REFLECTOR: Update on my Subaru installation

[Alex Balic]

That was the main reason why I was going to go to the non- aqueous coolant-
low vapor pressure- I am not that concerned about it getting thick on the
ground that much as needing to run a high pressure cap all of the time.- If
I start to loose coolant past the cap, I will take a look at that.

 

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From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Laurence Coen
Sent: Saturday, March 28, 2009 1:37 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Update on my Subaru installation

 

Alex,

 

At 10,000 feet you lose about 5 psi of atmosphere making your 14 psi cap a 9
psi cap absolute pressure.

 

Larry Coen

N136LC

 

From: Alex <mailto:velocity_pilot at verizon.net>  Balic 

Sent: Friday, March 27, 2009 9:42 PM

To: 'Velocity <mailto:reflector at tvbf.org>  Aircraft Owners and Builders
list' 

Subject: Re: REFLECTOR: Update on my Subaru installation

 

Hi Chuck-

Thanks for the kind words- I have spoken to the Swings about their
experience with the Subaru- they were using the stock ECU which is not
suitable for aircraft use in my opinion- Tracy Crooks equipment is purpose
built, simple and does a great job.  I have an oil cooler on the Tranny- it
is mounted down stream of the Engine oil cooler, although I might swap
positions if I find that the engine cooler is just cooking the tranny
cooler-  see video-just figured that it was more important to have cool
engine oil than PSRU oil- I have a temp sensor on the PSRU to keep an eye on
things though. I have heard that the Mazda engines are notoriously difficult
to keep cool on the ground, and their high RPM make life difficult on the
gear box too. Right now I am using water/glycol but might go with the
non-aqueous coolants that some folks are running to avoid pressure problems
in the system- I do have a 14 psi cap on there and a pressure sensor for the
coolant system so I can keep an eye on things.  Will be doing a lot of
extended high power ground testing before any flying is considered for sure.

I have a few things to get done before I get flying- namely get my home
brewed retract panel working, get my 2 battery/2 alternator electrical
system connected up just right, and buy a flight prop- so probably will not
be getting airborne until at least the end of the summer (with the recession
and all) 

 

Alex

 

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From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Chuck
Sent: Friday, March 27, 2009 3:22 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Update on my Subaru installation

 

I went with the almost Subaru 6, but Dwayne told me a few stories about
their exciting experiences when it went into "limp home mode". Sounds like
you've got it handled with Tracy's system. I had a turbo-Mazda rotary 20B (3
rotor) which was a problem due to excessive heat and gearbox reliability. I
ended up with more radiators for both the engine and gearbox. You might want
to have an oil temp gauge on the outlet of the gearbox to make sure it stays
under 220F. I hope you don't get engine overtemp problems on the first
flight like I did, but be ready to get back on the ground if you do. Al
Gietzen (Mazda 20B) is the expert on oil/water cooling for non-AC engines if
you need a resource. 

 

Looks like a beautiful installation and we'll be watching for you to take
that first flight. Good luck.

 

Chuck H

 

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From: velocity_pilot at verizon.net
To: reflector at awpi.com
Date: Thu, 19 Mar 2009 10:44:28 -0500
Subject: REFLECTOR: Update on my Subaru installation

Well, after a lot of additional work- and parts fabrication,  I replaced my
previous engine control unit (supplied by our friends at Crossflow) with an
excellent ECU from Tracy Crook / Real World Solutions- I can recommend him
highly- he was always available to help and re-program the unit to make it
work perfectly- I have a new video up:
http://www.youtube.com/watch?v=gW1YtHq9ZtY - I still need to do the fine
tuning programming, but should be taxi testing in a month if I can get out
to the hanger more that a couple of hours a week.... now just need to save
up for that Vesta prop I have been eyeing..

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