×
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

Tilt rotor dynamics

Tilt rotor dynamics

Tilt rotor dynamics

(OP)
Other than the way the V-22 does it using a screw/ball jack (hydraulically controlled) does anybody know of a different way to tilt the nacelles of a tiltrotor a/c????

Also: Anyone up on drive shafts? I need to design a way of driving the tiltrotors proprotors on one engine? Is axis gearboxes and interconnect shafting the only way???

Any help you can give me would be gratefully received - Am getting frustrated at the lack of information out there!

Thanks again

Samantha x

RE: Tilt rotor dynamics

Regarding driveshafts, this may help:

http://www.eng-tips.com/viewthread.cfm?qid=99412

You could talk to GKN Spicer, or Dana (suppliers to auto industry) for existing products.

Regarding nacelles, not sure. I quite like the idea of using either cyclic pitch or a trimmed stator/wing, so that the airflow itself controls the nacelle angle. Would need some work on dynamics.

Mart

RE: Tilt rotor dynamics

The Nord 500 used that method with twin ducted fans. Using aerodynamic control of the nacells seemed to be to slow to be effective, however this could have been more to do with the ducts than the control mechanism.
Im fairly sure that the V22 uses a hydraulic cross drive, and not a direct shaft. Off memory its pressurised to about 5000psi. One of the concerns of V22 critics is that to save weight, the hyd lines are very thin walled titanium, and at the pressures being run, one shot could bring down the aircraft.
What dont you like about the srew jack system? seems to work OK. I think it can rotate upto around 5deg/sec.
What size aircraft are you working on?

How are you Mart?

RE: Tilt rotor dynamics

"How are you Mart?"

I'm now an expert in fluid dynamics and the Navier-Stokes equation (apparently) . Exam was hard timewise, but I'm now enjoying reading up on high speed aero and gas turbine notes. Funny how all this stuff makes more sense second time round.

How's your project? Sorry I went offline a while, just never got around to reconnecting. In the end, I decided that I would be too distracted from revision - believe me there was enough of that! I'm fully broadband compliant now, and ready for non-commerce

Mart

RE: Tilt rotor dynamics

Got about 20 irons in the fire at the moment. :)
When you get a chance drop me your new email to my adress. Your not allowed to post email adresses on the forum, got a kick from the mod for that.
Drop me a line, so we dont send this to far OT.
Christian

RE: Tilt rotor dynamics

Same as before. It's the same account, but all the old emails are still on the old computer disk. Since I haven't checked whether this as affected by the lightning strike, I actually can't get to your old emails!

Mart

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