CHAPTER XII.

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V. E. Johnson

EXPERIMENTAL RECORDS.

A model flying machine being a scientific invention and not a toy, every devotee to the science should make it his or her business to keep, as far as they are able, accurate and scientific records. For by such means as this, and the making known of the same, can a science of model aeroplaning be finally evolved. The following experimental entry forms, left purposely blank to be filled in by the reader, are intended as suggestions only, and can, of course, be varied at the reader's discretion. When you have obtained carefully established data, do not keep them to yourself, send them along to one of the aeronautical journals. Do not think them valueless; if carefully arranged they cannot be that, and may be very valuable.

Experimental Data.
Form I.

Model Weight Area of
Supporting
Surface		 Aspect
Ratio		 Average
Length of
Flight in
Feet		 Maximum
Flight		 Time of Flight
A. average
M. maximum		 Kind and
Direction
of Wind		 Direction
of
Flight		 Camber Angle of
Inclination of
Main Aerofoil
to Line of
Flight
A M
1
2
3
4
5
6
7
8
9
10
11
12

Form I.continued.

Model Weight
of
(Rubber)
Motor		 Kind of
Rubber
Flat,
Square or
Round		 Length in
Inches and
Number of
Strands		 Number
of
Turns		 Condition
at
End of
Flight		 Number of
Propellors
and
Diameter		 Number
of
Blades		 Disc Area
and
Pitch		 Percentage
of
Slip		 Thrust Torque
in
Inch-
Ounces
No. Diam. DiscA. Pitch
1
2
3
4
5
6
7
8
9
10
11
12

                                                                                                                                                                                                                                                                                                           

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