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Uncle KeithMac, ……

[updated:LAST EDITED ON 04-04-02 AT 05:26 PM (GMT)]…… a while ago You told us that the two propellers in a contra rotating arrangement had different diameters, the rear one being slightly smaller.
Is it possible that you have a spec sheet for the Rotol fitted to the Seafire 47 or the Shackleton?
I´m interested in finding out the measurements and other data such as blade sections!

With regards and TIA,
Christer

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By: keithmac - 6th April 2002 at 20:29

RE: Uncle KeithMac, ……

Hi Steve, Yes is was St Athan. I started there in June 1973 and stayed until November 1976. Then as you probably know engine training followed the riggers to Halton. I went off to Kai Tak.
KeithMac.

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By: Steve Bond - 5th April 2002 at 07:02

RE: Uncle KeithMac, ……

KeithMac, I guess you were teaching at St.Athan then? When was that? I was on one of the last fitters courses to get the full piston engine syllabus in 1976.

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By: keithmac - 4th April 2002 at 20:37

RE: Uncle KeithMac, ……

No, my memories not that good. I have some of the notes I made when I taught props many moons ago. I taught the De Havilland D158/313/1 on the Pembroke as a basic prop, then I covered the Shack, but in less detail. When we stopped teaching piston engines we began to teach the monster fitted to the C-130K, which is a whole different game altogether.
KeithMac.

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By: Christer - 4th April 2002 at 20:22

RE: Uncle KeithMac, ……

I knew You´d have something up Your sleeve and quick as always.
I must ask, since Your book is gone, is this from memory?
If it is, no teflon coating there!

Thanks,
Christer

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By: keithmac - 4th April 2002 at 20:01

RE: Uncle KeithMac, ……

Hi Christer. Unfortunately I loaned my DH Prop book to one of my Sergeants who was studying for some exams and he never returned it. I forgot I’d loaned it to him and now it’s long gone! However I still have some information which might be useful. The props on the Shackleton were De Havilland. The basic diameter was 13ft, with the rear prop being I think, 12ft 11 ins. The front was a DF/160/334/1 or DB171/334/1 Left hand tractor with a pitch range of Fine 23 Deg to Feather at 90 Deg. The rear prop was a DF160/336/1 or DB171/336/1 Right Hand Tractor with a pitch range of 24 Deg to 91 Deg (1 deg coarser throughout the range). I’ve no detailed info on the Rotol fitted to the Seafire.
KeithMac.

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