# Latest **URL:** https://sonexpilots.org/latest.md [Latest](https://sonexpilots.org/latest.md) · [Categories](https://sonexpilots.org/categories.md) · [Tags](https://sonexpilots.org/tags.md) --- ## [Welcome to SonexPilots.org! 👋](https://sonexpilots.org/t/welcome-to-sonexpilots-org/5)
**Author:** [@Badger830](https://sonexpilots.org/u/Badger830)\ **Replies:** 0\ **Last updated:** [May 1, 2025, 6:22pm UTC](https://sonexpilots.org/t/welcome-to-sonexpilots-org/5 "2025-05-01T18:22:03Z")
Welcome everyone to the Sonex Pilots Forum. I hope this community can be just as helpful as the previous one. While the layout is different than the old forum, I hope this new format will be easier to use (especially for… --- ## [Sonex Legacy SN0435](https://sonexpilots.org/t/sonex-legacy-sn0435/6054)
**Author:** [@e.k.1.2](https://sonexpilots.org/u/e.k.1.2)\ **Replies:** 11\ **Last updated:** [September 24, 2026, 6:36pm UTC](https://sonexpilots.org/t/sonex-legacy-sn0435/6054 "2026-09-24T18:36:38Z")
Hi everyone, I am the 3rd owner of Sonex Legacy SN0435. I have a private build log on the EAA site that I’ll use to track my time, expenses and serve as my official log, but I’ll also track progress here. I know there a… --- ## [N830EH - First Flight](https://sonexpilots.org/t/n830eh-first-flight/6056)
**Author:** [@Badger830](https://sonexpilots.org/u/Badger830)\ **Replies:** 16\ **Last updated:** [September 24, 2026, 1:55pm UTC](https://sonexpilots.org/t/n830eh-first-flight/6056 "2026-09-24T13:55:50Z")
After 2.5 years, 1,229 hours, and about 9,014 rivets, I am happy to announce that Sonex 0849B has joined the “Completed Sonex Club”. Her first flight was this morning and was enjoyably uneventful for a first flight. The … --- ## [Highwing Build - dreynol](https://sonexpilots.org/t/highwing-build-dreynol/5442)
**Author:** [@dreynol](https://sonexpilots.org/u/dreynol)\ **Replies:** 56\ **Last updated:** [September 24, 2026, 1:07pm UTC](https://sonexpilots.org/t/highwing-build-dreynol/5442 "2026-09-24T13:07:01Z")
Just placed an order for a tail kit! I’ll update this thread as the build progresses --- ## [Sonex Stephen Osborne on SocialFlight Live - 9/8/26 8pm Eastern](https://sonexpilots.org/t/sonex-stephen-osborne-on-socialflight-live-9-8-26-8pm-eastern/5967)
**Author:** [@ysifly2](https://sonexpilots.org/u/ysifly2)\ **Replies:** 13\ **Last updated:** [September 23, 2026, 11:42pm UTC](https://sonexpilots.org/t/sonex-stephen-osborne-on-socialflight-live-9-8-26-8pm-eastern/5967 "2026-09-23T23:42:21Z")
--- ## [VeeCU Installation](https://sonexpilots.org/t/veecu-installation/5204)
**Author:** [@WesRagle](https://sonexpilots.org/u/WesRagle)\ **Replies:** 44\ **Last updated:** [September 23, 2026, 6:35pm UTC](https://sonexpilots.org/t/veecu-installation/5204 "2026-09-23T18:35:53Z")
Hi Guys, I started this thread to help keep track of the parts, and sources for those parts, while installing the VeeCU on Onex #89. This post will be edited as more components are sourced. The VeeCU: Alcohol tole… --- ## [Tach signal with B&C PMR1D regulator](https://sonexpilots.org/t/tach-signal-with-b-c-pmr1d-regulator/5928)
**Author:** [@Johnvon](https://sonexpilots.org/u/Johnvon)\ **Replies:** 3\ **Last updated:** [September 23, 2026, 6:13pm UTC](https://sonexpilots.org/t/tach-signal-with-b-c-pmr1d-regulator/5928 "2026-09-23T18:13:36Z")
The B&C PMR1D regulator is performing great, Odyssey battery staying charged as it should. Now I see the forementioned issue with the tach signal not being consistent. I am sampling from one lead of the stator. I am u… --- ## [Sonex/Waiex/Xenos Installations](https://sonexpilots.org/t/sonex-waiex-xenos-installations/6033)
