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rv9jim(at)juno.com
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 Posted: Thu Dec 07, 2006 7:01 am Post subject: : Rotax Aux Altenator switching. |
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That sounds really nice. Where did you find them?
Jim
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rparigor(at)SUFFOLK.LIB.N
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| Posted: Thu Dec 07, 2006 9:38 am Post subject: : Rotax Aux Altenator switching. |
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Hello Jim
As far as Kuntzleman combo LED position and strobe
"That sounds really nice. Where did you find them?"
Home:
http://www.kestrobes.com/
Combo Head:
http://www.kestrobes.com/our_strobe_hds.html
Double Dual Magnum:
http://www.kestrobes.com/ddm_models.html
Dual Magnum strobe under 2 amps, and for both starboard and port, red,
green and both sides aft white 2/3 of an amp total!
The lens cover is I think vacuum formed?? It is OK in clarity, not superb,
overall price is low.
Unit is not certified, and to be honest I don't care all that much if I am
absolute legal to the absolute letter of the law, paramount to me is that
my strobe and position LEDs allow me to be seen.
In my case with a Rotax 914, if you overburden the electrical system with
an approved strobe / position light system, fail your generator and kill
your battery, without electrical power to at least 1 fuel pump, well
"Silent Night" will begin to play.
Absolute/official checking to make sure position lights meet specs is not
an easy and cheap thing. I am more worried that certified planes with
approved position lights and strobes don't have the inside of lenses
dirty, high resistance wiring or less than new output bulbs.
He sells to military I think for Helicopters, and think he says they will
meet specs, but too costly to test.
I tried out my position LEDs, and for certain comparing right next to
local Beechcraft/Piper and Cessnas they work very well. The size of the
LED illumination is a bit smaller than the traditional, not much, but it
is more intense, overall very visable. Coverage as far as area of
visibility is very good with 2 wingtip Combo heads compared to Cessna and
Piper 2 wingtip strobes and 2 tip position lights and tail white from
observing on ground and from top obf building, I didn't test inflight from
below, but extrapulating from test, I am easily happy to trust my life and
all others on the ability for me to be seen.
On my Europa XS Monowheel I am going low draw strobes/position, SD20S with
LR3C main and internal generator as backup / help out with temp high loads
or low RPM, and a total loss 2200mA 13 cell NiMh backup battery in
starboard headrest. Backup battery (under 2 pounds) can run 1 pump with
autonomous wiring in seconds, even start the motor! Or for absolute
certain run the prop for an airstart. After soaring, it is true you should
consider yourself a glider once you shut down motor and treat as you can
not restart, when I do try a inflight restart and my battery that just
passed a load test the week before "opened", in seconds the NiMh can
effortless help out when in 1500 FPM sink! Can also run Main or E-Bus.
Ron Parigoris
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h&jeuropa
Joined: 07 Nov 2006
Posts: 645
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| Posted: Thu Dec 07, 2006 4:14 pm Post subject: Re: : Rotax Aux Altenator switching. |
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We also are using Jim Nelson's crankshaft driven alternator on our Europa Rotax 914. It works very well!! I have also supplied all the necessary parts to others - my local machine shop does a great job. We don't attempt to run both the B&C alt and the Rotax simultaneously. During pretakeoff checks, we verify the Rotax system is operational for use as a backup, but we use the B&C.
Note that if you use the vacuum pump drive on 912 / 914 Rotax, it rotates at a slower speed than Lyc / Cont so B&C SD 8 and SD 20 put out less current than rated. Also, a Rotax crank shaft driven alternator runs at 5000 rpm, much less than the rpm that the manufacturer rates the alternator at. B&C L60 at 5000 rpm is 46 A; L40 at 5000 rpm is 33A. We've supplied kits for both. We have L60 on our 914 - fills in the space in the engine mount pretty well.
Also note that FAR 91 requires "approved position and collision lights". In this case FAR 23 applies to experimental. Last I checked, the Kuzlemann lights do not meet the spec. But then your inspector probably won't notice or question them. We fitted Whelen lights to our Europa.
Jim & Heather Butcher
Europa N241BW
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