REFLECTOR: 28 volt instruments/avionics

[Brian Michalk]

I think 28V is a great idea.  Most (new) avionics don't care.
I think even new Ford cars are 28 volts these days ... or are they 
"about" to be?

It would be quite efficient, better than 90% to run a buck converter to 
power those things insisting on 12 volts.  If I were to build again I 
would seriously consider going 28volts.

Douglas Holub wrote:
> One of the arguments against a 28 volt system is that avionics and 
> instruments are more expensive. I think that was more true in years 
> past then it is today. Most avionics designed in the last 10 years 
> accept 11-33 volts.
>  
> And here's an advantage that will go away if more of you start 
> designing 28 volt systems: there is less demand (fewer bidders) on 
> Ebay for 28 volt instruments and avionics. At least that's my 
> impression. Just today I got a used whiskey glass compass for $25 on 
> Ebay. I was the only bidder, and I think it was because it uses a 28 
> volt light. A couple of months ago I bought a used Narco 811 for $450. 
> The 811 is 28 volts only. I saw a used Lamar 2401 starter sell for $15 
> plus shipping yesterday. I was sorry to see that, because I paid $100 
> for one last month.
>  
> Doug Holub
> scrounging for parts
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