RE: Wheels Spinners

regards stabilising fins on wheels. if you had one, to stop the wheel spinning, it would cease wheel spin, but would also place undue strain on the axle of the wheel, since of course anything like a fin-even plate shapes, will generate lift at speed, thus having the tendancy, through the lifts resultant force, to push the wheel upwards, and coincedentally inwards.

if you had spoked fins on the wheel hubs, you would get a water wheel effect, much the same way as axial flow compressor turbines work, because the air would cascade through the spokes, bringing with it, different areas of high/low pressure, promoting centripetal motion, ok at some point the air would be going soo fast as to stop the wheel hub spinning.

the wheels in either of these configurations would increase drag, and therefore absorb more energy, increasing take off runs. the wheel does rotate slowly when lowered inflight because of the airflow, but this is not significant enough, as would be with stabilising fins to cause drag problems.

it is almost a good idea to have your wheels spinning slowly- but not stationary, when you land because, on touch down the wheels will absorb some energy in accelerating to the speed of the aircraft, in effect HELPING to slow it down. fin stabilised wheels would be very hard to balance due to varying airflows over the fuselage and imperfections in weight and construction, during manufacturing!!

if you really want motionless wheels on touch down, why not have a microswitch, as is done with weapons arming and even radar activation on some aircraft that keeps the wheel brakes engaged until 1kg of upward force is felt on the wheels, activating the microswitch which disengages the brakes. this will not affect the aircrafts aerodynamic performance while giving the desired result.

coanda

RE: Is this too close for warbirds ?

good point, if it was the wing of the wildcat, then there would also be a discernable shadow cast on the fuse of the sky raider, as suggested it is the horizontal stabiliser of the sky raider, which is casting the shadow on the sky raider fuse. obviously we do not know what time of day ,and on what compass bearing that the formation was flying, but it is my prediction that the sun was shining from the top right of the photograph, and facing the aircraft, we would prob see the sun at a mid to high two o clock position, but not low, because the angle of the shadow is quite large, from the horizontal stabiliser, and if the sun was very high, this angle would be even larger, almost pointing straight down. the angle at which the photograph was taken could also be misleading, as to the composition of th formation, since a photograph taken at a high angle from the normal, ie, horizontal axis of the aircraft would place the aircraft at a misleading position within the lense.

it is normal practice for aircraft to formate stepped down from the leader, because the airflow beneath the wing is much more stable than that above it, which could contain vortices and patches of very turbulent air, thus making it extremely difficult to fly accurately.

coanda

RE: A little something for everyone?

hi!

there is a hastings at cosford and the camouflaged, fighter nose, canberra is at cosford too if memory serves me right.

RE: A little something for everyone?

of course it was danish doh!!!!

the delta at the front was a proof of concept design, and isnt as big as it looks- just the camera angle. I THINK its a BAC aircraft- although i cant remember for sure off the top of my head silly really since i’ve seen it about 8 times!! cosford is my local museum. its to test slow speed delta wing shapes if memory serves me right- i dont think barnes wallis designed it.

coanda

RE: US spying on China, naaahhhh!

this, i think is the nxet serious threat to stability over the world, frankly i think that one day they’re gonna push north korea into attacking south korea- and then its all gonna go to rat sh!t.

coanda

RE: See if you can guess what these are!!!

and these…..????????????????/

http://www.gkn-whl.co.uk/history_pterodactyl_4.html

http://www.gkn-whl.co.uk/history_pterodactyl_5.html

http://www.gkn-whl.co.uk/history_dreadnought.html

http://www.gkn-whl.co.uk/history_welkin.html

http://www.gkn-whl.co.uk/history_wyvern1.html

ok so no mystery but interesting aircraft all the same!!!

coanda

RE: WWII Air-Sea Pilot Resque

you will also find that defiants and spitfires were used to drop dinghy’s to downed airmen in the channel, on searches, i think lysanders too.

coanda