The MkV with cannon and mg’s had a different spade grip to the earlier type. There was a rectangular gun button, press top part get mg’s , bottom part get just cannons, press middle get ‘heaven can wait’ as an old spit pilot told me….see photo

Possible practical applications are reduced internal reflections with night flyingthereby better visual cueing? Also on some applications did this not have a benefit of better FOV by putting the pilot nearer the downward slope of the nose?

I cannot see any (aircraft) performance benefit at all.

JDK,

Although I cannot think which one, I am sure there were some very stylish open coupes of the 1920’s with unframed split front glass that leaned forward. The problem is that if you opt for that, attaching a soft hood poses a bit of a problem.

Much nearer to home, my old stomping ground of the Military Vehicle Engineering at GM, there was a Danish version of the Bedford ‘R’ type military 3 tonner that had a reverse slope FRONT windscreen.

Mark

Images courtesy of The Danish Army Vehicles Homepage.

This great man not only saved unsung types (Oxford, Anson etc) but also some absolute gems….he certainly started many ‘modern’ preservationists off. A sad loss and a huge legacy….

OK, a crude stab without the calculus ( mass varies along the blade length as does speed )
centripetal force = mass x acceleration
acceleration = V squared / radius
so centripetal force = mass x V squared / radius

crude assumptions:
centre of mass is 25% blade length from the hub centre and mass is 25kg

this comes out with a radius of 0.4 m, a speed ( V ) of about 6 m/s and a mass of 25kg

This works out at 2156 Newtons, 220 kg or 484lbs centripetal force.

Anyone agree/disagree ?

It is 23:30, I am tired, I cannot believe I am having a go at this!!!

Using your assumptions…..

Centripetal F = mr(omegaSqd), where v=romega
substituting gives F=mr(v2/r2), so F=mv2/r
using metric, F=25×36/0.4=2250N…..225kg…..so yep youre right…..with your assumptions!

however, 2500rpm is v=romega=0.4x2500x2pi=6282rad/min=104.7rad/sec…..cant be bothered!!!