On 1/7/2023 8:39 AM, G R Pickett via KRnet wrote:
For those who have a larger-than-VW engine, what total capacity do you
think is enough?
I’m planning for a tank in each wing, and considering a smaller header
tank behind firewall. Flying solo, I think a 3-5 hour leg is about
enough before pilot fatigue sets in. I’d like enough in the header to
fly at least an hour, with reserve.
Your thoughts?
Griff Pickett
KLXT
Griff,
Is your project a 2 or a 2S? I would suggest that you need specific
needs to tank more than 20 to 25 gallon. With that much fuel the
location will be critical for W&B. If it is a 2 I'd suggest a 20 gallon
limit and a 2S a 25 gallon limit, all for W&B considerations. Unless
you have considerable cross country trips planned you don't need a lot
of capacity for a 150 mph airplane. I have 2 each 12.5 gallon tanks but
very seldom fly with more than 15 gallon on board. That would give me a
150 mile out and back with 30 to 45 minute reserve. 25 gallon is like
adding a 150 pound passenger to your empty KR. How is that weight
distributed? If you're adding wing tanks I'd suggest making them long
and narrow and as close to the CG range as possible. Large header tanks
have their safety concerns and wing tanks have W&B concerns. Extra
fuel, any location, has performance concerns. There is no "perfect"
airplane. Build yours for your expected missions.
Larry Flesner
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