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Post by racket on Oct 18, 2016 15:51:28 GMT -5
Nice engine :-)
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Post by racket on Oct 18, 2016 17:55:07 GMT -5
Lotsa guys have wanted to do that , but with the advent of small economical drones the need for jetpacks is reducing to more of a hobby/entertainment sorta thing .
The current very expensive jetpacks using big RC jet engines can't get decent fuel burn rates due to the use of a "high speed" fluid for lift in a slow speed "vehicle" , a large fan like a heli will greatly improve the fuel burn rates , but then the weight of redux gearboxes and rotor starts to become prohibitive .
My personal thoughts are that jetpacks will go the way of the "flying car" , great concept ...........but .
The Williams engine is fine for a high speed vehicle like a missile with ram compression and high velocity exhaust that matches the "vehicle" speed , things are in balance , but as with all our jet engines the fuel burn rates at static speeds is pretty poor , a bad energy conversion , slow speeds need large mass flows at modest velocities to achieve acceptable fuel burn rates for something like a lift engine
Cheers
John
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Post by racket on Oct 18, 2016 19:43:30 GMT -5
For a higher speed aircraft , yep a fan engine is certainly better , but for a GA aircraft your speeds will still be a tad low for such a small fan with only a 1:1 bypass ratio , maybe with a 5:1 it'd be getting better .
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Post by smithy1 on Oct 18, 2016 20:14:12 GMT -5
Are military turbine oil lube line labels directional? Some are.. due to check valves or flow meters etc in the lines....but most lube lines are bi-directional. Cheers, Smithy. |
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Post by smithy1 on Oct 20, 2016 21:05:27 GMT -5
That I couldn't tell you....You'd have to refer to the manufacturers manual for specific information..
It would be irresponsible for me to advise otherwise.
The engines I work on have specific steel pipe and flexible line flow directions and connections, clamps etc...we have to be spot on with aircraft related equipment, errors are not tolerated, nor should they be.
Cheers,
Smithy.
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