View Full Version : ULTRA-PROP

jon_curtis - n/a
8-Mar-06, 06:42 PM
This some might find interesting! the guy from competition aircraft actually recommends that a prop to asborb around 75hp to 100hp approx 1250mm in dia can be a multibladed prop (ok thats nothing wondeful) but he did recommend making the hub out of two alu disks and use eight blades! HAPPY HAPPY JOY JOY!

Ian Brooks - n/a
8-Mar-06, 08:07 PM

Sounds like a good plan - but the centripetal load on the hub would be significant, you might want to have a stress engineer review the design and/or arrange a "pull" test to demonstrate the integrity of the new hub. Otherwise you might have problems with scrutinering. Let me know if you have problems with the stressing, I may be able to help. (but it migth not be quick!)


GavinParson - n/a
9-Mar-06, 05:54 PM
The hub of Owen Wisemans Ivoprop is nothing more than two aluminium disks and it's taken over 100hp for the last 10 years with no problem.


Mike Lawton - n/a
9-Mar-06, 09:55 PM
Ian your a great bloke and you have helped me out in the past

but you crack me up where on earth do you get all these words from !!!!!! probably see you at Blackwater again


jon_curtis - n/a
10-Mar-06, 11:15 PM
http://www.geog.ucsb.edu/~joel/g110_w06/lecture_notes/rotati (http://www.geog.ucsb.edu/~joel/g110_w06/lecture_notes/rotating_motion/rotating_motion.html) ng_motion/rotating_motion.html

try getting your head around coriolis centripetal acceleration

Nick Long - n/a
11-Mar-06, 07:21 AM