By the way,

does anyone know a source for OEM-style switches?
I would like to get some extra equipment for my Toyota, but
a) OEM switches are outrageously expensive
b) Not in stock either...

I know there are manufacturers that supply specifically that market, but

some reason I am not capable to find any!!

Thanx for your help,

Thomas J.


----- Original Message ----- From: "Chris Sargent" <rv7rotary@knology.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, February 18, 2007 6:57 PM
Subject: [FlyRotary] ATC fuses with manual or auto-reset


>
> Waytek sells the ATC fuses below that have either a manual or auto-reset
> capability.
>
> This offers some options to those deciding between circuit breakers or
> fuses.
>
> Link to the Waytek PDF catalog page:
>
> http://order.waytekwire.com/IMAGES/M37/catalog/219_083.PDF
>
>
> 5-30 Amp, low-profile, manual reset (Type 1)
>
> 10-30 Amp, manual reset (Type 1)
>
> 10-30 Amp, auto-reset (Type 3)
>
>
> 5-30 Amp w push-to-trip test feature
>
>
> Regards,
> Chris Sargent
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
> Behalf Of Bulent Aliev
> Sent: Sunday, February 18, 2007 7:19 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: CBs and fuses
>
> In my plane for everything electrical I installed, I asked myself:
> can I fly without this item? And accordingly decided on CB or fuse.
> A CZ builder had followed the plans and had installed the electric
> nose gear fuse in the "per plans" location under the passenger seat.
> He takes a passenger for a flight, but on retraction, his nose wheel
> is cocked , hits the bottom of the fuselage and pops the fuse.
> Something goes wrong with the manual override too. Now he asks the
> passenger to unbuckle, turn around and put his butt against the
> windshield, so he can replace the fuse while flying the plane at the
> same time. If he had spent few dollars on a CB, he could have pushed
> it in and flown with the gear down.
> Buly
> On Feb 18, 2007, at 7:35 AM, Thomas y Reina Jakits wrote:
>
>> Hi Al,
>>
>> interesting!!
>>
>> Next chance I have I will try to find out more about this
>> (reasoning for use of fuses over CB's in this helicopter).
>> I don't really buy the "repair after trip" -reason as the result is
>> the same.
>> Whatever caused the fuse or CB to trip, it should be repaired. What
>> really happens is that the fuse is replaced - if it doesn't trip
>> immediately, no one will look any deeper into it, than a
>> "look" (unfortunately...), .... until it trips again.
>> A lot of trips can be caused by changing environment (heat,
>> humidity, etc.) that bring the conditions for over current just to
>> the trip point, but will not under normal conditions.
>> However I am no specialist, not even building anything at this time
>> - so, I will try to find out for this specific application (AS350B3)
>>
>> Thomas
>>
>> PS: First thing I am going to do is to consult the Maintenance/
>> Repair manual....
>> ----- Original Message -----
>> From: Al Gietzen
>> To: Rotary motors in aircraft
>> Sent: Saturday, February 17, 2007 6:10 PM
>> Subject: [FlyRotary] CBs and fuses
>>
>>
>> Eurocopter Factory Instructors are VERY COMPETENT in Eurocopter
>> Helicopter Systems!!
>>
>> There is absolutely NO doubt that he knows the difference between
>> fuses and breakers and WHY either one would be used.
>>
>>
>> Thomas;
>>
>> Certainly not impugning the competence of the flight instructors;
>> just suggesting the design engineers may have other reasons than
>> cost.  One may be reliability.  The reliability of CBs goes down
>> significantly after they have experienced a 'trip'.  I recall
>> reading one experts opinion that a CB should be replaced after a
>> 'trip'.  Yeah; seems extreme.  The modern philosophy of circuit
>> design is to design for fault tolerance, so a fault; once causing
>> the protection device to open, is left for repair when you land.
>>
>>
>> The key for using fuses is fault tolerant circuit design and proper
>> selection and sizing of fuses.  Having done this; studies suggest
>> that the fuse offers higher reliability and lower cost.
>>
>>
>> There certainly reasons for either CBs or fuses, and I have both in
>> my plane.  For my flight critical circuits I opted for simple,
>> fault tolerance and fuses.  I wouldn't argue with someone making a
>> different choice.
>>
>>
>> FWIW,
>>
>>
>> Al
>>
>>
>
>
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