Topic starter
New Stinson 108-3 owner here. Just bought the plane and flew it down to MO from MN. My Delco Generator quit charging on the way. I am going to try flashing the field today, but I was curious if anyone has information on an alternator conversion. I can’t find an STC except for the Franklin; I have a Continental O-470L in my -3.
Any assistance would be greatly appreciated!
-Taylor
Posted : 21/06/2022 12:50 pm
There are Alternators out there, but MOST were done on a Field Approval basis. There is NOT an STC that Im aware of that is living and ready to produce parts and paperwork.
Its one of the problems of many vintage aircraft, bc there is so few airframes, there is not an ROI in a company investing in an STC.
I have some alternators in my hangar and I want to install them but its going to be either a F.A. via the FAA
Posted : 21/06/2022 4:38 pm
Also as a new owner, welcome, please join the ISC website and we have lots of data in the files section for active members.
Posted : 21/06/2022 4:39 pm
@stinsono I thought the generator was an engine accessory? If you have an O-470 already, you should be able to find an approved alternator for that engine....
Posted : 21/06/2022 5:03 pm
Topic starter
@stinsono I joined the ISC about a month ago. Still going through all the stuff available on this site. Thanks for the info on alternators looks like I may have to work towards the F.A. route
Posted : 22/06/2022 1:54 am
Topic starter
@ecos36gmail-com I thought that may be the case. I bought the plane a couple days ago and had the generator quit charging on the flight home. I am going to field flash it and cross my fingers. In the meantime I need to dig into the engine conversion STC and see if it mentions an alternator for the install. If that is the case I may be able to just get an alternator STC for the engine and have it covered under the already installed engine conversion STC.
This post was modified 6 months ago by Taylor
Posted : 22/06/2022 1:57 am
I wouldn't put much hope in flashing the field. That usually only needs to be done when you install a new component, so they no left from right. A alternator sounds nice, but it's easy to fix a generator system and it might only cost you $100. With an O-470 it's super easy to " motor the generator" and you can get a new regulator with "good numbers", for under well $100. A new alternator would be nice, but not as nice as many other things + generators work great. Most turbo props and jets use generators.
