George Lendich wrote:
Man - that really does look impressive in solid.
very close Paul - so close in fact, it doesn't matter, from my point
of
view.
So did your system give an idea of weight ?
George (down under)
I was not able to construct a perfect solid so I was not able to
get a volume calculation. I might be able to get the big part less
the ribs and flanges. I'll give that a try.
Paul Lamar
I get 14.6 pounds George not counting the ribs. This includes the
bell and the mounting flange. This is un machined of course. I
weighed a stock die cast second gen turbo manual TX bell housing
again today and it was eight pounds with nothing cut out
of the center. Carbon fiber is looking better and better.
BTW Butch the 3D is 18.2 inches wide and George's PSRU mounting
bosses are on a 6.02 inch radius. I used your drawing lines as the
basis for the 3D. Your drawing was super imposed over the 3D front
view so if things are off your drawing was not to scale.
Paul Lamar
Paul,
That's interesting as I calculated that it would weigh approx 9 lbs after
machining - given the prototype has a lot of weight in the internal
stand-offs and internal stiffening ribs which I calculated weighted 4 to 5
lbs.
The prototype weighed in just over 13 lbs after machining and 15 lbs raw.
Also the prototype was thicker in some areas, than it needed to be.
I guess only time will tell - but I was hoping for better news!!
Thanks for that feed -back.
George (down under)
I may have been a bit high on the wall thickness of the large
diameter cylindrical part of the bell 3D. The front face is right
on the money at .2 inches thick.
Paul Lamar
The AirCraft Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/
Copyright 1998-2003 All world wide rights reserved.