A "Lockhart Prop" Update...

Wed May 26 18:34:13 AKDT 2004

The Mueller wrap around adds 2", maybe just a little more, to the "straight
line" distance of plug tip to baffle.  So my 19.75 is actually 21.75, which
is too long...to the face of the piston, it's probably 21.00"

Bob Pastorello
rcaerobob at cox.net
www.rcaerobats.net

----- Original Message ----- 
From: "Dean Pappas" <d.pappas at kodeos.com>
To: <discussion at nsrca.org>
Sent: Wednesday, May 26, 2004 11:53 AM
Subject: RE: A "Lockhart Prop" Update...

Hey Bob,
Where are you measuring a 19.75" pipe? to the high point? to the 1st baffle?
TIA
Dean

-----Original Message-----
From: Bob Pastorello [mailto:rcaerobob at cox.net]
Sent: Wednesday, May 26, 2004 6:28 AM
To: discussion at nsrca.org
Subject: Re: A "Lockhart Prop" Update...

Cox has been a wreck.  I just got this rpm message NOW (5:30 am,
Weds)....Dean, Vicente, my OS 1.60 on 15% with the Mac's 1290 at 19.75
turned Lockharts 15.75 x 12 three blade at 8160.  A different flavor of 15%
ran 7920.

Way too much.   I've ordered the 13 pitch and will try it.

Bob Pastorello
rcaerobob at cox.net
www.rcaerobats.net

----- Original Message ----- 
From: <vicenterc at comcast.net>
To: <discussion at nsrca.org>
Cc: "Dean Pappas" <d.pappas at kodeos.com>; <discussion at nsrca.org>
Sent: Tuesday, May 25, 2004 11:11 AM
Subject: RE: A "Lockhart Prop" Update...

