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Nov 18, 2010, 02:19 PM
Metallica
robe_uk's Avatar
Great detail Antony, would temp me into trying to make one myself, how do you space the magnets so evenly around the disc?
For testing I think thrust verses Amps would be the main measure for testing and comparison.

Rob
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Nov 20, 2010, 11:50 AM
R.O.V. Man
hargard's Avatar
Thread OP
Hi Rob
Quote:
Originally Posted by robe_uk
how do you space the magnets so evenly around the disc?
I got a old gear wheel with holes on the inside that matched the PCD that I wanted.
Made a centre pin then clamped them together.
Drilled pilot holes then drilled out and then ream out to the size wanted.

Will compleat thrusters on Monday sometime.
Then the testing will start.

Regards Antony(UK)
Nov 21, 2010, 03:23 PM
R.O.V. Man
hargard's Avatar
Thread OP
Hi
Updated version of Seal in thruster body.
Easer to assemble the joint. O ring would not seat without twisting.
Cutting O ring groove is easy.
Can even use two O rings if wanted.(Not necessary).

Regards Antony(UK)
Dec 03, 2017, 07:40 AM
Registered User
IMO a Rim-Driven-Propeller or thruster is totally doable.

In a nutshell the propeller would be magnetically (passively) suspended within the stator. The general form would be similar to how an inrunner motor is setup. Beyond that the only limitations I can really think of is the weight as the magnets surrounding the rim / stator would be at least twice whats currently used with a quads outrunner motor and the stator would need to be custom built. It could fit nicely between prop and EDF driven systems as it has many strenghts of both.

Advantages:
-Good thrust per watt ratio.
-High torque & fast spool up.
-Zero prop tip loss.
-Safer as it comes pre-ducted.
-Prop tips could be engineered to pivot to vari the blade pitch.
-Quiet operation.
-Higher RPM's
-Only one moving part so design would be pretty simple and rugged.
-No ball-bearings (Passive Magnetic Bearings)
-Could replace EDF's in some applications.
-Should be able to use commonly avalible ESC's.
Last edited by 1Smug_Bastard; Dec 03, 2017 at 08:40 AM.


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