| |
| |||||||
 |
| | LinkBack | Thread Tools | Display Modes |
08-02-2007, 01:37 PM
| #21 |
| Newbie Join Date: Dec 2006 Location: Toledo
Posts: 45
| 
Well, I'm going to wait to order the parts until this gets all cleared up. Hopefully some more people will post on this topic and will give good reasonings on this. I will also talk to my uncle (mechanic) and show him my theories and such and see what he says. Well, it's a total of 13 gears, and at $3.69 on Towerhobbies... It's going to be $47.97 With out shipping/tax I may add another 2 gears to connect to the motor(like the green shaft going to the red shaft), or just connect it to the "red shaft"  Last edited by Charger; 08-02-2007 at 01:58 PM. |
|  |
| Sponsored Links | |
| | |
|
08-02-2007, 01:45 PM
| #22 |
| Newbie Join Date: Nov 2006 Location: WestCoast
Posts: 40
|
In a manual tranny the gears are constant mesh. No going into and out of mesh. On the other hand its the drive dogs that connect the shaft to the gear that you hear grinding when you miss your shift. No need for helical cut gears. I think the main benifit of helical cut gears is strength and quietness.
|
|
| |
|
08-02-2007, 01:45 PM
| #23 | |
| Winner of the '07 RCC dumbass award! Join Date: Nov 2006 Location: Up on a Mountain, out in the Woods
Posts: 661
| Quote:
The helectical cut gears in modern trannys DONOT mesh and unmesh. Syncro's keep gears from grinding. Helictical gear are just quieter running and last longer. only difference. The gear surfaces themselves Stay meshed even when the tranny is in neutral. They DONOT move. Its the syncro's that enguage a gear to the shaft. I would like to know how you plan on building this connection between the shaft and gear so that it will lock and unlock. You say you have been reading up on the manual 5 speed. Are your plans to scale down the syncro's, or do you have an alternative method of enguagement? (no syncro's) Direct Gear teeth enguagement will not last long. Good luck with your project! I will try to help anyway I can!  Also, you might get a few Ideas from a dirtbike tranny. Some don't have syncros. Last edited by WheelChair; 08-02-2007 at 01:49 PM. | |
|
| |
|
08-02-2007, 01:51 PM
| #24 | |
| Quarry Creeper Join Date: Jul 2007 Location: Sierra Vista, Arizona
Posts: 271
| Quote:
| |
|
| |
|
08-02-2007, 01:53 PM
| #25 | |
| Winner of the '07 RCC dumbass award! Join Date: Nov 2006 Location: Up on a Mountain, out in the Woods
Posts: 661
| Quote:
It was not a problem for those guys that built the 1/4 scale V8's... | |
|
| |
|
08-02-2007, 02:03 PM
| #26 | |
| Quarry Creeper Join Date: Jul 2007 Location: Sierra Vista, Arizona
Posts: 271
| Quote:
| |
|
| |
|
08-02-2007, 02:06 PM
| #27 |
| Newbie Join Date: Dec 2006 Location: Toledo
Posts: 45
|
Thank you much Wheelchair. I was not sure on how Syncros work... I'm gona go read/look some more and see what I can find. If I can't find a way to make them work, I can use rubber that will engage the gear instead.... in fact that might just work better. Well.. probably not, it might slip too much.
|
|
| |
|
08-02-2007, 02:07 PM
| #28 | |
| Winner of the '07 RCC dumbass award! Join Date: Nov 2006 Location: Up on a Mountain, out in the Woods
Posts: 661
| Quote:
Well I donno I didn't see anything other then a box on the back of the motor but I was talking about the Actual parts for the engine. As in If they can make little valves and oil pumps and bearings for these motors.... A syncro for a small tranny should be no beef...... IF you got the money. | |
|
| |
|
08-02-2007, 02:09 PM
| #29 | |
| Winner of the '07 RCC dumbass award! Join Date: Nov 2006 Location: Up on a Mountain, out in the Woods
Posts: 661
| Quote:
If you make it spring loaded then it should be fine... It would be a good way to add a slipper to the mix! | |
|
| |
|
08-02-2007, 02:11 PM
| #30 | |
| Quarry Creeper Join Date: Jul 2007 Location: Sierra Vista, Arizona
Posts: 271
| Quote:
| |
|
| |
|
08-02-2007, 02:12 PM
| #31 |
| Rock Crawler Join Date: Oct 2006 Location: England, Where the birds fly backwards.
