According to Wiki ( ) automatic slats were developed independently by Gustav Lachmann in Germany and Handley Page.
Both parties reached an agreement on patent and Lachmann went on to spend the rest of his working life with Handley Page.
The licensing of the Handley Page Automatic Slat became a major source of income for the company.
ATB,
Derek
'My Auntie Mabel told me I'd make a great soldier, though I don't know how 30 years working in a biscuit factory had qualified her to make that judgement.....' Eddie Nugent
I did not realise they were automatic, because they appear ( at about 3.17 in the second film) to be locked open during taxying - or is it that they automatically closed on reaching 53 kts?
cstorey wrote:I did not realise they were automatic, because they appear ( at about 3.17 in the second film) to be locked open during taxying - or is it that they automatically closed on reaching 53 kts?
That was the case....on the HP42 the slats opened at 53kts or less and closed automatically above that speed.
All photos and film of the '42 show them parked and taxying with slats extended
ATB,
Derek
'My Auntie Mabel told me I'd make a great soldier, though I don't know how 30 years working in a biscuit factory had qualified her to make that judgement.....' Eddie Nugent
Thank you Derek - you learn something new every day. I only ever flew one aeroplane with auto slats, and that on one occasion only. I think it was a Rallye ( my logbooks for the period have gone missing) but I remember the noticeable clang as the bl**dy things opened and shut which gave one a nasty fright - IIRC they were governed not by speed but by angle of attack, so that they tended to open just after rotation !
Paul K wrote:Any one else feel a little sense of longing when they watch such things ?
Well, yes.....I started school at the age of 5 in Malta. The headmaster always wore perfectly pressed whites...
Paul K wrote:Oh yes, forgot...we need a native FSX H.P. 42 !
Well you won't get it from me ..although I have been giving the old FS9 model a spring-clean
ATB,
Derek
'My Auntie Mabel told me I'd make a great soldier, though I don't know how 30 years working in a biscuit factory had qualified her to make that judgement.....' Eddie Nugent
Dave, my old bones can't manage a can opener, never mind a right hook....
Derek
'My Auntie Mabel told me I'd make a great soldier, though I don't know how 30 years working in a biscuit factory had qualified her to make that judgement.....' Eddie Nugent
) automatic slats were developed independently by Gustav Lachmann in Germany and Handley Page. 
..although I have been giving the old FS9 model a spring-clean 
