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Journal of Space Flight, v. 2, issue 9, November 1950
Page 2
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2. THE JOURNAL OF SPACE FLIGHT V= [square root of] g R H/R + H Formula No. 1 where V is the velocity in miles per second R is the radius of the earth equal to 3959 miles g is the acceleration of gravity or .006098 miles/ sec. H is equal to R sine1/2 [[underlined]a [/underlined] Referring again to the illustration, the tangent to an ellipse is normal to the bisector of the angle between the focal radaii. The tangent to the circle normal to the focal radius is the line T-F [subscript]1[/subscript] . The angle between these two tangents is designated as [underlined] b[/underlined], and is also the takeoff angle. Inspection of the figure shows that this angle is given by the expression [transcription unfinished]
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2. THE JOURNAL OF SPACE FLIGHT V= [square root of] g R H/R + H Formula No. 1 where V is the velocity in miles per second R is the radius of the earth equal to 3959 miles g is the acceleration of gravity or .006098 miles/ sec. H is equal to R sine1/2 [[underlined]a [/underlined] Referring again to the illustration, the tangent to an ellipse is normal to the bisector of the angle between the focal radaii. The tangent to the circle normal to the focal radius is the line T-F [subscript]1[/subscript] . The angle between these two tangents is designated as [underlined] b[/underlined], and is also the takeoff angle. Inspection of the figure shows that this angle is given by the expression [transcription unfinished]
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