Model Boat Mayhem
Mess Deck: General Section => Chit-Chat => Topic started by: Klunk on May 27, 2021, 06:49:23 am
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as stated above. I have come into possession (free ), of a marblehead yacht. Laying in the box underneath was a talisman system drum winch. made by world electronics. I can find no info!!! im after pull weight, time to run 60 degrees and most important max and min voltage
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Unless someone has one with its information, it's down to some empirical testing.
6 volts is generally a good start point unless there is an extra power input for the motor.
Clamp it to a bench, give it a signal from a servo tester, dangle its string over the edge of the bench, apply weight to the dangling end, test.
It is rare for servo/winch makers to give accurate figures for performance - the force figure should involve a weight figure and a distance figure, e.g. 7Kg/cm to give an idea of the radius of the drum to give the force figure.
Speed generally depends on load. While numbers are nice for bragging rights, performance is best described as "Thats REALLY FAST", "Thats quick", "thats OK" or "Is it working?".
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1. Im being lazy
2. I dont want to set the rig up to test
3. I have never heard of this manufacturer
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Yacht folk remember these drum servos.
Adverts in old magazines or a post or email to model yacht forums might be enough to get an answer but a photo or two would help.
It's likely the same voltage the receiver can withstand if it does not have a separate battery lead.
With battery lead, nominally 7.2 or 8.4 battery, with the load that burns drive transistors being more significant.
I think the broken one that I have is from them.
The current rating is a tiny 800mA from bipolar BC338, BC328 transistors compared to the robust 21st century semiconductors in a £4, 6kgcm standard size servo. The drive transistors would burn out where a servo motor would burn out today.
I hesitate to write this as the the supplier is long gone and SLM won't be able to help. They don't keep anything but injection moulded boxes.Before the internet SLM had a stapled paper RC related catalog but concentrate on the boxes to business customers
My servo came as a drum servo mechanism from W.E.SLM, who supplied Fleet Systems metal & injection moulded plastic parts, supplied mechanics to W.E..World and others fitted their servo circuit boards in different connector options.
Facebook (https://www.facebook.com/SLM-Model-Engineers-Ltd-973952662647575/) for SLM
Single contact page for a website (http://slmplastic.co.uk/)