# Corvair Onex Prop **URL:** \ **Category:** Propellers\ **Created:** [December 3, 2025, 3:42am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244 "2025-12-03T03:42:25Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Jeffa](https://sonexpilots.org/letter_avatar_proxy/v4/letter/j/bc79bd/32.png) [@Jeffa](https://sonexpilots.org/u/Jeffa)\ **Post date:** [December 3, 2025, 3:42am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/1 "2025-12-03T03:42:25Z")
Still looking for a better prop for my Corvair 2850 powered Onex . Current Sensenich 54x58 has too much pitch. I would like to see another 250 rpm across the rpm range. I lengthened the landing gear and can use up to 60-61’ diameter. Anyone have anything for sale? Thanks, Jeff ![IMG_1914](https://sonexpilots.org/uploads/default/original/2X/9/9aa5f7aabfd8207810f303b446ac50743d512e72.jpeg) ---
**Author:** ![WesRagle](https://sonexpilots.org/user_avatar/sonexpilots.org/wesragle/32/1450_2.png) [@WesRagle](https://sonexpilots.org/u/WesRagle)\ **Post date:** [December 3, 2025, 4:57am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/2 "2025-12-03T04:57:09Z")
Hey Jeff, I can’t help with a prop. Wish I could. But I just have to say: **That is the coolest looking Onex I’ve ever seen.** I’m going to have to cut the sides of my cowl when I install EFI on the VW. I’ll have to add cheeks. I’ve done very little fiberglass work. If you could point me to a resource that would provide guidance on how you did that it would be greatly appreciated. Wes ---
**Author:** ![Jeffa](https://sonexpilots.org/letter_avatar_proxy/v4/letter/j/bc79bd/32.png) [@Jeffa](https://sonexpilots.org/u/Jeffa)\ **Post date:** [December 3, 2025, 4:52pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/3 "2025-12-03T16:52:07Z")
Wes, a friend who runs his own composite shop lofted the teardrop shapes in CAD, then used a CNC table to make one-time use molds using pink foam. I then laid up 4 layers of bid into the molds, using 7725 style BID cloth and epoxy resin. Lots more work to then section the shapes with split lines/flanges at the firewall and upper/lower cowl split lines Jeff ---
**Author:** ![Bryan\_Cotton](https://sonexpilots.org/user_avatar/sonexpilots.org/bryan_cotton/32/760_2.png) [@Bryan\_Cotton](https://sonexpilots.org/u/Bryan_Cotton)\ **Post date:** [December 3, 2025, 5:00pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/4 "2025-12-03T17:00:03Z")
I agree with Wes. That is awesome Jeff! ---
**Author:** ![WesRagle](https://sonexpilots.org/user_avatar/sonexpilots.org/wesragle/32/1450_2.png) [@WesRagle](https://sonexpilots.org/u/WesRagle)\ **Post date:** [December 3, 2025, 5:05pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/5 "2025-12-03T17:05:23Z")
> [@Jeffa](#): > > Wes, a friend who runs his own composite shop lofted the teardrop shapes in CAD, then used a CNC table to make one-time use molds using pink foam. I then laid up 4 layers of bid into the molds, using 7725 style BID cloth and epoxy resin. Lots more work to then section the shapes with split lines/flanges at the firewall and upper/lower cowl split lines Thanks Jeff, I think I need a better class of friends 😉 Wes ---
**Author:** ![Bryan\_Cotton](https://sonexpilots.org/user_avatar/sonexpilots.org/bryan_cotton/32/760_2.png) [@Bryan\_Cotton](https://sonexpilots.org/u/Bryan_Cotton)\ **Post date:** [December 3, 2025, 7:42pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/6 "2025-12-03T19:42:27Z")
I’ve got a buddy out in PA who has Waiex 181 with a Corvair on it. 54x54 Sensenich and he’s happy with it. ---
**Author:** ![sonex1517](https://sonexpilots.org/user_avatar/sonexpilots.org/sonex1517/32/609_2.png) [@sonex1517](https://sonexpilots.org/u/sonex1517)\ **Post date:** [December 3, 2025, 11:45pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/7 "2025-12-03T23:45:58Z")
Yowza! That is just an amazing Onex!!! I imagine it performs more like a rocket! ---
**Author:** ![daleandee](https://sonexpilots.org/user_avatar/sonexpilots.org/daleandee/32/942_2.png) [@daleandee](https://sonexpilots.org/u/daleandee)\ **Post date:** [December 4, 2025, 12:30am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/8 "2025-12-04T00:30:10Z")
I agree with the others … _dat dar beez one fine lookin’ aeroplane fer sure!_ Dale 3.0 Corvair/Taildragger ---
**Author:** ![Jeffa](https://sonexpilots.org/letter_avatar_proxy/v4/letter/j/bc79bd/32.png) [@Jeffa](https://sonexpilots.org/u/Jeffa)\ **Post date:** [January 2, 2026, 4:33pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/9 "2026-01-02T16:33:01Z")
Thanks for the nice comments! Jeff ---
