RE: [RCSE] F3B winches??? Appropriate for TD purposes?

[Daryl Perkins]

On the subject of resisting down to F3B strength:

I understand the argument and rationale. But This is a problem. F3B
winches are very well built and designed. They are very efficient. The
motors selected for use are already very close to the resisted number.
We play all kinds of games with drum size to keep the motor/drum
turning. If it weren't for the mono, we'd get virtually no launch at
all. 

The typical club winch with all kinds of slop in the drum, and about 4
miles of braided nylon (creating about a 6 inch drum, and a very short
drum making the line buildup quickly, the line pulling up on the draggy
fan belt style brake, and a retriever dragging the whole thing down...
resisted all the way down to F3B resistance Well...can you say
stalled winch?

Again - I understand the rationale, and it is very logical. But not
practical. I think you'll find that some testing is in order to figure
out what the resistance numbers should be for a typical club winch
configuration. 

I do hope that the SWC guys took this into account. 



Darylperkins.com LLC.
1600 McCulloch Blvd. 5B
Lake Havasu City, AZ 86403

www.darylperkins.com








  Original Message 
 Subject: Re: [RCSE] F3B winches???
 From: Jon Stone [EMAIL PROTECTED]
 Date: Sat, December 22, 2007 8:21 am
 To: [EMAIL PROTECTED]
 Cc: Soaring@airage.com
 This link should be helpful
 http://www.google.com/search?q=f3b+winch
 [EMAIL PROTECTED] wrote:
  During the discussion about limiting winch strength and reducing line 
  breaks there have been several references to F3B winches. 
   
  I am not familiar with F3B flying or the winch specs.  Can someone 
  explain F3B or point me to a site where I can read about it? 
 
  Best Regards,
  Ed Anderson
 
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Re: [RCSE] F3B winches??? Appropriate for TD purposes?

[Jon Stone]

OTOH...

I would say real F3B winches are quite good for TD, especially for 
woody planes, if .. (BIG IF) the pilot does not load up a lot of 
tension on the line.  We've found my F3B winch a perfect for launching 
Oly 2's in my club, as the power is low and the line is stretchy.


Daryl does make an excellent point that a detuned TD winch with a narrow 
spool  braided line, might cause some issues with heavier stronger planes.



Daryl Perkins wrote:

On the subject of resisting down to F3B strength:

  

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Re: [RCSE] F3B winches??? Appropriate for TD purposes?

[Bill's Email]

Daryl does make an excellent point that a detuned TD winch with a narrow 
spool  braided line, might cause some issues with heavier stronger planes.



Isn't that the objective?? Keep lines from breaking and strong planes 
from launching high.


In the end what I know is that no matter what you do to the winches the 
same guys are still going to win. The sad and hurtful truth is that they 
are just better pilots than the rest of us.


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