|
Sounds like you are there - look like decision time it
near - like - when to launch?
David, you indicated you could go higher on static if tied
down. What is your max static rpm and manifold pressure. The reason
I asked is when Tracy and I got it sorted out when using the 2.17:1, we could
normally get around 5200 rpm static with a 68x72 prop. Your elevation and
prop certain is a factor.
By the way, I upgraded my Rv-6A brakes and rotors.
My rotor are twice the thickness of the normal Rv-6A rotor - this has eliminated
brake fade, reduce brake pad wear, and has given a solid feel to the brakes -
oh, yes, it stops quicker. I always say its one thing if you can't get
started - its an whole other ball game, if you can't get stopped
{:>)
Any idea when you plan on taking your bird
aloft??
Ed
Sent: Sunday, June 19, 2011 10:52 AM
Subject: [FlyRotary] Re: Blower does work
RV6A,
1140#, 13B, RWS EC2, EM2, -B-drive 2.17 to 1 ? with 20" intake
runners, home made Dynamic Chamber w/curved back, 3" throttle-body
from 2000 Cadillac Deville Northstar 4.6L eng., exhaust aprox. 2"
into 3" X 36" into Hushpower muff., standard Cleveland brakes from
Vans Aircraft, at 4700 rpm & aprox. 26 MAP, I can not hold the
aircraft from moving unless I tie it off to my truck & I can go higher
in power. David R. Cook RV6A Rotary (
transition training nearly complete, I feel ready to go
) ----- Original Message ----- From: "Bill Bradburry"
<bbradburry@bellsouth.net> To: "Rotary motors in aircraft"
<flyrotary@lancaironline.net> Sent: Saturday, June 18, 2011 9:18:32
AM Subject: [FlyRotary] Re: Blower does work
Hmmm! Unless your
blower is a restriction, the MAP will go to ambient pressure (100 Kp?) if you go
to WOT.
If you fix that prop so
that it is moving air, you need to look at some of the pictures of Tracy when he
is running his engine! Even his ears are pinned back! :>)
Think dog hanging our of a car window at 100 MPH. Sorry
Tracy!! :>)
You will need to tie
that laptop down or it will be in the next county!
Bill
B
From: Rotary motors
in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ernest Christley
Sent: Friday, June 17, 2011 11:57
PM
To: Rotary motors in
aircraft
Subject: [FlyRotary]
Re: Blower does work
On 06/17/2011 07:10 PM, Bill Bradburry wrote:
If the prop load was
maxed out, the rpm would not increase, but the MAP could go up. It sounds,
tho, like this might not have been the case since Earnest felt the prop was not
pulling.
Bill
B
First, the prop definitely was not pulling with any
significance. The most it could do was scare my wife, and blow over a fan
that I had sitting on top of a 5-gallon bucket. I'll fix that this
weekend.
Second, if the prop limits rpm, the MAP will not continue to
increase. The blower is tied to the prop with a 3.18 gear ratio.
Since it won't turn any faster, it won't be able to raise the MAP any
further. |