Dave, all well and good, but the average club/pilot doesn't have a wide
drum only a drum that equals the length of the long shaft.
Hell if we use a wide drum there's no need for a long shaft, just build
an F3B winch.
I have used my F3B winch with braided on occasion, it doesn't have the
zip that mono has for sure.
so I think that moving the resistance slightly lower to give ample power
without breaking the line is in order.
I noticed that Daryl posted the same, and I would think that Daryl is
certainly knowledgeable about winches and launching.
I don't believe that the current FAI setup on a Ford with Braided would
be strong enough. I would not want to get out of shape and not have
enough power to pull me back on. This is where a real lack of power is a
problem.
Again I believe that you can lower the resistance on an FLS to get the
power to where it won't break lines, and will make everyone happy (ok
not everyone, that'll never happen).
[EMAIL PROTECTED] wrote:
Jeff, I had a FLS wade built motor powered winch with a wide drum that I used
with mono for F3B and with braided 200 lb test line for TD. this winch had a
1/2 inch dia threaded stainless steel rod as a resistor to make it F3B legal
and it was never disconnected.
1) You can't hurt the S/S rod with the heat generated by the hardest use at a
contest and,
2) you won't hurt the motor, brushes or any other part of the motor with the
S/S rod.
3) You will find that you can launch any of the current breed or future
sailplanes with this package assuming the use of a properly built FLS motor on
braided 200 lb test line.
4) Battery life will depend on the battery capacity you choose. Small chargers
on the winch line and a small generator near by all but eliminates that
question.
Jeff, I have done this and I have built a new winch that will prove again, my
plan to be workable. Bosch motors used in F3B may not provide the same power
that the FLS motor can using braided line due to the larger armature and field
dia's on the FLS motor but here again, the motor of choice in the US is the FLS
so until we get off our cans and start experimenting with the variables what
will get done.
I have started with my testing again, HAVE YOU ? Let us know when you have some
results to report and I will do the same.
Regards, Dave Corven.
-------------- Original message ----------------------
From: Jeff Steifel <[EMAIL PROTECTED]>
Without knowing for sure, I don't think we want the same resistance as
the F3B winches.
The F3B winches use mono so they get power from that, and the FLS draws
way more amperage, so if we resistor down to where the F3B winches are
the resistors will probably get smoked...
I would think we would want a little less resistance to overcome the
lack of mono, and higher draw of the FLS.
One of the Electrical engineers could probably come up with a decent
resistance. I'd expect it to be a small , but as my F3B teacher has
taught me a little change is a lot of power.
[EMAIL PROTECTED] wrote:
Long, but read it anyway.
Tension limiter discussions come and go and even the simplest concepts not
only add a substantial cost to each winch an more potential failure points which
could put a winch in a contest situation down for the day, where a broken line
can usually repaired within a few minutes.
Two things that we can do to stanardise winch power, minimize line breakage
and make winches more user friendly are:
1 ) A simple 1/2 stainless steel threaded rod installed between the FLS and
the power from the solenoid can be adjusted to provide the resistance specs for
F3B winches.
Remember that the resistor rod is threaded so adjustment is simple with a pair
of jam nuts. There are a few checking devises for F3B winch certification that
should be available to proof the setup. AMA has one.
The target setup should be the same as current (pun intended) requirements for
F3B winches for a standard and then any winch could be used for all TD comps,an
F3B comp and possibly to run an F3J comp also. The stainless rod is also
unaffected by the heat generated by contest loads and cannot fail during heavy
use.
Also the cost can't be more than $10 to $12 per winch. That reads CHEAP ! I
have done this mod thee times and and can testify to it's ease of installation
and cost.
2 ) The slightly lower power achieved above, and I mean slightly, allows for
lower lb test line which will cost less and more importantly allow some stretch
at the launch release giving the pilot a better choice on the amount of line
tension preferred, instead of jerking the sailplane out of his hand. Also could
be an easier launch with the more fragile wood constructed sailplanes.
This mod has been done 3 times by yours truly with successful results. I see
where Mr Hands Off Retriever fame, Rick Botha is supplying the SWC comp with a
winch resistor system and that will be the start of something. We have to quit
talking about this and get it done.
I propose that we get the Soaring Nats winches resistorised for this years
Soaring Nats and with lighter line than the 300 lb test line that we have
migrated to this last year.
Regards, Dave Corven.
Also Merry Christmas and a Happy New Year.
-------------- Original message ----------------------
From: Marc Gellart <[EMAIL PROTECTED]>
From what I have seen in this thread, the two real simple, straight forward
suggesions seem to be, lower capacity batteries like used in B, and lighter
line, like 200# (which the Dayton club already uses and it works just fine
for
them except they have a great grass field and and no humps in it).
Personnally I just hate downwind launches (my problem huh?) and tension
limiters
sound worse than retrievers to keep working correctly. I am really
interested
to hear how SWC goes to see how Rick's resistor set up works, that might work
just fine.
I've had my arse chewed on privitaly about somethings here, heh, these are
just
ideas, right? Still wished we all had the B winches though, then there is no
problem.
Marc
Have a great Christmas, and holiday with your families!
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