with a Predator at 12s lipos and a 28,5x12" Rasa CFK Prop you will have a thrust of approx 24 Kg.
This means a load voltage of approx 43V and a current of approx 150A at 5600 rpm
With your 28x14" the trust will be a bit lower and the current a bit higher.
You have to pay special attention to the cooling of the motor.
No warranty / liability by the use of the Xtra-, Terminator- and Predator-motors on devices for the transportation of persons.
When using a fixed propeller suffizient cooling , insinde the motor, must be provided.
Best regards
Mit freundlichem Gruß
Manuel Wuest
TEAM Plettenberg
So that seems promising. at least they are willing to play.
Here is another type of motor(s) from Hackett the C50 quad and available as a twin.= to 120/150cc engines swings a 30x10 or 12 inch props wieghs 2.5kg But way expensive $3250au for the quad and $2000 for the twin.
It is a toss up between sitting back and wait 6mths and see what our paragliding friend comes up with. or keep going and throw some hard earned 'readys' on the counter and hope it doesn't end in tears.
Statistics: Posted by ozzie — Wed Dec 06, 2006 3:26 am
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estemated price at 5500us
http://www.marksparaglidingpages.com/fo ... c.php?t=56
also another video to stream on home page.
Statistics: Posted by ozzie — Mon Nov 27, 2006 3:27 pm
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Regeneration
If you can plan a route that involves a nice downhill on your way home, you can take advantage of the regenerative braking of the HT and get a charge up on the batteries to get you home. If your route home involves an uphill, take it easy and don't go fast.
website for batteries http://www.laptopsforless.com/segway-battery/
Statistics: Posted by yankeflyer — Sun Nov 26, 2006 5:23 pm
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here is a link for a few more photos and a vid of him flying it.
stream it or download. dialups be patient it is 28mb it took 2 hrs to download. but well worth it.
there is also an interview with him at this link
http://www.worldtalkradio.com/archive.asp?aid=7170
pretty interesting.
btw. that predator motor is retailed at 995us$
Ozzie
Statistics: Posted by ozzie — Thu Nov 23, 2006 3:32 am
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Solar power! Now you talk.
That would be real nice!
Not even having to charge.
Great in your contry with all that sun!
LAZAIR 4 EVER
Statistics: Posted by LAZAIR 4 EVER — Thu Nov 16, 2006 6:28 pm
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seems like a tough road to get your wings fixed. but no one seems to get it right the first time around. something that no one mentioned about picking up the holes for the new skin. i found on mine from previous repairs that a lot of holes had been drilled out off centre (butchered) and a 1/8 rivet was pretty useless so i used 3/16 were needed.
I've been reseaching away on these engines. the thrust figures are pretty impressive. they leave the pioneers for dead. A couple of things that pop to mind is they say they fly models around 30lb in weight. would the bearings be able to handle the weight of the Lazairs without pulling the shaft out? And could we run our nylon props on these engines. the pitch and diameter used on there tests seem close to our blades. (although to date, no one has seemed to work out the pitch of our props.) Will torque or lack of it, be a factor to spin the prop up to rpm?
I had a look at the predator that you metioned so small for the size.
I have seen the photos and video of the guys from Toronto area that made the packpack they state 75kgs of thrust takes three to hold it. the time to full thrust from off is twice as fast as any combustion engine. It would have to be like comparing the smoothness and "real" power of say a PT6 turbine to a big radial. They also burnt out a couple of controllers. Shame the photos do not show any real detail but looks very neat.
I live not far from our state university that have a dedicated photovolatic dept. they build the solar powered cars that race down thru the centre of Australia very high voltages 400 plus. they have released some very early plans for their hub motors you can build if you want. but other than that they are very tight on giving out info.
be nice to cover the wings with their lightweight high efficiency panels as the next step.
Statistics: Posted by ozzie — Thu Nov 16, 2006 3:25 am
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They get scared and they'll refuse to sell you anything.
By the way! I fixed one of my leading edge very easely. It took me like five minutes to get it right with the carpet methode from Dale.Thanks Dale!
But the other leading edge was much more complicated.
I could not get the bend right where I wanted it. and ended up folding it too much so I had to bring it to a friend of mine that as a break to get it flat again. But than we maid some creas in the sheet metal so I still have to try it again.
But I am sure that with new sheet metal it would be very easy to do, once you have located where you want you radius.
I was looking at a frensh site it is called APPULMA.
On their link there's a site that was talking about an electric back pack for paramotors and these guys get fouty minuts for 90lb of trust for sixty somme pounds weight of total equipment. So! You know we don't need the big hoop around the prop and the motor weight is wayyyy!!!!! less which lives lots of over for battery weight.
fourty minutes is a lot.
Bob Bouche is an expert at electic systemes of this type. He ownes a conpany called astro flight which sells high performence motors and controler for big models. he would know what controler to use on that type of rigg.
Thanks!
LAZAIR 4 EVER
Statistics: Posted by LAZAIR 4 EVER — Wed Nov 15, 2006 6:37 pm
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