STI Farm Fox Build Log

[Kitfox Pilot]

Hot dang Harlan!

Farmfox is going from STOL to VTOL! Did you recieve a different engine from Rotax after the case hardness test?

Are you keeping the same propeller setup on it as well?

Cant wait to see this!

Hello Tyler! I wish they would have given me another motor. I have to remove the gear box when they get parts to get a new case. Yes I can use my prop according to the manufacture.

[Kitfox Pilot]

I guess I'm confused, which engine failed the hardness test, the 915?

Rick

Rick the 916-gearbox case failed the hardness test by a couple points. All that means is it has to be replaced when they get parts. It's not a failure problem they say, just something that might develop oil leaks over time. I will have it removed and ship it to them when they get parts.

[bumsteer]

Got it, thanks Harlan.

Rick

[ADK-Flyer]

It won't be long now....

Hey Harlan did you film the engine swap for the Youtube channel? I personally would love to watch it.

[Kitfox Pilot]

Hey Harlan did you film the engine swap for the Youtube channel? I personally would love to watch it.

I did not video like I did the 915 mounting. I didn't figure there would be any interest in seeing it again. I will have a video on it sometime for sure and hopefully some comparisons. They are pretty much the same engine on everything except take off power. continuous power, 5500 rpms, is only 2 hp difference. The extra takeoff is only needed for 2 people in deep soft sand.... ,and for fun!

[jiott]

Hey Harlan, I heard you used a slick method to determine where to cut the hole for the exhaust pipe exit from the lower cowl. Can you tell me where to find it in your build log? I am installing a new exhaust and must cut a new hole in the cowl.

[Kitfox Pilot]

Hey Harlan, I heard you used a slick method to determine where to cut the hole for the exhaust pipe exit from the lower cowl. Can you tell me where to find it in your build log? I am installing a new exhaust and must cut a new hole in the cowl.

I wish that was true Jim. I had a terrible time measuring in space to figure where to cut my hole because the 915 pipe comes out at a 45-degree angle. Somehow it came out correctly, but I doubt I could replicate it. Harlan

[jiott]

OK, thanks Harlan.
I must have been thinking of someone else.
If that someone sees this and can tell me where it is explained, I would be appreciative.

[MikeFairbanks]

I haven't done this yet, and I think I saw it somewhere but don't recall where... with the cowl off and the exhaust installed using 2 pieces of PVC pipe, 1 piece that will slip into the exhaust tail pipe, and another piece that is a slip fit with the first... slip the the 2 pieces together, and into the tail pipe. Then let the lower piece slide down to the ground and secure. This could be screwed or glued to a piece of plywood or something. Once the lower section is secured, the upper section should be able to slide up and down the lower pipe and into the tail pipe. Slide the upper piece down onto the lower section and out of the way of the cowl. Now remove the tail pipe and mount the cowl, slide the upper section of pipe up... where it hits the cowl is where the tail pipe was and the opening needs to be.

I hope that makes sense.

[jiott]

Yes, that is what I was looking for.
Thanks