**Author:** [@cooperaircraftcorp](https://sonexpilots.org/u/cooperaircraftcorp)\ **Replies:** 5\ **Last updated:** [September 23, 2026, 3:10pm UTC](https://sonexpilots.org/t/sonex-waiex-xenos-installations/6033 "2026-09-23T15:10:19Z")
--- ## [Onex Installations](https://sonexpilots.org/t/onex-installations/6032)
**Author:** [@cooperaircraftcorp](https://sonexpilots.org/u/cooperaircraftcorp)\ **Replies:** 7\ **Last updated:** [September 23, 2026, 1:10am UTC](https://sonexpilots.org/t/onex-installations/6032 "2026-09-23T01:10:55Z")
--- ## [Jabiru 2200,3300 upgrade alternator](https://sonexpilots.org/t/jabiru-2200-3300-upgrade-alternator/6053)
**Author:** [@WaiexN143NM](https://sonexpilots.org/u/WaiexN143NM)\ **Replies:** 0\ **Last updated:** [September 22, 2026, 11:33pm UTC](https://sonexpilots.org/t/jabiru-2200-3300-upgrade-alternator/6053 "2026-09-22T23:33:02Z")
Hi all, just a quick note, i was in contact w paul owner rotec , prior to oskosh 2026, then at airventure in person. I was able to get some pdf manuels camit aero engines, of the alternate alternator upgrade for sonex … --- ## [I Did Transition Training With Jeff Schultz](https://sonexpilots.org/t/i-did-transition-training-with-jeff-schultz/6044)
**Author:** [@4redwings](https://sonexpilots.org/u/4redwings)\ **Replies:** 4\ **Last updated:** [September 22, 2026, 7:35pm UTC](https://sonexpilots.org/t/i-did-transition-training-with-jeff-schultz/6044 "2026-09-22T19:35:09Z")
Continuing the discussion from Transistion Training in KC: I got transition training with Jeff Schultz last weekend in his Sonex outside Kansas City. I have many thousands of hours of flying time including fighters and… --- ## [Electric Flap Motor Potentiometer](https://sonexpilots.org/t/electric-flap-motor-potentiometer/6046)
**Author:** [@williamabatten](https://sonexpilots.org/u/williamabatten)\ **Replies:** 5\ **Last updated:** [September 22, 2026, 10:40am UTC](https://sonexpilots.org/t/electric-flap-motor-potentiometer/6046 "2026-09-22T10:40:21Z")
First I want to say that this sounds really strange - I agree. I have an MGL Gen 3 iEFIS Lite, SP-10 Flap controller, and a rotary switch on the IP for the flap position - 0, 10, 20 & 30 degrees. I have 65 hours on my W… --- ## [Sonex Highwing Update: Preliminary Data](https://sonexpilots.org/t/sonex-highwing-update-preliminary-data/4844)
**Author:** [@dreynol](https://sonexpilots.org/u/dreynol)\ **Replies:** 5\ **Last updated:** [September 21, 2026, 4:31pm UTC](https://sonexpilots.org/t/sonex-highwing-update-preliminary-data/4844 "2026-09-21T16:31:27Z")
--- ## [Flying cross country](https://sonexpilots.org/t/flying-cross-country/6047)
**Author:** [@The\_Flying\_Squirrel](https://sonexpilots.org/u/The_Flying_Squirrel)\ **Replies:** 0\ **Last updated:** [September 20, 2026, 10:05pm UTC](https://sonexpilots.org/t/flying-cross-country/6047 "2026-09-20T22:05:46Z")
Just landed at Salem Municipal airport. Helping a friend fly his Maule back from Virginia. At the airport is N44SX. Good to see another Sonex! --- ## [Hello from KY](https://sonexpilots.org/t/hello-from-ky/6043)
**Author:** [@e.k.1.2](https://sonexpilots.org/u/e.k.1.2)\ **Replies:** 10\ **Last updated:** [September 19, 2026, 12:07pm UTC](https://sonexpilots.org/t/hello-from-ky/6043 "2026-09-19T12:07:55Z")
Hello everyone, I recently purchased a Sonex legacy kit from another builder. I have been lurking here and the old site for many years. There are so many knowledgeable folks here. I will post here as I go and I am 100% … --- ## [Cotton Sonerai](https://sonexpilots.org/t/cotton-sonerai/5977)
