A "Lockhart Prop" Update...

[Dean Pappas]

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


	
		
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