... I have to dissagree with you. The UFO gyro from New Zealand is far better than the RAF, performace is far better, it is larger, it looks better, it is...
31616
Rene Arredondo
odacus
Feb 1, 2003 4:58 pm
Does anyone know what kind of tolerances need to be held on a cog for a belt drive? Do you think wire EDM could be used to make cogs? Thanks, Rene ... From:...
31617
Ray Leonard
flysprint
Feb 1, 2003 5:09 pm
... From the wire EDM parts I've seen, I believe it could. Rather expensive unless you have special access. Ray...
31618
Manning, Kerry
d55guy
Feb 1, 2003 5:42 pm
Does anyone have an idea of the weight of this PSRU? Kerry Manning Lead Engineer Adam Aircraft Industries 12876 E. Jamison Circle Englewood, CO 80112 ...
31619
Jim Mantyla
jbmantyla
Feb 1, 2003 8:38 pm
I suppose a wire EDM could be used, but from what i understand it doesn't work well with aluminum. Jim Mantyla ... From: "Rene Arredondo"...
31620
David James
austgrains
Feb 2, 2003 3:08 pm
... Since wire EDM machines are VERY acurate I would say yes. __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful....
31621
David James
austgrains
Feb 2, 2003 3:10 pm
... The RAF redrive is not well engineered, no support on the crankshaft end. __________________________________________________ Do you Yahoo!? Yahoo! Mail...
31622
Ray Leonard
flysprint
Feb 2, 2003 4:00 pm
... An improperly located support is worse than no support. The presence of a support does not guarantee a better, or more durable drive. Ray...
31623
Rene Arredondo
odacus
Feb 2, 2003 4:36 pm
I am going to EDM a thin (.25 inch in radial direction)donut of the outer cog surface in heat treated stainless steel. This donut will mount over an aluminum...
31624
Alfred Jungkind
wingkits@...
Feb 2, 2003 5:03 pm
Hello all ! Sad to let you know that a well-known instructor of Rotary Airforce got killed last week ; I saw his picture in front of his gyro in the Edmonton...
31625
Ken Welter
rotarycoot
Feb 2, 2003 6:07 pm
The way I make the pulleys for my redrive's is by machining the pulley out on a lathe and cutting the teeth on a gear hob, there are many gear hob shops that...
31626
Peter Stenabaugh
caddman@...
Feb 2, 2003 7:35 pm
Kerry: I just checked my brochure on the PSRU's and the RAF do not list the weight of the PSRU alone, only the complete engine package at 235 lbs. Send them...
31627
Peter Stenabaugh
caddman@...
Feb 2, 2003 7:53 pm
David: I believe I was yourself that is not in favor of the RAF redrive, due to the lack of rear support. Do you have another support in mind that you feel is...
31628
Clare Snyder
claresnyder
Feb 2, 2003 8:01 pm
There are many "well engineered" PSRUs where lower support bearings cause more problems than not having one. The crank runs on plain bearings. It has a...
31629
Alfred Jungkind
wingkits@...
Feb 3, 2003 1:08 am
Hi Friends ! Only people who KNOW how to align shafts, couplings etc. properly can appreciate how easy it is to make the situation worse with an outer , ...
31630
kennybauman <kenny...
kennybauman
Feb 3, 2003 1:10 am
Clare's got a very solid point on this. how to connect a drive to the engine seems to be one of the more problematic issues involved. the Marcotte method is...
31631
Alfred Jungkind
wingkits@...
Feb 3, 2003 1:17 am
Hi Ken ! Do you have the alu pullies hard anodized ? Alfred ... From: "Ken Welter" <rotary.coot@...> To: <airsoob@yahoogroups.com> Sent: Sunday,...
31632
Clare Snyder
claresnyder
Feb 3, 2003 1:51 am
My preference - which adds weight and complexity, is a lower sprocket on it's own shaft, coupled to the crank though a flex coupling of some sort. This is...
31633
budstor@...
budstor
Feb 3, 2003 6:28 am
Ken, How much to machine each cog? Can you cut an internal spline in them? Thanks, Bud...
31634
David James
austgrains
Feb 3, 2003 3:51 pm
... True but unless you are saying that all the drives with support are not correctly located that why state the obvious? It is not only possible to locate the...
31635
David James
austgrains
Feb 3, 2003 4:08 pm
... Hi Peter, no I dont off hand because I dont take much notice of belt drives preferring gear units myself. I have seen other belt drives that "Seem" better...
31636
David James
austgrains
Feb 3, 2003 4:19 pm
... Clare, if what you say is true and I have no reason to doubt it then they are NOT well engineered. The answer could seem to be a self aligning bearing,...
31637
Clare Snyder
claresnyder
Feb 3, 2003 4:33 pm
You show me a good outboard support design that does not decouple the sprocket load from the crank. I haven't seen it yet. ... From: "David James"...
31638
Clare Snyder
claresnyder
Feb 3, 2003 4:35 pm
BINGO! Give the man a star! ... From: "David James" <austgrains@...> To: <airsoob@yahoogroups.com> Sent: Monday, February 03, 2003 11:19 AM Subject: Re:...
31639
albert piccioni
adpiccioni@...
Feb 3, 2003 4:42 pm
I dont know which psru u are refering too,,,,,however i did weigh a belt drive 2;1 ratio for an ea 82,,,,, it weighed 65 pounds,,,,on a bathroom scale,,which i...
31640
Ray Leonard
flysprint
Feb 3, 2003 4:52 pm
... The problem with that approach is that the crankshaft does not run centered in the main bearings. When you force one end to run centered more load than is...
31641
moe113097 <moe1130...
moe113097
Feb 3, 2003 6:04 pm
Hi All, Well My ea81 runs great started it for the first time yesterday. I need to change my alternator pulley however, I'm looking for a v groove pulley that...
31642
Clare Snyder
claresnyder
Feb 3, 2003 6:06 pm
The problem with self aligning bearings is you STILL have movement in the mains - spec on Subaru EA81 is .010 to .030 (mm?) and the ball bearing has none. The...
31643
Ken Welter
rotarycoot
Feb 3, 2003 6:11 pm
Hi bud and Alfred Yes I do hard anodize the aluminum pulleys. As for the hobing and cutting splines, I send it out to a gear shop to have that done, if you...
31644
Ken Welter
rotarycoot
Feb 3, 2003 6:11 pm
I have not built a redrive for a soob yet but plan on trying one on my coot but I have found that the mazda ran smoother and developed more torque with a 16 lb...
