×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

static thrust of tail rotor in pounds????

static thrust of tail rotor in pounds????

static thrust of tail rotor in pounds????

(OP)
This is a very general question intended to gain a perspective. I am thinking of making a variable pitch prop. with blades tilting on spherical bearings to change pitch  . The tail rotos I have looked at have no helical twist which makes me wonder about their thrust output . If a rotor is about 6 feet in diameter turning approx. 2500 rpm what would be the thrust output at a given pitch angle . Thanks ED

RE: static thrust of tail rotor in pounds????

The static thrust of the tail rotor, of a helicopter hovering, for example, is equal to the torque applied to the main rotor divided by the distance between their respective axes.  Once the pilot pushes a pedal, the balance is disrupted, and the heli turns.

Steven Fahey, CET
"Simplicate, and add more lightness" - Bill Stout

RE: static thrust of tail rotor in pounds????

(OP)
Thanks Steven for the answer.  The torque value for the main rotor I'm out to lunch on .  What would be a rough estimate of static thrust for a 6 foot diameter tail rotor say for a 4 person copter???  400lbs ??? 800 lbs??? I just figured the answer would be a common knowledge thing for people into helicopter flight.Maybe I'm out to lunch on that too.
Thankyou ED

RE: static thrust of tail rotor in pounds????

There are a lot of variables to consider if one is to just calculate the required rotor torque.  Any guess without a lot more info would be, as you say, "out to lunch".

BTW, torque is measured in ft·lbs.

Steven Fahey, CET
"Simplicate, and add more lightness" - Bill Stout

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


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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