle of attack being 17 knots"

Re: Copy of article in May/June 1970 copy of PF

Posted: Wed Sep 28, 2016 10:22 pm
by Richard Mole
Bill, thanks for that but I already have the Air Commodore Paul flight test report.

From memory, the May/June 1970 PF article has a graph showing the error in ASI across the speed range.

I am not so much interested in the stalling speed per se but rather more interested in the calibration method using a trailing static.

Re: Copy of article in May/June 1970 copy of PF

Posted: Fri Sep 30, 2016 12:28 am
by Frank Parker
The article is by Derek Piggot. A second instrument was mounted and connected to the static on a trailing bomb which was towed behind and below the aircraft in undisturbed air flow.
If you want a copy of the article I can scan and send.
Frank Parker

Re: Copy of article in May/June 1970 copy of PF

Posted: Fri Sep 30, 2016 8:47 am
by Richard Mole
Frank, that's the article I'm sure of it.
A copy would be much appreciated.
I'm at r dot h dot surname and the rest is btinternet dot com.

Many thanks, Richard