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Hi group! Finally got moved and they installed my internet today so now I can keep up with this forum. It's to hard on my little Iphone. I still think the only choices we have is the Ballistic air boat drive, (and one other company) and if Tracy would consult, I would build my own which would solve the 6 inch offset with the Ballistic drive. All we need is a drawing or instructions and sign a release and have at it. As I have stated before, I would feel a lot more confident building my own with the talent and resources I am around now than buying something from a start up company with no hours of testing. OK, thats my two cents for tonight. Any ideas from anyone will be appreciated as we need to resolve this problem. thanks ~~~tg~~~
From: Charlie England <flyrotary@lancaironline.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tuesday, July 28, 2015 3:42 PM
Subject: [FlyRotary] Re: Alternative redrives
I might be mistaken, but I think that
the Ross was also missing the input shaft thrust bearing
(overloads the E-shaft thrust bearing).
On 7/28/2015 11:22 AM, Ed Anderson wrote:
Hi Bill,
I flew around 200 hrs with the Ross Drive before finding
that the sun gear was galling. Apparently marginal
lubrication in some of the Ross units was a problem.
By that time, Tracy had his Re-drive on the market, so
rather than mess with the Ross (still have it), I purchased
one of Tracy’s and never had a problem. Well, one – I had
the entire aluminum area nickel plated for corriosion and
appearance. They erroneously coated the inside of tunnel
for the shaft area of the nose part reducing the area for
oil flow. Went out one morning and noticed that it was hard
to pull through, I tried to start the engine and it rotated
a few degrees and just stopped. Fortunately, I desisted at
that point and stopped. Got out and found the prop frozen.
Took it off and shipped to Tracy, he milled a few 1/10000
off the inside of the shaft tunnel and I now have around 400
hours on it. Love it!
Ed
Sent: Tuesday, July 28, 2015 11:56 AM
Subject: [FlyRotary] Re: Alternative
redrives
I stand corrected.
This drive would only have a couple of teeth in
contact at any one time. How many are in contact
with the RD1-C?
What was the
problem with the Ross if you know?
Bill
From: Rotary
motors in aircraft
[mailto:flyrotary@lancaironline.net]
Sent:
Tuesday, July 28, 2015 10:37 AM
To:
Rotary motors in
aircraft
Subject:
[FlyRotary] Re: Alternative redrives
No,
Tracy
started off with a
Ross Drive
…
Jeff
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From:
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Subject:
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RE: [FlyRotary] Re:
Alternative redrives
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Date:
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Tue, 28 Jul 2015
10:22:59 -0500
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To:
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Jeff,
If I am not mistaken,
Tracy
started off using a Marcotte drive on his
RV-4. That drive I think is what inspired
him to develop his own drive. It would take
a pretty bad experience to inspire me to
that extent! :>)
Bill
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From: Jeff Whaley
Sent:
Tuesday, July 28, 2015 10:17 AM
To:
'Mark Steitle'
Subject:
RE: [FlyRotary] Re: Alternative redrives
I see the
aircraft was equipped with an Aluminum Propellor –
which may have lead to the prop shaft fracturing?
I can’t vouch
for the “
Marcotte Drive ”
but Ross Parnham (referenced on this list for P51
style radiator install) uses the
Marcotte Drive
on his Subaru-powered RV6, mated to a composite
prop. The website shows a picture of re-drive and
bell housing mated to a 13B … http://glasairproject.com/Marcotte/index.html
Jeff
Search YouTube
under "LS1 Glasair 111 at
Paducah ,
Ky " for a
video of this a/c idling. You can hear him saying
the PSRU builder is "belly up".
Sent from my iPad
That was during the
Canard Fly-in at Rough River 2011
Sent: Monday, July
27, 2015 2:02 PM
Subject: [FlyRotary]
Re: Alternative redrives
That looks a
lot like the gearbox that failed,
killing the pilot when the engine
disengaged from the prop and he
dead-sticked it into a hotel
building. It was about a week after
the alternative engine fly-in at Ed's
place in
Paduka ,
KY.
As I recall, it was a Glasair III with
a turbo-charged LS1. I have video of
a ground run around here somewhere.
Real sad story. Can anyone confirm
whether or not it was the same make
psru? I never read the final accident
report.
I went
back to the exhibit
buildings, and took some
photos of the psru’s
offered by www.autopsrus.com .
I will forward these
later today as every
thing gets transferred .
They are spur gear
drive, have there own
oil supply and pump, use
pressure fed roller
bearings, will provide
oil for a constant speed
prop, and are available
in many reduction
ratios. They make a unit
that can be straight
through, suitable for
the 13-B, the casing is
CNC machined. They use a
flywheel for the torque
damping, and it has a
centrifugal clutch that
disengages the prop
below ~900 engine rpm,
so when starting there
is no prop load. Will
likely be heavier than
Tracy ’s
I have to
reduce the size of the
pictures before I can
send them.
Sent: Sunday,
July 26, 2015 1:59
PM
Subject:
[FlyRotary] Re:
Anyone or everyone
in
Oshkosh ?
That is very
interesting!
Could one be
built
specifically
for my
combination of
a high HP 20
B? I would
have more
peace of mind
knowing how it
was put
together by me
along with
your knowledge
and
experience.
The thought of
someone just
starting out
making them
does not sit
well with me
as they are an
unknown.
Let me know
what you think
and I will be
in touch.
The
design is
royalty free.
Anyone who
wants to build
it is more
than
welcome. I
can help with
info if you
need it.
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