From: "Charlie England" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Alternative Fuel Pump
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Date: Sun, 26 Mar 2017 22:59:52 -0500
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If you're using ATC style fuses, these might be worth a look.
http://www.cooperindustries.com/content/dam/public/bussmann/Transportation/Resources/catalog_pages/BUS_Tns_227_ATC_CB.pdf
or
http://www.cooperindustries.com/content/dam/public/bussmann/Transportation/Resources/catalog_pages/circuit-protection/bus-cbt-ds-series-22x-circuit-breakers.pdf

If you look at the trip time vs overload %, they act pretty much like a 
regular circuit breaker instead of a fast blow fuse, and they fit a 
regular ATC fuse block.

Won't fix a bad pump, but if you get a higher capacity regulator & make 
sure your pumps are ok, they should solve nuisance trips.

Charlie

On 3/26/2017 10:47 PM, steve Izett wrote:
> Thanks very much Jeff
> Steve Izett
>> On 27 Mar 2017, at 9:57 am, Jeff Whaley <flyrotary@lancaironline.net> wrote:
>>
>> Steve, I don't place a lot of confidence in the accuracy of my fuel pressure gauge as it's only 1.25 inch diameter - more of a yes there is fuel pressure indicator; however, with either the Airtex or the Walbro's I saw/see a few PSI change from (36-37) one pump on to both (39-40).
>> With the Airtex I routinely would operate on one pump for cruise and two for take-off and landing.  With the Walbro"s I have been operating both pumps all the time; have checked one pump airborne and there is definitely a slight leaning.
>> Have never actually measured current draw but as stated a few days ago I am using aircraft grade switched-breakers of 10 Amps for each pump.  Hope this helps.
>> Jeff
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