Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Need Torgue advice

Need Torgue advice

Need Torgue advice


Have idea to build 4x4 competition off-roader like hydrostatic hybrid.
Engine + hydraulic pump + accumulator + wheel motors.

Question = how much Nm needs 39'' agricultural tire to spin/start spin if it's fully entrenched into heavy wet clay or sand  ?? (or how to calculate, or from where to found some info)

car weigh max 1500 Kg, tires 39'', wheel speed max 400 RPM
opinions at all - may there be a point, or is these just waste of time ??
(meaning - impossible to found parts with parameters I may need)

PS: First post - please don't kill me jet :) - English is not my home language  

RE: Need Torgue advice

I can't answer your question. But the Bohne brothers, Don and Fran, once built an unusual modified pulling tractor in which the jet turbine engine (T-53?) drove a hydraulic pump which powered hydraulic motors at each rear wheel. This was at least twenty years ago and they no longer compete with the tractor. They are in Wellsville, New York- if I locate a phone# I'll post it later. I believe their business is still in operation (high precision machining, specializing in turbine stuff). They are pretty sharp engineers and might have some numbers that would help you. I realize that mud bogging and pulling are quite different, but they also were dealing with tall tires (somewhat more than 39") on unpaved surfaces (usually wet clay).

RE: Need Torgue advice

The name of their business was BOGO Machine, with phone numbers 585-593-2600 and 585-593-3593. A home phone was 585-593-6305, but I don't remember whether it was Don's or Fran's. I haven't called them in years- if you can't reach them, I could try to get up-to-date numbers for you.

RE: Need Torgue advice

Typo in above post: should say BOGE Machine.

RE: Need Torgue advice

Thanks - I try to call

RE: Need Torgue advice

ook - if I try to calculate so

I know 250 Nm engine can do that with 1st gear (around 1/4) + transfer (1/2) + C303 portal axles (around 1/7)

250x4x2x7 = 14000

driveline loss with transfer and portals 50-60% ???

4500 Nm ?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close