[SPAM] RE: Unusal Props

[Fletcher, Richard]

Dean, 
 
    It is interesting that no other prop manufacturer has been nearly as
successful at marketing this design as APC has. The have essentially
dominated the glow engine prop market. In the giant scale market this blade
style has not shown nearly as much efficiency. The Fuchs line is semi
scimitar in shape and their props work well but other brands with more
traditional designs work as well, or better. I once owned an APC 22X12 three
piece prop and again it was really not much better then a traditional design
wood prop. I wonder why these props work so well at the smaller sizes?
 
 
 
Rich  

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of Dean Pappas
Sent: Wednesday, November 17, 2004 1:56 PM
To: discussion at nsrca.org
Subject: RE: [SPAM] RE: Unusal Props


That's right, and it was a closely held technology until only a few years
before APCs became available.
 
The benefits of the scimitar shape for delaying compressibility effects at
high prop tip Mach numbers have been known since WW2. As it turns out, Von
proved the value of knowing how to read!
 

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On
Behalf Of DaveL322 at comcast.net
Sent: Wednesday, November 17, 2004 1:44 PM
To: discussion at nsrca.org
Subject: [SPAM] RE: Unusal Props


I believe the CAD/CAM, software, algorithms, etc used to develop the
technology/process for the APC prop line came from "quiet" propellers on
submarines.
 
Regards,
 
Dave Lockhart
DaveL322 at comcast.net <mailto:DaveL322 at comcast.net> 
 

-------------- Original message -------------- 

Dave Von Linsowe was experimenting with semi-scimitar shaped props at that
time, I wonder if APC was influenced by his efforts.
 
 
 
Rich
 

 
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of Rcmaster199 at aol.com
Sent: Wednesday, November 17, 2004 1:32 PM
To: discussion at nsrca.org
Subject: Re: Unusal Props



Yes we do. The semi-scimitar design was a huge departure from the "Normal".
I heard from many "...what an ugly prop.....never will use.... blah, blah,
blah...." among other things. But performance has silenced everyone.
 
Matt
 
 
In a message dated 11/17/2004 1:24:21 PM Eastern Standard Time,
rcaerobob at cox.net writes:


Mostly the Rev Ups were used because they made our motors SING!!!  I mean
FAST...LOUD...but never went anywhere.
    We didn't know better.
 
Then came MK and Asano....
Then this maverick APC thing....Boys, we remember when THOSE first hit the
pits, don't we??????????

Bob Pastorello
NSRCA 199  AMA 46373
rcaerobob at cox.net <mailto:rcaerobob at cox.net> 
www.rcaerobats.net <http://www.rcaerobats.net/> 
 
 

----- Original Message ----- 
From: Eddie Batchelor <mailto:perkinsrx at centurytel.net>  
To: discussion at nsrca.org <mailto:discussion at nsrca.org>  
Sent: Wednesday, November 17, 2004 12:18 PM
Subject: RE: Unusal Props

True  It might be that.
I don't think I've ever seen a prop labeled as to how many blades.
Interesting thought
I like you're "tlarld"

the prop markings are like this
          2
      12  O  5
        REV-UP

with the "O" being the hole in the middle.

It's times like this I wish the "list" could handle pictures. <G>

Eddie

 
 

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