flyrotary@lancaironline.net Mailing List Archive

Thanks Ed and Charlie,

You both got the same answer, I think the 1.8 gal. estimate came from my first mock-up and it was 14 in. instead of 15. In some of my calculations I did get 2.0 +something as an answer. Now how much sump tank volume is really needed? I think Perry Mick uses one slightly over a gallon. If one gallon is sufficient, then I can save 6 pounds of usually unused fuel.

I regret hearing about George Graham, I was hoping to meet him, he sent a drawing of his cooling set-up and was always ready to help.

Wendell

You can look at your tank as composed of two boxes (actually one and 1/2 boxes). 1st box is 3.75" x 6" x 15" = 337.5 cubic inches.

A second box is 3.75 " x (11-6)" x 15" = 281.25 Cubic inches but you really only have 1/2 of this box, so triangular section volume = 1/2 (rectangular section) volume = 281.25 * 1/2 = 140.625 cubic inches

So total volume = volume of 1st box (337.5 )+ 1/2 volume of second box (140.625) = 478.125 cubic inches or 2.07 US Gallons

Ed

----- Original Message -----

From: Wendell Voto

To: Rotary motors in aircraft

Sent: Saturday, August 25, 2007 1:19 PM

Subject: [FlyRotary] Re: need help

Thanks for the responses to my requests.

I wasn't to go John Slade's route and try to put in an air conditioner and the lines need to take 250 to 300 psi. The larger return line should only see about 175 psi on a hot tarmac (engine off) and the feed line will see up to 275 psi (assuming a inefficient condenser) on a hot day.

Finding a place for the condenser is the main problem as I see it.

I'll look up Mazdatrix for the exhaust studs. I hoped someone knew the exact size so they could be purchased locally.

Here is a math problem for you brain types (all rotary head but me) -how much fuel will a tank hold that is 3.75 in. tall, 15 in. long, 11 in.deep on the bottom, top is 6 in. deep then slopes to zero at the front? I think it is about 1.8 gal.

___6in._

| \

|_________\

11in.

Wendell

In a message dated 8/23/2007 8:29:10 PM Pacific Standard Time, jwvoto@itlnet.net writes:

Hey guys,

I still need help in obtaining the nuts for the exhaust studs on the 13b. Also, does anyone have working phi ratings for 3003-0 aluminum tubing. Can it withstand 250psi

Wendell

What wall thickness Wendell? .010 thick NO! 1 inch (wall) yes. Give us an idea of what you are using it for.

Bill Jepson

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