record player speed controler

furnik28 · #1 09-04-2004, 12:44 AM

Im from downunder and ive reading these threads and i was looking at building a car for it but im here and the comp is in the U.S. for the petrol powered cars you should try a speed control design like on the old record players were u have a wheel thats 20mm thats on a splined shaft thats then conected to the throtle linkage. then thats conected to a disc thats 50mm in dia then back to a 20mm wheel then conected to your diff so this idea makes every thing inline . the idea is that when u accelerate on the throtle the 20mm wheel spins the 50mm disc and at the sametime u sliding the 20mm wheel towards the center of the disc and thats giving tou more speed to the diff.

furnik28 · #2 09-04-2004, 06:27 AM

im nealy finished tranie for bench testing

munim · #3 09-04-2004, 10:15 AM

what?

mook · #4 09-05-2004, 03:24 PM

lol

I think he's using a record player as a gearbox and in the second post I think hes saying he has got the the transmission ready for a bench test.

I think

mooik

tec_41 · #5 09-05-2004, 04:46 PM

waa? my head hurts lol. If you could, furnik, please explain smore more!

furnik28 · #6 09-06-2004, 04:07 AM

as mu see i dont use drawings for my work so quickly drew something up.

mook · #7 09-07-2004, 01:17 PM

any pics?

mook

BALISTC · #8 09-09-2004, 08:50 AM

I'll be interested to see this..

BTW what part of Oz are you from??

furnik28 · #9 09-09-2004, 09:39 AM

im from south east of sth australia.

craigb · #10 09-09-2004, 10:06 PM

Wow dude, you just blew my theory of using an 8 track tape player grafted to a blender with this record player differential deal.

So if you get a record player that you can turn up to 78rpm, you can really haul some "A", huh?

In either case, you'll need a new spitzer valve and some 30 weight ball bearings.

furnik28 · #11 09-10-2004, 03:03 AM

If your wandering how im able to build this stuff quikly i have access to a rapid protype machine whitch my uncle designs medical tooling for manafactures and hes made a working resin model that i will copie to aloy later. im having truble geting a camera so ill get them on here soon.

mook · #12 09-10-2004, 12:39 PM

you can get cheap mobile phones with a camera. My 3g phone cost me £29! (new) With that i can make videos take photos listen to mp3's etc

good luck

staniland · #13 09-11-2004, 08:20 PM

munim · #14 09-12-2004, 12:19 AM

If you're doing what I think you're doing, you're doing absolutely nothing. Having a 20 tooth gear running a 50 tooth geat that is running a 20 tooth gear is the exact same thing as running a 20 tooth gear to a 20 tooth gear. Anything in between is cancelled out.

furnik28 · #15 09-12-2004, 06:56 AM

the transmision dose not i mean dose not have a singal gear in the tranie until the diff. im geting realy

with the put downs a couple of members comments about it. by with way the diff has come out of a tamiya tb-10 1:10 gas car

Stalker911 · #16 09-12-2004, 11:47 AM

From what I gather you are talking about having one of the gears slide to increase the gear ratio as the engine accelertes? Am I at all correct on this assupmtion?

mgs9 · #17 09-12-2004, 02:04 PM

OK i still dont know whats going on with your idea, but whats wrong with the traditional 2-3 speed transmissions?

Don't try to reinvent the wheel when its probly not going to be as practical. But hey if you can prove me worng and get this idea of yours to work all the more power to ya.

mook · #18 09-13-2004, 11:16 AM

pics speak a thousand words and all that

Photoguy · #19 09-18-2004, 12:35 AM

Furnik28,
My Snapper riding mower has the transmission you are talking about. A disk is attached to the engine and a rubber rimmed wheel contacts it at a perpendicular angle. Shifting "gears" moves the rimmed wheel to different positions on the disk changing the ratio. Reverse is accomplished when the wheel is moved past center to the opposite side. The wheel is spring loaded. Although it is a friction drive, it has seven positions (notches) in the shifter panel including neutral and reverse and five speeds forward. To change ratios, just move the lever while moving. It's almost like a hyrostatic drive with infinite ratios. The amazing part is that the rubber rimmed wheel doesn't slip at all!

ctwalker · #20 09-18-2004, 10:49 AM

Quote:

Originally Posted by Photoguy

Furnik28,
My Snapper riding mower has the transmission you are talking about. A disk is attached to the engine and a rubber rimmed wheel contacts it at a perpendicular angle. Shifting "gears" moves the rimmed wheel to different positions on the disk changing the ratio. Reverse is accomplished when the wheel is moved past center to the opposite side. The wheel is spring loaded. Although it is a friction drive, it has seven positions (notches) in the shifter panel including neutral and reverse and five speeds forward. To change ratios, just move the lever while moving. It's almost like a hyrostatic drive with infinite ratios. The amazing part is that the rubber rimmed wheel doesn't slip at all!

This could be fun to work with, using a servo to have an adjustable ratio for extreme offroad stuff. It would let you match speed/power to the task at hand. Where you are just looking to go as fast as you can on a level track, I can't see any benefit. Of course I could be wrong....

slickfast · #21 03-24-2005, 06:37 PM

Hey may I just let you guys know that furnik28 is in fact the same person as Kastcreations. He has a history if lying about his cars and equipment, quoting that he launched his car at 85 mph with a big rubber band and was able to bring his car up to "160 mph easy". Please consider the evidence and don't waste your time.
http://forums.radiocontrolzone.com/s...22#post1702322

ducati777 · #22 03-24-2005, 06:49 PM

Kastcreations=banned.

Way to sneak back in man. Despite your usual exagerrations, this is actually a pretty good idea. I didn't understand your drawing, but the explaination about the lawnmower makes perfect sense.

I proposed a variable ratio tranny using cones and belts, and most people agreed that it was a neat idea, but might not be efficient enough. This idea looks pretty good really.

Gotta hand it to you, 90 percent of the time you're full of nonsense, but this is pretty cool.

tadium54 · #23 03-25-2005, 02:48 AM

The grammar leaves much to be desired too. But its an interesting idea

Kucheg · #24 03-25-2005, 08:37 AM

I bet that the losses in power due to friction will be a lot greater than the benefits, plus it would most probably be too temperamental and would break easy due to the high power of the engine.

We used a similar idea on these "mousetrap powered cars" in school, we had a mousetrap with an arm soldered onto the bit that comes down onto the mouse, and we made a tapered spindle on the rear axle. There was a bit of string connected on the end of the arm, and was wrapped around the spindle. I will draw up a diagram when I can be bothered.

It worked well because it was simple... I think my school came in the top 3

*Diagram Coming Soon*

ducati777 · #25 03-25-2005, 11:13 AM

Actually I don't see it being inefficient at all. If the discs were bevelled slightly, it should turn really smoothly. I'd use a disc on each side of the sliding pully to sandwich it in there.

I've always been a fan of variable trannies, and usually they're stupidly complex. This one is straight forward, simple and small enough to fit in a top speed car... Look up the waveform transmission, or the variable rachet tranmission for some crazy variable speed ideas...