ACRO E-mail Archive Thread: [Acro] RE: S1S aux fuel tank capacity?
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Thread: [Acro] RE: S1S aux fuel tank capacity?
Message: [Acro] RE: S1S aux fuel tank capacity?
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From: "Fly" <fly at vigoris.net>
Date: Wed, 18 Sep 2002 01:13:17 UTC
RE: [Acro] S1S aux fuel tank capacity?It is nitpicky for an aux 5 or main 19 gals, but something else like a twin or jet with 200-400 gals. it makes a difference! When weighing something like that, I measure by hydrometer. Hot summer months, its lighter than average so if you want the lightest legal weight, use the average book figures. Cold weather, always use the the actual weight. For jet fuel, something like a 1/2 pound difference per gallon summer to winter. Also..........Peter, thanks for your reply. I missed your message at first so couldn't answer directly.. Kent Felkins Tulsa ----- Original Message ----- From: Seppanen, Kari J To: 'petera at nortelnetworks.com' ; 'Fly' ; acro at gf24.de Sent: Monday, September 16, 2002 10:13 PM Subject: [Acro] RE: S1S aux fuel tank capacity? According to Chevron, Avgas is typically 0.715 Sg or 5.97 lb/gal (US) at 60 deg F if you want to get picky.... KJS -----Original Message----- From: Peter Ashwood-Smith [mailto:petera at nortelnetworks.com] Sent: Friday, September 13, 2002 7:56 PM To: 'Fly'; acro at gf24.de Subject: [Acro] RE: S1S aux fuel tank capacity? The stock smoke tank in the upper wing is 5 gallons. I'm looking at the original 337 for my S-1T and it has all the details. As for the weight of the smoke oil. You can get that from its specific gravity. The canopus-13 data sheet from Texaco shows it's specific gravity as .85, gasoline is shown on another materials site as having a specific gravity of about .75. Therefore one can expect smoke oil to be .85/.75 as heavy as gasoline per unit volume. So, do you normal gasoline weight calculations and then multiply by 1.13 and you should be in the ballpark. After all this work you will find out you were over gross before you even put a drop of water/gas/smoke oil or anything else in that top tank ;) Peter -----Original Message----- From: Fly [SMTP:fly at vigoris.net] Sent: Friday, September 13, 2002 1:44 PM To: acro at gf24.de Subject: [Acro] S1S aux fuel tank capacity? Hi Folks, I just weighed a plans-built Pitts S1S that was built in 1979. It has the aux fuel tank in the upper wing center section but it is being used as a smoke oil tank. There is no documentation in the records for this tank. The temporary owners don't know.... plus despite my request, they filled the tank instead of draining it. It appears to have stock wings. Any guesses on the capacity of this tank? Also, what does smoke oil weigh? In the papers, I saw a 1979 sales brochure for an "Ultimate poly tank" that had a 4 gal capacity. It show a center drain. This S1S had the lines coming down the left forward center strrt. Thanks for any help, Kent Felkins Tulsa fly at vigoris.net Attachement 1: part2.html