**Author:** [@Bryan\_Cotton](https://sonexpilots.org/u/Bryan_Cotton)\ **Replies:** 9\ **Last updated:** [September 19, 2026, 11:54am UTC](https://sonexpilots.org/t/cotton-sonerai/5977 "2026-09-19T11:54:29Z")
Since I requested this section, I thought I should christen it. So I have too many projects, and not enough space. I also have a chain hoist I bought when I was a teenager, near the end of the dinosaur era. It’s not been… --- ## [The 26/27 Sept Sonex Fly-In Columbus IN - KBAK](https://sonexpilots.org/t/the-26-27-sept-sonex-fly-in-columbus-in-kbak/6042)
**Author:** [@JFYrineo](https://sonexpilots.org/u/JFYrineo)\ **Replies:** 8\ **Last updated:** [September 19, 2026, 11:53am UTC](https://sonexpilots.org/t/the-26-27-sept-sonex-fly-in-columbus-in-kbak/6042 "2026-09-19T11:53:19Z")
A quick update for our upcoming Sonex Fly-In Sat/Sun the 26th & 27th of September. As of now the weather looks to be shaping up nicely! We will setup airplane parking and camping as highlighted in the map below. On Satu… --- ## [Sonex Legacy (Model A)](https://sonexpilots.org/t/sonex-legacy-model-a/6041)
**Author:** [@T755](https://sonexpilots.org/u/T755)\ **Replies:** 1\ **Last updated:** [September 19, 2026, 11:49am UTC](https://sonexpilots.org/t/sonex-legacy-model-a/6041 "2026-09-19T11:49:28Z")
Legacy.pdf (2.1 MB) --- ## [Cotton Waiex](https://sonexpilots.org/t/cotton-waiex/5033)
**Author:** [@Bryan\_Cotton](https://sonexpilots.org/u/Bryan_Cotton)\ **Replies:** 209\ **Last updated:** [September 19, 2026, 11:47am UTC](https://sonexpilots.org/t/cotton-waiex/5033 "2026-09-19T11:47:09Z")
We have been down for maintenance since May. Worked through some oil temperature and pressure issues and did our first 2-up flight over the airport. Shortly after this picture was taken, voltage went over 15. The EarthX … --- ## [Legacy Sonex 0414](https://sonexpilots.org/t/legacy-sonex-0414/2860)
**Author:** [@JKS](https://sonexpilots.org/u/JKS)\ **Replies:** 50\ **Last updated:** [September 18, 2026, 3:47pm UTC](https://sonexpilots.org/t/legacy-sonex-0414/2860 "2026-09-18T15:47:28Z")
Here we go again. again --- ## [Secondary Ignition trouble](https://sonexpilots.org/t/secondary-ignition-trouble/5356)
**Author:** [@Karmarepair](https://sonexpilots.org/u/Karmarepair)\ **Replies:** 21\ **Last updated:** [September 17, 2026, 8:10pm UTC](https://sonexpilots.org/t/secondary-ignition-trouble/5356 "2026-09-17T20:10:31Z")
When I switch from my SDS coil pack ignition to the AeroVee secondary, the rpm drop is 4-500 rpm. I changed the plugs. I checked the secondary resistance, it’s about 13,000 ohm. I’m a little puzzled how to check secondar… --- ## [Sonex Squadron 1.3](https://sonexpilots.org/t/sonex-squadron-1-3/5926)
**Author:** [@JKS](https://sonexpilots.org/u/JKS)\ **Replies:** 1\ **Last updated:** [September 16, 2026, 11:26pm UTC](https://sonexpilots.org/t/sonex-squadron-1-3/5926 "2026-09-16T23:26:46Z")
I was thinking about a Sonex Squadron insignia. So I downloaded GIMP and startyed playing with it. Getting close. --- ## [Phoenix Installations](https://sonexpilots.org/t/phoenix-installations/6034)
**Author:** [@cooperaircraftcorp](https://sonexpilots.org/u/cooperaircraftcorp)\ **Replies:** 0\ **Last updated:** [September 16, 2026, 2:58am UTC](https://sonexpilots.org/t/phoenix-installations/6034 "2026-09-16T02:58:08Z")
Hello everyone, We created this thread for Phoenix builders to share their build progress, ask/answer questions, provide feedback and anything else on the subject. Enjoy! --- ## [Corvair 2850 / 110 HP Onex Forewall Forward Package](https://sonexpilots.org/t/corvair-2850-110-hp-onex-forewall-forward-package/5980)
