The message from Chris Street contains these words:
My uncle produced a glider winch from a Jag V12 engine with an automatic gearbox. Apparently a moment's inattention could pull the wings off.
It does, but would be a pain domestically. When a transformer vibrates with 50 Hz, you get an audible 100 Hz - usually. The same thing with 400 Hz would put it at 800 - slap bang in the middle of the most sensitive part of the human hearing curve.
On Robby Coltrane's TV show he found someone in the US with a Chevy V8 connected to an air raid siren. It used full power to drive the thing.
And they worry about loud exhaust pipes...
Would that explain the bloody whine I can always hear in aircraft, normally over the tannoy system?
Pete.
Could be. A tannoy system for speech only or musak wouldn't need to go down as low as 100 Hz. So if they used an amp with poor (or faulty) filtering from the supply it could well be the 800Hz.
The message from "PC Paul" contains these words:
If it was this one -
The message from Pete Smith contains these words:
No, that's the nervous passenger sitting behind you.
Sorry didn't make it clear - it was an official one, just not many left in working order.
The lift could be a Bradbury Four post 'WheelFree' lift.
The car is driven onto the platforms. The lift is then raised. Two beams (on rollers) run the length of the car. These can then be positioned to allow the car to be lifted off its wheels. The beams are then locked at the desired height. The platforms are lowered. The car is up in the air with the wheels hanging free.
The one we had gave us many years of reliable service.
Stop rubbing it in! I don't have a garage to put it in :-(
Pete.
I've got one of these, bought it for £100 eighteen months ago Three phase motor on it as well, but a couple of capacitors and a motor start relay from a scrap motor, and it happily runs on single phase. Do a google search for "3 phase convertors" for details.
Pah. Big cap and a slo-blow fuse it'll be alright....:-)
(for those trying - this is not the best of ideas....)
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