Posts: 626
|
you should make it 1/6 then stick in a 5 speed transmission and a conley engine it would be absolutely excellent and real scale!
|
|
| |
|
08-02-2007, 02:17 PM
| #32 | |
| I wanna be Dave Join Date: May 2006 Location: Arlington, VA
Posts: 3,377
| Quote:
| |
|
| |
|
08-02-2007, 02:17 PM
| #33 |
| I wanna be Dave Join Date: Dec 2005 Location: between heaven and hell.
Posts: 3,367
|
some of these gears might be of help. http://www.servocity.com/html/gears___sprockets.html |
|
| |
|
08-02-2007, 02:20 PM
| #34 | |
| I wanna be Dave Join Date: May 2006 Location: Arlington, VA
Posts: 3,377
| Quote:
| |
|
| |
|
08-02-2007, 02:22 PM
| #35 | |
| Quarry Creeper Join Date: Jul 2007 Location: Sierra Vista, Arizona
Posts: 271
| Quote:
| |
|
| |
|
08-02-2007, 02:24 PM
| #36 |
| I wanna be Dave  Join Date: Mar 2005 Location: Hiding from Goodall
Posts: 2,518
|
If you can get your hands on a Tamiya 3spd transmission (big rig or Hilift). It shifts 3 gears without a synchro by simply jamming a fork into the gear you want, kinda like a stick in a bike wheel. It spins freely until something is jammed into the spokes. Yes it is not made for a rig moving 30 MPH and will "grind" but the one I used in my tow rig shifted very well on the fly once the shifter was adjusted properly The Tamiya transmission is a bulky thing but it could be smaller with some custom parts. |
|
| |
|
08-02-2007, 02:26 PM
| #37 | |
| Newbie Join Date: Dec 2006 Location: Toledo
Posts: 45
| Quote:
| |
|
| |
|
08-02-2007, 02:31 PM
| #38 | |
| Quarry Creeper Join Date: Jul 2007 Location: Sierra Vista, Arizona
Posts: 271
| Quote:
And havent you ever heard of this thing called a joke? Another meaning for it is this thing called sarcasm...  | |
|
| |
|
08-02-2007, 02:38 PM
| #39 | |
| Winner of the '07 RCC dumbass award! Join Date: Nov 2006 Location: Up on a Mountain, out in the Woods
Posts: 661
| Quote:
I don't know what experience you have with things, so I am going to try and explain it all simply. If you were to take apart a TQ3 radio, the third channel switch has a spring and a ball. `This gives the switch positive enguagement to either side. Meaning when the switch is one way, the spring holds it in position. Same thing with the light switch on your wall for the house. There is a rocker, a spring and a ball. I would suggest to go and buy a 110v light switch, and take it apart. It will show you better then I can explain. Basicly it locks into position with spring pressure. Relying on a servo to put enough pressure to hold the gear enguaged is going to: 1.) Eat batteries 2.) Not hold well 3.) Burn up servo's (At Least in a rubber syncro setup) The switch is only an example, sorry, I don't know the term for this action. But it would give you an idea of what I am saying. Last edited by WheelChair; 08-02-2007 at 02:42 PM. | |
|
| |
|
08-02-2007, 02:41 PM
| #40 |
| I wanna be Dave Join Date: May 2006 Location: Arlington, VA
Posts: 3,377
|
So what maybe you ought to look into for shifting, is have it shift like a motorcycle. Or a toggle switch, forward is upshift, backward is downshift/reverse.
|
|
| |
|
| |
Linear Mode