**Author:** [@Jeffa](https://sonexpilots.org/u/Jeffa)\ **Replies:** 1\ **Last updated:** [September 15, 2026, 10:51pm UTC](https://sonexpilots.org/t/corvair-2850-110-hp-onex-forewall-forward-package/5980 "2026-09-15T22:51:49Z")
I’m taking on a partner in my Onex and we are going to install an engine with more power in my modified airframe. So, the current firewall forward install is for sale. Sale includes: 2850 engine. 200 hrs on bottom en… --- ## [Bing 40mm Carburetor model 64 CV for sale](https://sonexpilots.org/t/bing-40mm-carburetor-model-64-cv-for-sale/6031)
**Author:** [@Airgus](https://sonexpilots.org/u/Airgus)\ **Replies:** 0\ **Last updated:** [September 15, 2026, 8:32pm UTC](https://sonexpilots.org/t/bing-40mm-carburetor-model-64-cv-for-sale/6031 "2026-09-15T20:32:54Z")
Used 40mm Bing carb from a Jabiru 3300. The engravings on the body indicate Serial Nr.? 19071, also Needle size M255 N285, Model? 4A/39A0D-1. The carburetor is clean, all parts move freely and seems to be fully function… --- ## [Rotec TBI-MK.II 40-S throttle body injector](https://sonexpilots.org/t/rotec-tbi-mk-ii-40-s-throttle-body-injector/5988)
**Author:** [@Airgus](https://sonexpilots.org/u/Airgus)\ **Replies:** 4\ **Last updated:** [September 15, 2026, 12:58pm UTC](https://sonexpilots.org/t/rotec-tbi-mk-ii-40-s-throttle-body-injector/5988 "2026-09-15T12:58:34Z")
I inherited this cab with a used Jabiru 3300 I purchased. It is in very good condition, however I strongly recommend a qualified technician to go through it before installation in an aircraft. If nee… --- ## [Problem with Secondary ignition](https://sonexpilots.org/t/problem-with-secondary-ignition/927)
**Author:** [@ArchiveBot](https://sonexpilots.org/u/ArchiveBot)\ **Replies:** 5\ **Last updated:** [September 15, 2026, 2:04am UTC](https://sonexpilots.org/t/problem-with-secondary-ignition/927 "2026-09-15T02:04:46Z")
Problem with Secondary ignition… Posted: Thu Feb 15, 2024 6:34 pm by sonex1020x Hi all ! George in Utah here flying legacy Sonex 1020 and Aerovee #356 normally aspirated. At runup the other day, noticed a larger RPM dr… --- ## [High oil temps Hummel engine](https://sonexpilots.org/t/high-oil-temps-hummel-engine/5965)
**Author:** [@onexmike](https://sonexpilots.org/u/onexmike)\ **Replies:** 6\ **Last updated:** [September 14, 2026, 11:22am UTC](https://sonexpilots.org/t/high-oil-temps-hummel-engine/5965 "2026-09-14T11:22:12Z")
There was a earlier discussion about high oil temps in a 2400cc Hummel engine that went a bit sideways. I decided to ask Valvoline oil company what the optimum temp of the Valvoline VR1 Racing 20w-50 oil is when paired … --- ## [Builders Map](https://sonexpilots.org/t/builders-map/5968)
**Author:** [@702onex](https://sonexpilots.org/u/702onex)\ **Replies:** 11\ **Last updated:** [September 11, 2026, 1:58pm UTC](https://sonexpilots.org/t/builders-map/5968 "2026-09-11T13:58:48Z")
It’s so nice that this new Sonex Pilots forum carried on from the old Sonex Builders forum. The new forum is so much more modern and easy to use. One thing I miss about the old forum was the builders map that showed who … --- ## [Hotter sparkplugs](https://sonexpilots.org/t/hotter-sparkplugs/5976)
**Author:** [@AlexZ](https://sonexpilots.org/u/AlexZ)\ **Replies:** 2\ **Last updated:** [September 10, 2026, 3:40pm UTC](https://sonexpilots.org/t/hotter-sparkplugs/5976 "2026-09-10T15:40:33Z")
After a long battle with a broken alternator and secondary ignition(trigger magnet) I’m trying to gain confidence in the Aerovee again. I lost that a bit when in one flight the alternator and the secondary ignition both … [Next page](https://sonexpilots.org/latest.md?page=1)