Mud Motor - which drive-line joint ?
Mud Motor - which drive-line joint ?
(OP)
I've got a bit of home-brew project going.
I'd like to put a flexible joint in place to allow the motor to sit level....anyone have a recommendation on what to use ?
I'm thinking of something similar to this.... http://www.backwaterinc.com/swomp-37.html
[img http://www.backwaterinc.com/swomp-37.html]
I'd like to put a flexible joint in place to allow the motor to sit level....anyone have a recommendation on what to use ?
I'm thinking of something similar to this.... http://www.backwaterinc.com/swomp-37.html
[img http://www.backwaterinc.com/swomp-37.html]





RE: Mud Motor - which drive-line joint ?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Mud Motor - which drive-line joint ?
Aidan McAllister
Metallurgical Engineer
RE: Mud Motor - which drive-line joint ?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Mud Motor - which drive-line joint ?
By which I mean, at the moment I suspect the pivot is positioned such that the 'heavy' engine acts as a counter mass to the long light prop & shaft.
If your hinge is now between the engine and the prop shaft you don't get to play that game.
Tungsten hand grip & throttle leaver anyone?
You've also got quite a bit of mass (Inertia) from the motor helping smooth out any tendency for the prop to jump around, I wonder if that'll be more of an issue with a lighter weight rig.
Sorry, off topic to your OP but just potential issues that popped into my head after I looked at your link.
What is Engineering anyway: FAQ1088-1484: In layman terms, what is "engineering"?
RE: Mud Motor - which drive-line joint ?
You do make an excellent point though. Speed is a pretty serious consideration with that solution and needs to be examined with care.
Aidan McAllister
Metallurgical Engineer
RE: Mud Motor - which drive-line joint ?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Mud Motor - which drive-line joint ?
50 mph = 52,800 in/min
30" tire = 94.25" circumference
52800/94.25 ~ 560 RPM at the wheel
Assuming a 3.55:1 differential ratio that gives you ~2000 RPM at the drive shaft.
Aidan McAllister
Metallurgical Engineer
RE: Mud Motor - which drive-line joint ?
Figure WOT in high gear > 100 mph >5000 rpm
- depending on vehicle and gearing, of course.
Jay Maechtlen
http://www.laserpubs.com/techcomm
RE: Mud Motor - which drive-line joint ?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: Mud Motor - which drive-line joint ?
Driveshafts generally seem to use cross-style u-joints, where halfshafts (at least in fwd vehicles) generally use CV/Rzeppa joints.
Interesting that the higher speed application uses a device that induces a torsional vibration on the driveshaft.
Jay Maechtlen
http://www.laserpubs.com/techcomm
RE: Mud Motor - which drive-line joint ?
I'm sure a Rzeppa joint will indue less vibration but at least in my automotive experience, they tend to be weaker. I figure either joint type could work in this application.
Aidan McAllister
Metallurgical Engineer