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Does the STC for upgrading to a C-85 require a second wing tank?
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No, not as I understand it. There is a formula for fuel capacity, and an 85 requires 12.75 gallons. The nose tank only holds 12, so that is not enough. A 6 gallon wing tank, or maybe even the 6 gallon fuselage auxiliary tank would meet the requirements. I even wondered if a header tank like from the Swick T would be enough to meet the requirements. -
Where is the formula? Is it in CAR 3 or the STC or ??? I'd like to see the specifics for another project.Regards,
Greg Young
1950 Navion N5221K
2021 RV-6 N6GY
1940 Rearwin Cloudster in progress
4 L-2 projects on deck (YO-57, TG-6 conv, L-2A, L-2B)
Former Owner 1946 BC-12D's N43109 & N96282
www.bentwing.comComment
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CAR 4a 605. It is .15 gallons for each maximum horse power. 85 x .15= 12.75Comment
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That pesky 1/2 full for takeoff changes it to18.75 so as I have heardN29787
'41 BC12-65Comment
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I'm not sure where that comed from. The TCDS shows 18 gallon capacity for the BC12-D-85. There are Aeronca Champs that have 85 horsepower with 13 gallon tanks.Originally posted by astjp2 View PostComment
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