**Author:** ![Jeffa](https://sonexpilots.org/letter_avatar_proxy/v4/letter/j/bc79bd/32.png) [@Jeffa](https://sonexpilots.org/u/Jeffa)\ **Post date:** [January 18, 2026, 5:41pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/10 "2026-01-18T17:41:39Z")
Has anyone flown a Corvair powered Sonex with the Sensenich ground adjustable prop? Looks like they are 60-61” diameter. Considering this as an option, curious as to how it would perform on my plane (2850 OneX). Jeff ---
**Author:** ![Bryan\_Cotton](https://sonexpilots.org/user_avatar/sonexpilots.org/bryan_cotton/32/760_2.png) [@Bryan\_Cotton](https://sonexpilots.org/u/Bryan_Cotton)\ **Post date:** [January 18, 2026, 6:53pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/11 "2026-01-18T18:53:48Z")
My understanding of the Corvair is they run higher RPM, like the AeroVee. That would make for a bad match with a large prop. The bigger diameter props make more sense in a Lycoming or Continental application where the RPMs are low. At 3400 RPM , a 54” prop will see a tip speed of about 800 fps. Speed of sound at sea level is a little over 1100 fps. With a 60” prop you are going to be approaching 900 fps. ---
**Author:** ![Kevin\_Conklin](https://sonexpilots.org/user_avatar/sonexpilots.org/kevin_conklin/32/1720_2.png) [@Kevin\_Conklin](https://sonexpilots.org/u/Kevin_Conklin)\ **Post date:** [January 19, 2026, 1:26am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/12 "2026-01-19T01:26:21Z")
Would that be Billy? ---
**Author:** ![Bryan\_Cotton](https://sonexpilots.org/user_avatar/sonexpilots.org/bryan_cotton/32/760_2.png) [@Bryan\_Cotton](https://sonexpilots.org/u/Bryan_Cotton)\ **Post date:** [January 19, 2026, 1:48am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/13 "2026-01-19T01:48:13Z")
Tony [![](https://sonexpilots.org/uploads/default/original/2X/a/a53ee3d5e9bb2cee8a57ab1a285a1d4c4d35eef6.jpeg "Waiex #0181 First Flight") ](https://www.youtube.com/watch?v=JrhZ0Qy6e3s) ---
**Author:** ![Bryan\_Cotton](https://sonexpilots.org/user_avatar/sonexpilots.org/bryan_cotton/32/760_2.png) [@Bryan\_Cotton](https://sonexpilots.org/u/Bryan_Cotton)\ **Post date:** [January 19, 2026, 2:31am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/14 "2026-01-19T02:31:04Z")
Tony reports 135 kias at 3250 RPM, well below WOT. ---
**Author:** ![SkippyDiesel](https://sonexpilots.org/letter_avatar_proxy/v4/letter/s/9f8e36/32.png) [@SkippyDiesel](https://sonexpilots.org/u/SkippyDiesel)\ **Post date:** [January 25, 2026, 3:13am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/15 "2026-01-25T03:13:17Z")
What is the engine speed at WOT? AND What is the prop tip speed at WOT? 😈 ---
**Author:** ![Bryan\_Cotton](https://sonexpilots.org/user_avatar/sonexpilots.org/bryan_cotton/32/760_2.png) [@Bryan\_Cotton](https://sonexpilots.org/u/Bryan_Cotton)\ **Post date:** [January 25, 2026, 4:23am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/16 "2026-01-25T04:23:32Z")
I’m not sure he’s done a WOT run yet. IIRC max rpm for the Corvair is 3600. Prop diameter is 54”, or 137.16 cm, I’ll let you do the math so you get the units you like. ---
**Author:** ![SkippyDiesel](https://sonexpilots.org/letter_avatar_proxy/v4/letter/s/9f8e36/32.png) [@SkippyDiesel](https://sonexpilots.org/u/SkippyDiesel)\ **Post date:** [January 25, 2026, 5:26am UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/17 "2026-01-25T05:26:17Z")
848 FPS @ 3600 RPM This would seem to be well within the speed of sound barrier 1,116 FPS however its likly that efficiency has significantly reduced and noise increased. 😈 ---
**Author:** ![Jeffa](https://sonexpilots.org/letter_avatar_proxy/v4/letter/j/bc79bd/32.png) [@Jeffa](https://sonexpilots.org/u/Jeffa)\ **Post date:** [January 25, 2026, 5:21pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/18 "2026-01-25T17:21:43Z")
Curious as to prop pitch and engine displacement. Thanks, Jeff ---
**Author:** ![Bryan\_Cotton](https://sonexpilots.org/user_avatar/sonexpilots.org/bryan_cotton/32/760_2.png) [@Bryan\_Cotton](https://sonexpilots.org/u/Bryan_Cotton)\ **Post date:** [January 25, 2026, 5:33pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/19 "2026-01-25T17:33:52Z")
2275, 105HP, 54x54 Sensenich. ---
**Author:** ![Jeffa](https://sonexpilots.org/letter_avatar_proxy/v4/letter/j/bc79bd/32.png) [@Jeffa](https://sonexpilots.org/u/Jeffa)\ **Post date:** [January 25, 2026, 6:48pm UTC](https://sonexpilots.org/t/corvair-onex-prop/5244/20 "2026-01-25T18:48:29Z")
Thanks Bryan! Jeff [Next page](https://sonexpilots.org/t/corvair-onex-prop/5244.md?page=2)