Tom Wilson Posted July 20, 2008 Share Posted July 20, 2008 Does anyone have manufacturing drawings for an electric winch. My previous winch is from the 80s and with much heavier line being used nowadays the drum is a bit on the small side so I need to build a new one. I'm not worried about the chassis or wheels, just the drum and motor drive section. Some sizes would be useful. I did photgraph a number at a recent SAA/ Barcs event but drawings would be helpful Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 22, 2008 Share Posted July 22, 2008 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Tom Wilson Posted July 22, 2008 Author Share Posted July 22, 2008 Thanks Eric, I already have all that on my existing winch, but apparently nobody uses a constant tension device nowadays as with modern technology and all the carbon fibre spars and glass wings they use 200lb breaking strain lines. My problem here is that instead of 0.85 diameter nylon line from the 80s, 200lb line or heavier can be 1.35 mm dia. This requires a bigger drum, particularly in length so as not to build up the diameter as the line is wound onto the drum.This requires a different design as with a short drum you can get away with mounting the drum directly onto the starter motor, but with a long drum you need bearings at the othewr end to support the drum and this also requires a different method of locking the drum so that the line doesn't pull back out under load. Quote Link to comment Share on other sites More sharing options...
Former Member Posted July 22, 2008 Share Posted July 22, 2008 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
Ken Latam Posted July 23, 2008 Share Posted July 23, 2008 Boy am I behind the time's!! 1.35mm diam line? thats huge, you may need to look into the petrol powered one's. Far easyer to regulate the speed than the old 12v one's.Ken Quote Link to comment Share on other sites More sharing options...
Andy Burgoyne Posted July 23, 2008 Share Posted July 23, 2008 Why would you want to use a smelly noisey combustable power delivery system when electric winches are so good . A modern F3B winch has to been seen to be beleived in action . Quote Link to comment Share on other sites More sharing options...
Tom Wilson Posted July 23, 2008 Author Share Posted July 23, 2008 This is what people are using nowadays. Usually 1.05, 1.15, 1.25, & 1.35. the heavier line is used for sport flying due to it's abrasion resistance and a slightly lighter line for competition work to get a higher launch. These glider are virtually fired into the air now, reaching speeds of 70-80mph +on launch. I saw a glass wing model literally explode last week just after it came off the line as it was going so fast. As the model was diving off the line at such high speed the lift on the wing just sucked it apart with a loud bang. There is no problem with the 12v power. Quote Link to comment Share on other sites More sharing options...
Tom Wilson Posted July 23, 2008 Author Share Posted July 23, 2008 I have just accidentally disabled the replies to this topic. How do I un - disable it, ie make it active again? Quote Link to comment Share on other sites More sharing options...
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