Author: robert@... Time: Thu Aug 30, 2001 11:41 am PDT Link
Jan,
I think your approach is the absolute best to reliably get people in
the air with Subarus. The old saying "stock is rock" couldn't be more
appropriate. Conservative reliability is the mantra in aviation for
very good reason.
One of the main reasons I think your package is the best is that you
don't like to take chances or live on the edge. That adds up to
comfort level. I think this is the most responsible position a vendor
could take.
My bad habit of taking things apart and changing things is solely a
personal problem that I don't encourage others to follow (unless they
have to).
Robert Paisley
--- In RV7and7A@y..., eaainc@a... wrote:
> So from the last few insertions you can all see why I don't get
> involved with changing the engine. It is a 400 HR job and has no
> guarantees :) The supercharger I am installing will not boost the
> engine to any significant degree but is available to compensate for
> the loss of HP with altitude. Airplanes hat can maintain power at
> altitude have great performance gains due to the thin air to fly
> through but with HP to do it:)
>
> Personal experimentation with turbo's is great and is for those
that
> want the ultimate in performance. There is allways a price.
>
> Lets not compare the "auto engine in airplane" with the "race cars
in
> airplane" thing. We all know cars on the street are very reliable
> and we would not stand for them to operate like the aircooled
> alternatives we fly.
>
> Jan Eggenfellner www.subaruaircraft.com
Author: "Rusty Williams" <hecilopter@...> Time: Thu Aug 30, 2001 12:03 pm PDT Link
Jan,
I really like the possibility of using the Subaru engine technology (EFI, computer management, etc.) in an airplane. I would like you to address my only concern, if you could take the time.
I've read that aircraft engines were designed to be air-cooled and to develop 75% power at all times at a relatively low (~2500) rpm. This is as opposed to the Subaru (or any automotive engine for that matter) that was designed to produce much less power on a constant basis. To get the power needed for the airplane, the auto engine must be run at a much higher RPM and then reduced through a gear mechanism to the prop.
Can these auto engines sustain high rpm/high power output on a continuous basis without harm or risk?
If so, I would definitely like to research further into the possibility of using the Subaru (esp. with the supercharger).
Thanks for a reply,
Rusty
----Original Message Follows----
From: eaainc@a...
Reply-To: RV7and7A@yahoogroups.com
To: RV7and7A@yahoogroups.com
Subject: [RV7and7A] Engine mods :)
Date: Thu, 30 Aug 2001 18:07:03 -0000
So from the last few insertions you can all see why I don't get
involved with changing the engine. It is a 400 HR job and has no
guarantees :) The supercharger I am installing will not boost the
engine to any significant degree but is available to compensate for
the loss of HP with altitude. Airplanes hat can maintain power at
altitude have great performance gains due to the thin air to fly
through but with HP to do it:)
Personal experimentation with turbo's is great and is for those that
want the ultimate in performance. There is allways a price.
Lets not compare the "auto engine in airplane" with the "race cars in
airplane" thing. We all know cars on the street are very reliable
and we would not stand for them to operate like the aircooled
alternatives we fly.
Jan Eggenfellner www.subaruaircraft.com
Get your FREE download of MSN Explorer at http://explorer.msn.com
Author: "Whistman, Troy J." <troy.whistman@...> Time: Thu Aug 30, 2001 12:23 pm PDT Link
I, too,would like to know if the Subaru, in Jan's configuration, has been run on a Dyno for an extended stress/torture test (48+ hours non-stop high RPM). If so, I'd like to see the results. Jan?
Troy Whistman
Fort Worth, TX
-----Original Message-----
Can these auto engines sustain high rpm/high power output on a continuous basis without harm or risk?
If so, I would definitely like to research further into the possibility of using the Subaru (esp. with the supercharger).
Thanks for a reply,
Rusty
----Original Message Follows----
From: eaainc@a...
Reply-To: RV7and7A@yahoogroups.com
To: RV7and7A@yahoogroups.com
Subject: [RV7and7A] Engine mods :)
Date: Thu, 30 Aug 2001 18:07:03 -0000
So from the last few insertions you can all see why I don't get
involved with changing the engine. It is a 400 HR job and has no
guarantees :) The supercharger I am installing will not boost the
engine to any significant degree but is available to compensate for
the loss of HP with altitude. Airplanes hat can maintain power at
altitude have great performance gains due to the thin air to fly
through but with HP to do it:)
Personal experimentation with turbo's is great and is for those that
want the ultimate in performance. There is allways a price.
Lets not compare the "auto engine in airplane" with the "race cars in
airplane" thing. We all know cars on the street are very reliable
and we would not stand for them to operate like the aircooled
alternatives we fly.
Jan Eggenfellner www.subaruaircraft.com
Get your FREE download of MSN Explorer at http://explorer.msn.com (http://go.msn.com/bql/hmtag_itl_en.asp)
Van's Air Force - World Wide Wing
www.vansaircraft.net
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