My plane is a Velocity SE; the smaller.....faster, more nimble Velocity....the "say" it is the "sport" Velocity ;-). Yeah, I have had the luxury or some room under the cowl.
I am using two alternators. One in the stock position, it is the off the shelf, 70 amp Mitsubishi alternator. The new one is a 40 amp made for tractors. I purchased it online and had my local auto electric guy here in Houston disable the internal regulator
for 20 bucks. Both my alternators run through their own B&C external regulators (the really expensive one with overvoltage protection).
I will try to take some photos of the A/C. Yeah, I am aware and concerned about the weight. That being said, this unit fell into my lap, almost literally. When I started my job as a cop several years ago, I met a fellow builder in the city where I work.
He is building an RV-7 with an Eggenfelder Soob in his garage. We have become fast friends. He is an engineer by degree and training. He has goobs of experience in aviation and engineering. Following years in the
auto industry as a mechanic for Audi, while he was in school, and then in auto crash analysis before he started his own company. The company installs A/C in A/C's. He has contracts with several big boys with units in everything
from the factory Velocity turbo model to Mooney's, Cessna, Piper etc. The A/C would only be a vague consideration if not for him and his knowledge, talent and the one hell of a demo deal he gave me on it. (including me doing the fiberglass
work on his cowls...and a bit of legal reviews since I am still a lawyer ;-)).
Chris
From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of David Moyer [davidm@remconinc.com]
Sent: Monday, April 11, 2011 11:17 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: New alternator in new position.
Chris, I still need to make it down to check things out before you get it in the air. Congrats on it running! Glad to hear that it is running and starting well. I say keep it simple for now and get it flying. I know it is tempting to put in the A/C now
as our Texas summer seems to be here early this year. Sure gets hot while on the ground especially when it's 100 degrees outside. Are you planning on just running the 40 amp alt, or running two?
I would be interested in seeing the A/C setup you are looking at as I have been looking at adding one to my cozy. Not sure if the extra weight it worth it though.
David Moyer
On 4/11/2011 12:10 AM, Chris Barber wrote:
Ok. First let's restrict comments on the hinky slotted bracket. It is two brackets bolted together to test it out. Neither was long enough so I need to buy or fabricate one. It is working ok for now.
This is a alt for a Kobuto tractor. It is also shipped on the Eggenfelder soob.
It is 40 amps to work with the stock 70 amp in the stock mount. This is wired with the Aeroelectric Z-14 schematic and is mounted on the stock air pump bracket. The Mistral intake almost interfered but I held my tongue just right along with a small prayer to the builder Gawd, Comonmakeitfit, and I figured it out.
I ran the engine (yeah, my engine is actually running) and the alt was rock solid and the belt was smooth as ice.
I saved about 7 lbs. Before you herald me as a weight saving guru the reason I removed the old full size alternator that was mounted with a bit "off" Pineapple Racing alternator mount (it mounts a second alt where the stock air conditioner compressor goes) is to make room for a Seamech aircraft air conditioner. My friend owns the company and is supervising the A/C install. Now if the engine just stays running as great, with really easy starts, as it has been for the last few weeks.
I am conflicted as to install the a/c now or after 40. Local opinions vary with all shades of gray spoken for ;-)
Also, passed my medical this week and am schedules for unusual attitude flying on Tues and Thursday at Texas Taildraggers. Things may be progressing.
Chris
Houston
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