The F1 -535 White Knight revealed

Bartman

Welcome to MultiRotorForums.com!!
so Denny,
how would you explain the differences in measured current in Charlie's test with and without the prop shroud?
 

DennyR

Active Member
Bart
I cant explain what Charlie is doing with his own test evaluations. What I can say is that I have a test rig that gives very accurate results. As the bell mouth is an obvious experiment for anyone with a little knowledge of aerodynamics it was done to death here. In fact if you look at the machines that I used in the Wookgong M entry video you will see it had bellmouth surrounds. It had other devices that also improved lift efficiency and as time went on they were all stripped out due to the fact that they were not providing an overall improvement. Theory is one thing. Results are something else. Ask Mclaren what happens if you get the aerodynamic concept wrong at the start of the 2011 season.

This years F1 design is the culmination of many prototypes and evaluation vehicles to produce a machine that is specifically designed to lift and steer a camera in the most stable and efficient way. It also employs a safety feature, which I feel sure, will one day become mandatory.

It may not be what many people have come to expect. It is not the heavy lift OKto or Hexa that has formed a "Looks Right" image in most peoples minds. I could bang on about why this is a more advanced solution but I will let the videos do the talking. If it ever stops raining and blowing a gale.
 
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Denny, Just like you I have experimented many times with ducts, bellmouths and other lift augmenters, I can assure you they do work. If you are ever in the UK I will be happy to show you and prove it. I don't want to get into a debate about it.
 

DennyR

Active Member
Charlie

All I can say is good luck with it. If you can get 30% then I should contact all of the major aircraft manufacturers. you will become very rich.

Here is a large quad with four bellmouths, these are actually refined ones that give better performance in a crosswind yet I took then off!!!

I have a bellmouth on the tailpipe of my gas turbine and it works well enough to drive the tailpipe forward against the frictional losses in the pipe. But the velocity is over 600 mph.
 
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Denny, my jet, an SU27 has two tailpipes !, but check your physics, this an Aspirator working on the Venturi effect not a bellmouth.

The major manufacturers have tried it, there are many examples. The problem with full size aircraft is that the bellmouth is large and heavy and defeats it's benefits. In our world of the small it can be beneficial. The offer stands.
 

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