REFLECTOR: N4PE "The Ape" First Start
Douglas Holub
doug.holub at comcast.net
Mon Feb 27 08:23:15 CST 2006
Congratulations Brian!
----- Original Message -----
From: "Brian Michalk" <michalk at awpi.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Sunday, February 26, 2006 11:23 PM
Subject: REFLECTOR: N4PE "The Ape" First Start
> Ten years ago, on Valentines day our kit arrived. Today we had the first
> engine start.
>
> I can now say I'm the proud owner of a running Franklin/IVO combination.
> I've got two electronic fuel injection systems, electronic ignition, and a
> magneto. It's turbocharged with intercoolers. I fabricated the stainless
> steel intake and exhaust manifold from scratch since there were no other
> working examples to copy. I worked out the math on the injectors, turbo,
> fuel pumps, and all of the components that are simply not available in a
> package. I had a lot of concerns over whether it would work or not. I
> watched other people's failures and tried not to make the same mistakes.
>
> I am very pleased that the large turbo breathes quite well with the open
> waste gate. In fine pitch, I am able to make 2250 RPM. Deeter's Franklin
> will do 2400RPM static. The MAP at 2250 was 28PSI. I calculated I would
> lose a little less than 1PSI across the intercoolers, and didn't know what
> the drop would be for the turbo.
>
> The engine starts like a dream on the Autronic electronic engine
> management system. I did have some problems though. I completely messed
> up the magneto wiring. I have no idea how I did it, but once we got that
> problem sorted out, the engine ran like a top. I am leaking oil out the
> turbo, and need to look at the scavenge pump. I might have it hooked up
> backwards. During the high power runs we needed to tweak the mixture
> because it was originally too lean for the stock setting. The power
> control is a single knob affair. The Autronic calculates all of the
> mixtures for operation.
>
> I installed a Linksys router in the airplane that has been hacked to run
> Linux. We logged the engine data to a laptop via the wireless connection.
> For the first flight we intend to get telemetry via 802.11, and maybe even
> put a webcam on board.
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