Re: Aircraft Scaling Problem / Question
- From: "mensanator@xxxxxxxxxxx" <mensanator@xxxxxxx>
- Date: 29 Jan 2007 17:57:21 -0800
On Jan 29, 7:38 pm, "David T. Ashley" <d...@xxxxxxxx> wrote:
I was sitting in a little airport the other day holding a die-cast model of
an airplane with about a 10-inch wingspan. The model was quite heavy (maybe
a pound).
At the same time, I was looking outside at a little Cessna with about a
35-foot wingspan, and I know it weighs about 1,500 lbs. empty.
Then I thought ... if the little model was built comparatively the same as
the actual airplane, what would it weigh? (And out came the pad of paper.)
I figured that the ratio of wingspans was about 40, so I did the math as:
(1/40)(1/40)(1/40)(1,500 lbs.) = 0.3 ounces.
Did I do the math right? Are little airplanes so light that one with a
10-inch wingspan should weigh less than half an ounce?
Am I missing something?
How much do you think the Cessna would weigh if it were die-cast?
--
David T. Ashley (d...@xxxxxxxx)http://www.e3ft.com (Consulting Home Page)http://www.dtashley.com (Personal Home Page)http://gpl.e3ft.com (GPL Publications and Projects)
.
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