Hub Bars and Starter Motors

[Tim]

The Torque transmitted is obviously nowhere that suggested otherwise we would shear off the 1/4" bolts every time. There must be a flaw in the thinking somewhere - its just a matter of finding it.Peter Barsden has a soft start system on his Gyro that uses a square wave system to supply a continuous alternating 12V to 0 supply. As you slowly turn the knob up the ratio of of the 12V wave becomes longer until at full power you are running on a constant 12V. The spikes can be eliminated by a suitable surpressor. Just simply reducing the voltage can damage the wiring on some motors because the motor tries to run higher amperage to compensate. There are many much more knowledgeable on this subject that me. Hopefully someone will pipe up.Tim McClure

[asra]

Doc said,"Paul, John Hunt may be the fellow I communicated with about an electronic soft start a couple of years ago. He didn't reply when I asked him a couple of awkward questions, in particular "what steps have been taken to damp any back EMF spikes?".Yes John, that is the guy. I would not expect him to reply to a question from you, or anyone else regarding the secrets of his commercial product!!!!!!!![]I might investigate further, with the status of the US$.I am trying to solve any problems for Firebird with either Oz or NZ technology, but if it is not availible I may have to source further Internationally.[]Aussie Paul.[]www.firebirdgyros.com

[asra]

For those interesredWhen i was playing with electric prerotators i tryed to make a soft start simply by using two batterys .as well as your regular battery you have a small 6 volt motorcycle battery which engages first with a doble pole relay and when things are moving just flick a switch.charge the 6 v battery with a voltage converter.worked well but my mechanical cone set up is lighter and just as efficient.cheersE=MC2

[asra]

mark, did the 6 volt pull the solenoid in?Also I would be interested in your mechanical cone set up. Ta.Aussie Paul. []www.firebirdgyros.com

[asra]

Paul it will engage most small solenoids...just sounds like a flat batteryImage Insert: 73.21

[asra]

Albert, Yours sounds like an interesting experiment, but as light weight and simplicity are desirable your move to a cone type mechanical one is probably a good idea. I gather you can clutch it in to get a nice soft start, like RAF and Wunderlich. The French also seem to be fond of friction drive mechanical drives. Perhaps we have something to learn from them.Paul, I was very disappointed with the lack of response from John Hunt, anybody, particularly in the US who won't answer basic questions about an obvious potential pitfall of their product should be treated with caution. I would have thought being able to extol the virtues of their product would have been seen as an opportunity rather than a threat. Perhaps he only wants to market to the ignorant?Tim, this is not so much a case of thinking, but measuring

[NiqueNaque]

Originally posted by John Thanks for the diagram Nick, I don't know how to do that.Unfortunately you've drawn a first order lever, it's actually a second order, so Archimedes would have marked you down too![:0]. You all know about Archimedes? He's the bloke who said "Give me a place to stand on, and I will move the world". He was into levers and things. Originally posted by JohnYes, but didn't he also run down the streets screaming "ureaka", ah, starkers, buck naked...One thing to consider, John, is the friction between the teeter block and the hub bar caused by the bolts being torqued up onto the hub bar and teeter block. Not too dissimilar to a bolted friction connection in the structural sense. This would absorb a bit of the shock and lessen the blow on the bolts.Maybe the Larcom bars were a tad loose with a bend closer to the teeter that most other bars... examine if this is an issue.Cheers,Nick.Cheers,Nick.

[asra]

Thanks Mark.Aussie Paul. []www.firebirdgyros.com

[asra]

[asra]

Mark, was the starter you used with the 6 volt battery a geared starter or a dirct one[?]Aussie Paul.[]www.firebirdgyros.com

[asra]

Doc, I meant to say earlier in the thread, "thanks for going to the trouble of conducting some sort of testing on this subject."Any component or operation that has the potential to break our life support system, ie. from the tip of the rotor blades to the hand grip on the joystick, needs to be constantly monitored, and we should always be trying to improve the situation.[^]Thanks.Aussie Paul.[]www.firebirdgyros.com

[asra]

What does our ASRA Operations Manager get up to while he is at 'work'? Was he the pilot or the intruder??!! Sorry, Allan, couldn't help myself. Wasn't Archimedes mentioned back a couple of posts? Check out the link below. http://msnbc.msn.com/id/6407177/?GT1=5809 And then read the direct quote from our Operations Manager below!"Thanks MATE, There is absolutely no truth in the rumour that he was calling my name as he climbed into the wheelwell."Llewella

[asra]

hey Paul whats happening? Why are you being nice to John? You getting short of friends or something,or maybe you heard someone is after you and you think a doctor as a friend may be handy!!!!!!

[NiqueNaque]

Gee,And I thought I could be an ar**hole, you beat me marty! Congratulations.Nick.

[asra]

martythanks for sharing that with us. you do have a miserable existance don't you? reading your stuff, i feel pity for you and hope you soon seek some professionl advice, as your outlook is very unhealthy.is your personal health and mental well being suffering as a result of your negative attitude?now go and get some professional help, as you need it.Dave( the septic, thanks Nick i like the sound of it)