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Pitts S1 Wiring Diagram

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mac(at)incendio.co.nz
Guest

Posted: Sun Dec 28, 2008 9:56 pm Post subject: Pitts S1 Wiring Diagram

Hi all.. been trawling through all the posting history on this list looking

for some help with what layout and equipment set make sense in the tight

engine compartment of a Pitts S1. Sorry if any of this is repeat/old stuff,

but it's all new to me. Thanks also to Bob who has given me many hours of

enjoyment trying to get to grips with his manual, and Z figures. I started

on Z13/8 and pulled out the 2nd big alternator in favor of a single small

SD-8 one, and have gone from there.



A Pitts should be rather simple, I would have thought. This is a VFR

short-hop plane 99% of the time, doing aerobatics I had a good look at the

aerobatic wiring diagram from B&C... so I had assumed I could get by on a

SD-8 alternator as only electrical generation source. I have a Icom A200,

Narco Xpdr, Encoder and the usual engine instruments (EGT, CHT, OILT, OILP,

FUELP) so thought I could get away it. Um, ok, also a Fuel boost pump (only

during starting) and smoke pump (couple of minutes a flight)... I also would

like to run a AV80R GPS as well, if possible. Now I'm wondering about the

SD-8... and if not, well, then the SD-20. I can add up all the Amp loads on

each thing, but I'm not sure how much under/over capacity I need to run

everything? Is there a general rule of thumb?



My other question is whether there is enough space behind the engine for the

vacuum mounted SD-8 - considering I'm planning dual PMAGS, and have an

inverted OIL kit right there in the same place. A friend building an S1 that

I talk to a lot as opted for the PlanePower 60Amp unit that is belt driven

up front to free up some space, as he reckoned it was too tight. Would love

a second opinion from someone with an S1.



Most S1's flying out there are 20, 30 years old, even older, and I'm hoping

someone can help me take advantage of the new technology advances to build a

simple, clean and lightweight electrical system.



Thanks to anyone who can help.

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john_rv10(at)yahoo.com
Guest

Posted: Sun Dec 28, 2008 10:48 pm Post subject: Pitts S1 Wiring Diagram

Hello Stuart,



I have an S1 with an SD-8, standard slick mags and an inverted oil system.

It is tight but doable.



Cheers,

John 



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mac(at)incendio.co.nz
Guest

Posted: Sun Dec 28, 2008 11:05 pm Post subject: Pitts S1 Wiring Diagram

Great, thanks John. What line up do you run - VHF, XPDR, GPS, etc?  

Don't suppose you have a picture of the back for me to have a look at?

Sorry, but now you got me started 



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john_rv10(at)yahoo.com
Guest

Posted: Mon Dec 29, 2008 2:34 am Post subject: Pitts S1 Wiring Diagram

Stuart,



I run a VHF, a smoke pump and a Garmin 296 plugged into a cigarette lighter

outlet for power if required. All the rest are steam gauges, and the fuel

pump is manual.  



Since most my trips are short aerobatics trips, the biggest consumer is the

starter motor, and the SD-8 is more than adequate to keep the battery

charged even if I do a series of 10 to 12 minute sorties. On longer trips

the SD-8 has much longer to catch up, and it has never been an issue. This

system, apart from the 296, has been in satisfactory operation since the

early 80s.



Sorry, no photos of that area, but the next 100 hourly is due late January,

and if you still want photos then, I am more than happy to snap a few and

send them off line to you.



Cheers,

John



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