Anyone have any experience-comments on UHS spinners. Looking to possibly get an 8-9" UHS for 72" IVO Med GA 582-C. Thanks !
Anyone have any experience-comments on UHS spinners. Looking to possibly get an 8-9" UHS for 72" IVO Med GA 582-C. Thanks !
Ty,
I have a UHS fiberglass spinner on our Kitfox. Painted to match the plane. It has worked out fine - no problems with balance, etc. They are balanced as a unit (Bulkhead and cone) at the factory as I understand it. Certainly easy to trim to length. A person should be careful not to overtorque the screws which hold the cone to the bulkhead- factory recommends using blue locktite on the screws.
Sincerely,
Dave S
KF 7 Trigear
912ULS Warp Drive
Do you have "in flight adjust"? I tried two "UHS 9P" spinners(one for 2 blade, one for 3 blade) on a medium with "in flight adjust" and while it worked in general there were problems with the back plate warping. The 9P is extra long to accommodate the adjustment motor so any change was really obvious as wobbling at the tip. The "back" plate goes forward of the adjustment motor(at least that was the design when I was going through this). As you torque the six prop bolts the fiberglass warped even with extra wide washers and threw the spinner off center. Did it work...? yes, but not ideal and could have been a problem down the line. I imagine a squash plate would help, but that meant more weight up front and even longer prop bolts. Perhaps the ground adjust version allows the back plate to be placed behind the hub effectively creating a squash plate effect. I ended up changing to a Kiev for moment of inertia and weight reasons anyways so don't know how the condition would contribute to longevity. It also kinda scared me that the IVO is pretty specific on torque and relies on the knurled plates to grip the blades. Throw some fiberglass into the sandwich and you could have some torque changes with compression. Maybe I was over worried, but food for thought.
Last edited by Geowitz; 02-11-2016 at 02:55 PM.
Ty,
I should have mentioned......on our S7 we have a ground adjustable warp drive prop and there is a 1/4" squash plate on top of the bulkhead. That may make a difference as Geowitz mentioned. I don't think the fender washers alone on top of the fiberglass bulkhead would be adequate. So our propshaft stack includes: Spacer, prop hub, bulkhead, squash plate, fender washers, AN washers, Bolts - this assembly has been stable.
Dave S
Thanks guys appreciate the info. UHS advised I use a 9p which does not seem right for the 582 72" Ivo 2 blade medium ground adjust with standard Ivo hub set-up. The 9p looks better suited for the IFA Ivo on a smooth cowl plane.
Ty
I had a problem with my UHS back plate. The fiberglass compressed each time I torqued the prop bolts and then loosened. This allowed the prop to operate below the specified torque, resulting in a crack in the prop blade from the bolt hole (two blade IVO). Since that time I'm running bare (well, no spinner anyway).
-- Paul S
Model III SN910
582 IVO Med
If you’re looking for a quality spinner I’d recommend Whirlwind. They are carbon fiber and much stronger than the fiberglass ones. I have the 9.75” from Whirlwind and the craftsmanship is exceptional. The backplate is also carbon fiber and won’t crush or warp. UHS may be fine, but you get what you pay for.
I bought a UHS. I broke it during install. I sent it back and they couldn't fix it. They sent me a new one and charged me. I got 8 of the 9 screws in the spinner, but the 9th screw hole needed to be tapped. I bought a tap and die set and learned how to do that too. Im 400 plus dollars into a SPINNER! oh, did I say that it needs to be sanded and painted because the primer has a little run in the paint.
No, UHS does not get my vote and yes, i'm telling the distributor.
I'll add that my whirlwind spinner arrived in beautiful finish. I then proceeded to paint it and polish it. Finally, I dropped it onto the pavement from about three feet, it hit right onto the tip. Not a mar one.
Eddie Forward
Flying
SS7, 912iS, Garmin G3X
Reviving an old thread. I called UHS and asked about delivery time for a spinner and was quoted 2 weeks. I'm well past 4 weeks and still nothing. The guy I bought it thru keeps calling and isn't getting any info from UHS. Is anybody here friends with the guy who owns UHS? Is he not well or is he just overpromising? I tried calling yesterday and today and got their voice mail. This is our prime flying season and I hate flying without one. I need a spinner and I'm open to any alternate suggestions. I have an IFA adjustable IVO prop on a Rotax 912ULS.
Thanks!
Dave
KitFox 6 Taildragger
912 ULS
Whirlwind 70” Prop
Garmin G3x
All around nice guy