> Just for your information.  Both the Mintor 140 and the OS 140 RX are
turning the 15.75x11 at around 7700 and 7600 respectively.  The Mintor is a
little stronger but the difference is not noticeable.  One time an sport
pilot approach me and asked me if my plane was ELECTRIC.
>
> Vicente
>
>
> > Go for it! Please remind me what are the particulars of your setup? i.e.
> > pump,pipe etc.
> > Dean
> >
> > -----Original Message-----
> > From: Bob Pastorello [mailto:emc2300 at yahoo.com]
> > Sent: Tuesday, May 25, 2004 10:50 AM
> > To: discussion at nsrca.org
> > Subject: RE: A "Lockhart Prop" Update...
> >
> >
> > Dean, I have NO doubt it will turn the 13.  My 12 was turning 8160 on
> > 15%, and it wasn't screaming lean.  Pipe was actually long-ish at
> > 19.75.  I plan on doing a 13 just to see....
> >
> > Bob.
> >
> > --- Dean Pappas <d.pappas at kodeos.com> wrote:
> > > Sounds good Bob,
> > > Actually the full 13-inch pitch offered great braking on a 140 RX
> > > with long pipe, but the engine/pipe/and needle all had to be spot-on
> > > to get the desired performance. That's when Dave started de-pitching
> > > the prop. I'm curious as to what RPM your 160 turns the 12" pitch
> > > prop, and as to whether the 160 will turn the stock 13" with
> > > authority. That will be super quiet.
> > > Dean
> > >
> > > -----Original Message-----
> > > From: Bob Pastorello [mailto:emc2300 at yahoo.com]
> > > Sent: Tuesday, May 25, 2004 9:56 AM
> > > To: discussion at nsrca.org
> > > Subject: Re: A "Lockhart Prop" Update...
> > >
> > >
> > > My error, Dave corrected me - it IS a 15.75 x 12.  And turns quite
> > > well
> > > on the 160.  Love it.
> > >
> > > Bob.
> > > --- vicenterc at comcast.net wrote:
> > > > Bob:
> > > >
> > > > I also using the "Lockhart Prop" on my Hydeout with same good
> > > > results.  I started to fly Masters this year and I was looking to
> > > > reduce the down lines the speed of the Hydeout.  I also was looking
> > > > for a hot and humid day and the engine (OS 140 RX) was able turn
> > > the
> > > > prop very well, and I didn't have problems.
> > > >
> > > > I flew my Focus and tried the prop.  I really liked the "constan
> > > > speed" effect on the Focus also.  The one I am using is 15.75x11
> > > > (original 15.75x13).  Probably you have the Mintor 1.7 or OS 160
> > > > since you are using 15.5x12.  It is 15.75 or 15.5?  I think I have
> > > > 15.75.
> > > >
> > > > Vicente Bortone
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > > > ATTACHMENT part 2 message/rfc822
> > > > From:    "Bob Pastorello" <rcaerobob at cox.net>
> > > > To:    "NSRCA" <discussion at nsrca.org>
> > > > Subject:    A "Lockhart Prop" Update...
> > > > Date:    Tue, 25 May 2004 02:10:40 +0000
> > > >
> > > > This past weekend, I enjoyed the challenge (ahem) of attempting to
> > > > fly in the most incredible turbulence, gusts, and changes in
> > > > direction of wind during a pattern contest that I can recall.  The
> > > > first thing I made note of on practice day was that the APC 17 x 12
> > > > Std was WAY too fast on the Arresti (11 lbs), so I had to try the
> > > > Lockhart Twister....bolted on at the motel on Friday night...
> > > >     Saturday - early enough to rudely awaken all the sloths in the
> > > > motor home (Team A/S, you there??), I managed a quick test flight.
> > > I
> > > > was happily surprised to clearly see what I was after.  Good
> > > > acceleration - not nearly as rapid on the bite as a 2 blade Std,
> > > but
> > > > plenty good - and really exceptional braking.  The three blader
> > > just
> > > > offerred this very smooth dynamic brake that really made it easier
> > > to
> > > > manage things.
> > > >     My thanks to Dave Lockhart for doing his re-pitch, and my plea
> > > to
> > > > Fred Burgdorf to make a mold.  The 15.5 x 12 three blade is a
> > > > wonderful setup...mine was turning about 8150 on Magnum 15%,
> > > slightly
> > > > less on two other brands I was able to run side by side.  I was
> > > very
> > > > surprised to actually see 120 rpm difference on a prop of this
> > > load.
> > > >     Anywho - if you guys are looking for a great braking prop that
> > > > still operates in the torque band of our motors - contact Dave
> > > > Lockhart....(Lance - I'm sure he can replace your modified
> > > > prop...<G>)
> > > >
> > > > Bob Pastorello
> > > > rcaerobob at cox.net
> > > > www.rcaerobats.net
> > > >
> > > >
> > >
> > >
> > > =====
> > > Bob Pastorello
> > > rcaerobob at cox.net
> > > emc2300 at yahoo.com
> > >
> > >
> > >
> > >
> > > __________________________________
> > > Do you Yahoo!?
> > > Friends.  Fun.  Try the all-new Yahoo! Messenger.
> > > http://messenger.yahoo.com/
> > > =====================================
> > > # To be removed from this list, go to
> > > http://www.nsrca.org/discussionA.htm
> > > and follow the instructions.
> > >
> > > ====================================# To be removed from this list,
> > > go to http://www.nsrca.org/discussionA.htm
> > > and follow the instructions.
> > >
> >
> >
> > =====
> > Bob Pastorello
> > rcaerobob at cox.net
> > emc2300 at yahoo.com
> >
> >
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Friends.  Fun.  Try the all-new Yahoo! Messenger.
> > http://messenger.yahoo.com/
> > =====================================
> > # To be removed from this list, go to
http://www.nsrca.org/discussionA.htm
> > and follow the instructions.
> >
> > # To be removed from this list, go to
> > http://www.nsrca.org/discussionA.htm
> > and follow the instructions.
> >
> =====================================
> # To be removed from this list, go to http://www.nsrca.org/discussionA.htm
> and follow the instructions.
>

=====================================
# To be removed from this list, go to http://www.nsrca.org/discussionA.htm
and follow the instructions.

============# To be removed from this list, go to
http://www.nsrca.org/discussionA.htm
and follow the instructions.

=====================================
# To be removed from this list, go to http://www.nsrca.org/discussionA.htm
and follow the instructions.