Thanks Geek, it helps to keep me building when it helps others. There are days I say what have I got into!
Thanks Geek, it helps to keep me building when it helps others. There are days I say what have I got into!
Harlan and Susan Payne
Flying FarmFox STI Kitfox N61HP
Rotax 915is, Airmaster prop.
https://www.youtube.com/@KitfoxPilot/videos
Harlan and Susan Payne
Flying FarmFox STI Kitfox N61HP
Rotax 915is, Airmaster prop.
https://www.youtube.com/@KitfoxPilot/videos
I making my can bus wire now and my question is does it matter what order nodes/LRUs are connected on the line at or can I just hook them up in the shortest order as I come to them?
I can't seem to find this answer online.
Thanks for any info.
Harlan and Susan Payne
Flying FarmFox STI Kitfox N61HP
Rotax 915is, Airmaster prop.
https://www.youtube.com/@KitfoxPilot/videos
The order doesn't matter. Just pick the shortest run and make sure the ends are properly wired or have the termination connector.
Phil Nelson
A&P-IA, Maintenance Instructor
KF 5 Outback, Cont. IO-240
Flying since 2016
Thanks Phil, I didn't think it did but this is all new to me.
Harlan and Susan Payne
Flying FarmFox STI Kitfox N61HP
Rotax 915is, Airmaster prop.
https://www.youtube.com/@KitfoxPilot/videos
Still trying to learn everything before I do it on this wiring. Does this diagram mean the 28 servos and the 507 share the same power wire and 5 amp service?
Harlan and Susan Payne
Flying FarmFox STI Kitfox N61HP
Rotax 915is, Airmaster prop.
https://www.youtube.com/@KitfoxPilot/videos
Yes it does.
John Brannen
Morris, IL
Sonerai IIL (Single Seat)
Kitfox 3/4 1050 - Rotax 582 (Back Flying and sold)
Kitfox IV 1050 - Rotax 582 (sold)
Kitfox IV 1200 Speedster - Rotax 912 UL (rebuilt and now flying)
Piper Twin Comanche (Sold)
Glasair 1 FT (Waiting to start)
My drawing showed a 5amp breaker also but talking with the folks at Stein Air they recommend if all three are sharing a breaker to use a 7.5
That's interesting, I can see why if you use all the trim options your getting close to that 5 amp load.
Harlan and Susan Payne
Flying FarmFox STI Kitfox N61HP
Rotax 915is, Airmaster prop.
https://www.youtube.com/@KitfoxPilot/videos
Note too that the Garmin drawing shows 22 gauge wire. Going to a 7.5A breaker exceeds the 5A spec for 22 gauge wire so if you went the 7.5A route, you need to bump the wire up to 20 gauge. BUT.....
Looking at the loads page of the Garmin manual (page 2-16), the servos are max rated at 1.8A and the 507 is a rip roaring 0.2A so the max pull is 3.8A. Yeah I see the other number of 2.8A per servo but that spec is used when using auto trim and driving the trim motor directly through the servo. You can't do that with the Kitfox trim motor cause it pulls more amps than the servo can supply. You can look at page 27-10 and see the hook up for trim motors that pull more than 1A.
I understand why Stein would be overly cautious about the breaker (I am actually using Stein for my system and they have been nothing but really great). If someone tried to hook up a high current trim motor and operate it through the servos, then the total current pull to the breaker would be 4.8A (2.8A pitch trim + 1.8A roll (no trim) + 0.2A) and that's too close to the breaker level and the max current rating of the wire. They will error to the side of caution. But in this case I think you are OK with your 5A breaker and 22 gauge wire as long as you don't try to operate the trim motor directly.
Geek