Great to see those pics...
airknocker wrote:
Cliff said: "It was called the ‘wooden bomber,’ because a lot of it was made out of wood, which made it very light, and fast. ...
I'm not aware of the structural weight being
significantly lighter than an equivalent stressed skin construction.
The de Havilland rationale for wood was threefold: non-strategic material, DH expertise in wood, and skilled woodworkers not being used in the war effort. How much the last was a real factor I don't know, but it makes good PR. I wonder if anyone can provide a meaningful comparison of the Mosquito's robust structure's weight compared to the metal equivalent?
The main difference between the de Havilland wooden monocoque in the Mosquito is how much more rigid the structure is compared to a piece of metal skinning. In use the stringers and formers in metal gave an equivalent rigidity and structural integrity, of course.
Quote:
Cliff also said: "...That central spar was made of very highly compressed wood. I watched it burn for over three hours, and that spar was still intact. It was amazing how strong it was.”
Again, interesting. Most people don't understand wood and some of its properties well. A solid heavyweight wooden beam will remain structurally sound and will take a
long time to burn, apparently, and is, in engineering terms, a remarkably good structural member in a building or equivalent temperature fire, compared to other beam structures.
The Mosquito's spar isn't 'highly compressed' but a built up structure which was glued, the gluing being done under pressure (but NOT to compress the wood). Compressing wood ruins much of the wood's sheer and stress resistance by crushing or damaging the cells, and you then have to replace the destroyed strength with some other mechanical strengthening; hardly efficient material use.
There are those better versed on the Mosquito's structure than I, who may be able to add / correct the above, but it's sad how many post 1930s and non-homebuild aviators - and the general public - have such a poor opinion and understanding of wood's properties and potential uses. It's the most important composite and manufacturing material in humanity's history, I'd suggest.
JohnB wrote:
No airworthy aircraft were destroyed for the films, though one of the flyers, RR299 was destroyed in a fatal crash in 1996.
We should note that tragic accident was
after giving
decades of entertainment at many UK airshows, and John's date notes. See:
http://vintageaeroplanewriter.blogspot. ... rr299.htmlAnd a pedant point, that John got but most may have missed. the BAe operated Mosquito RR299 G-ASKH, wore 633 Squadron (a fictitious unit, as we know) 'HT' markings for most of its post-film career; but never appeared in the film
633 Squadron, but only in the sequel,
Mosquito Squadron; which of course, featured '633 Squadron'...
Regards,