Sounds like an outrunner would be the choice for a glider wheel, enough
acceleration to allow a jet sustainer to self-launch.
Jim
------ Original Message ------
From: "Mike Borgelt" <[email protected]>
To: "Discussion of issues relating to Soaring in Australia."
<[email protected]>
Sent: 9/20/2016 5:11:27 PM
Subject: Re: [Aus-soaring] electric self launch
It is just structural engineering. Put the right amount of material in
the right place.You can see the pivot shaft in the videos.
I suspect the entire turtledeck fairing is non structural.
That motor design is in all sizes from very small to many 10s of
kilowatts. It is called an outrunner. More torque at lower rpm so you
don't need a gearbox. The electromagnet coils are fixed and the case
has the permanent magnets inside it and rotates with prop attached. No
brushes as they are 3 phase AC. The 3 phase is generated by solid
state electronics and the current is pulse width modulated for power
control.
So an electric self launch, light weight, 50:1 15m glider capable of
flying at 60 Kg/sq m with built in ballistic chute. If they go as good
as they look I think Peszke's main problem will be ramping production.
Mike
At 07:17 AM 9/21/2016, you wrote:
Very nice. Rapid extension and retract. I have seen that motor
somewhere before.
I did like the large access panel to the motor compartment. Not sure
how they maintain adequate strength in that area.
On Tue, Sep 20, 2016 at 7:25 PM, Mike Borgelt <
[email protected]> wrote:
At 07:04 PM 9/20/2016, you wrote:
Any  good links?
I found a schematic diagram which indicates that the motor has a
pusher folding prop. Not sure how it retracts and fits in the
fuselage with the blades sticking up?
Here you go: http://www.gpgliders.info/technik/ Scroll down to the
videos. They took quite a while to load here. The link seems slow.
Sheer bloody genius I think.
Mike
Borgelt Instruments- design & manufacture of quality soaring
instrumentation since 1978
www.borgeltinstruments.com
tel:Â Â 07 4635 5784Â Â Â Â Â overseas: int+61-7-4635 5784
mob: 042835 5784Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â :Â int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
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_______________________________________________
Aus-soaring mailing list
[email protected]
http://lists.base64.com.au/listinfo/aus-soaring
Borgelt Instruments- design & manufacture of quality soaring
instrumentation since 1978
www.borgeltinstruments.com
tel: 07 4635 5784 overseas: int+61-7-4635 5784
mob: 042835 5784 : int+61-42835 5784
P O Box 4607, Toowoomba East, QLD 4350, Australia
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