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-   -   Heikkis' Silhouette Challenge (https://www.pprune.org/aviation-history-nostalgia/459476-heikkis-silhouette-challenge.html)

skytrain10 16th Apr 2012 14:02


I remember also an article on the XB-70 telling readers, amongst other things, that it took the Valkyrie 30 minutes to turn 180 deg. at Mach 3.
Blimey, so it would effectively travel 1000 miles to make the turn - that's a turning radius of something like 300 miles! So I quess agility was not it's strong point - still, it was a fantastic machine:)

Lightning Mate 16th Apr 2012 14:20


Plymounth A-A-2004
No mate - Google the stuff on the side of the ship, and bear in mind you are looking at an aircraft. :ok:

If you wish, standby by for the radius of turn formula. :)

MReyn24050 16th Apr 2012 14:28

Something to do with Spinning (Cylinder-) Wings perhaps (Magnus effect) similar to the boat you show.?

Lightning Mate 16th Apr 2012 14:33

Correct Mel.

Read my text clue above and it will take you straight to it.


Google the stuff on the side of the ship, and bear in mind you are looking at an aircraft.

MReyn24050 16th Apr 2012 14:35

It is the Flettner 921V is it not?

Lightning Mate 16th Apr 2012 14:35

Bingo. :D

All yours mate. :)

skytrain10 16th Apr 2012 14:36


Google the stuff on the side of the ship, and bear in mind you are looking at an aircraft.
Did all that, found the photo, and found reference to the Plymouth and Mr Flettner's rotor wing! :)

MReyn24050 16th Apr 2012 14:37

Will have to be Open House I am afraid unless you can convert for me David.

Lightning Mate 16th Apr 2012 14:38


Did all that, found the photo, and found reference to the Plymouth and Mr Flettner's rotor wing! http://images.ibsrv.net/ibsrv/res/sr...lies/smile.gif
Well, I didn't find reference to Plymouth. :\

Under the circumstances I think you and Mel should toss for it then - I can't do much else.

If you both decide in Mels' favour, then yes Mel - I can do one for you.

MReyn24050 16th Apr 2012 14:41

As I have nothing to hand it is all your Ken.

skytrain10 16th Apr 2012 14:41

I've got to go out David so control should stay with Mel.....incidentally N921V is the registraton!

Lightning Mate 16th Apr 2012 14:44

Send challenge Mel.......via PM please.

MReyn24050 16th Apr 2012 14:46

On its way.

Lightning Mate 16th Apr 2012 14:48

Received - about 30-40 minutes....

Lightning Mate 16th Apr 2012 15:01

Done - PM Mel. :ok:

MReyn24050 16th Apr 2012 15:04

Thanks David here we go:-
http://i25.photobucket.com/albums/c6.../mystery-1.jpg

Lightning Mate 16th Apr 2012 15:05

Another PM Mel.....

evansb 16th Apr 2012 15:26

University of Toronto's motor-powered ornithopter "Big Flapper" ?

MReyn24050 16th Apr 2012 16:05

You have it Bri.
http://i25.photobucket.com/albums/c6...el/mystery.jpg
You have control.

evansb 16th Apr 2012 16:29

Thanks Mel. Great challenge! Here is the next one:
http://i141.photobucket.com/albums/r.../WSH120416.jpg


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