Note:  “space drives” refers to transmissions including gears or rollers, bearings, lubricants, seals, etc. used on spacecraft or planetary exploration vehicles.
 

Name / Job function Address Phone / Email

____________________________________________________________ ____________________________________________________________ ____________________________________________________________

Area(s) of concern	Manned spacecraft	____________	Unmanned spacecraft	____________
	Planetary vehicles	____________	Other	____________

Please rate technology needs on a 0-4 scale.  (Rate only those in your area of expertise.)
                            0=no need,  1=minor,  2=average,  3=major,  4=critical
I.   General Drive Characteristics
                                                                                        Rating of Needs

	Manned	Unmanned	Planetary	Other
1.)  High power capacity	________	________	________	________
2.)  Design guidelines	________	________	________	________
3.)  Fail safe/redundant design	________	________	________	________
4.)  Overload capacity	________	________	________	________
5.)  Mechanical efficiency	________	________	________	________
6.)  Wear	________	________	________	________
7.)  Long-life solid lubricants	________	________	________	________
8.)  Replenishing solid lubricants	________	________	________	________
9.)  Developing liquid/grease lube systems	________	________	________	________
10.) Liquid / grease lubricants	________	________	________	________
11.) Lubricant outgassing	________	________	________	________
12.) Robustness to (hot or cold) temperatures	________	________	________	________
13.) Robustness to thermal cycling	________	________	________	________
14.) Robustness to chemical degradation	________	________	________	________
15.) Tolerance to dust/wear particles	________	________	________	________
16.) Sealing out dust/contaminants	________	________	________	________
17.) Sealing in lubricants	________	________	________	________
18.) Tolerance to radiation	________	________	________	________
19.) Lightweight designs for short life mission	________	________	________	________
20.) Other(s)	________	________	________	________

Comments:
 
 
 
 
 
 
 
 
 

                            0=no need,  1=minor,  2=average,  3=major,  4=critical
II.   What are technology needs for various size / power levels and rotation speeds?

	Manned	Unmanned	Planetary	Other
1.)  Micro/nano machines	________	________	________	________
2.)  Small robot machines (Pathfinder)	________	________	________	________
3.)  Medium size rovers (Apollo Moon rover)	________	________	________	________
4.)  Large rovers ("Winnebago")	________	________	________	________
5.)  High-power machines (mining equip.)	________	________	________	________
6.)  Very slow/intermittent speed (stiction)	________	________	________	________
7.)  Slow speed (10-200 rpm)	________	________	________	________
8.)  Medium speed (200-2,000 rpm)	________	________	________	________
9.)  High speed (> 2,000 rpm)	________	________	________	________

Comments:
 
 

                              0=no need,  1=minor,  2=average,  3=major,  4=critical
III.   Where are there needs for development of drive concepts?

	Manned	Unmanned	Planetary	Other
1.)  Conventional single/compound gear meshes	________	________	________	________
2.)  Epicyclic (planetary) systems	________	________	________	________
3.)  Worm/wheel drives	________	________	________	________
4.)  Traction drives	________	________	________	________
5.)  Harmonic drives	________	________	________	________
6.)  Non-conventional	________	________	________	________
7.)  Other	________	________	________	________

Comments:
 
 
 
 

IV.  What technology problems do you anticipate for future space drives?
 
 
 
 
 

V.  Are you interested in collaboration with Glenn Research Center in a space drive systems technology development program?

Y / N

 

Please return survey to fred.Oswald@grc.nasa.gov, fax to 216 433-3954 or mail to
Mechanical Components Br.  MS 23-3, NASA Glenn Research Center, Cleve, OH 44135

rev 15 Nov 00