Page:Goddard papers - goddardmay1926.djvu/4

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Dr. C. G. Abbot -- 4

work is not satisfied with the flight of March 16, it will be necessary to make the rocket on a larger scale, in order to increase the lift in proportion to weight. I believe that such a larger model can be made for $500. Incidentally, however, some of the materials would require from three to five weeks for delivery.

On the other hand, I believe that to make this additional trial flight would be a waste of time and money, for several reasons. First, all the principles involved in the construction of a rocket to beat the altitude records have been worked out satisfactorily. Further, the latest model, although useful, no doubt, for some work, and representing the acme of simplicity, makes accurate control of combustion a difficult matter, and does not permit the use of extremely light fuel tanks, which do not have to withstand pressure. Hence I should not consider using the principle of the latest model in a rocket intended for reaching great heights, and I cannot predict beforehand just what can be accomplished by its use.

I should be glad to come to Washington, if you so desire, to make clear any matters connected with the work, and discuss plans for the development of a rocket to reach great altitudes. In the meantime, I would appreciate it if no public statement, such as recently suggested by Acting Secretary Wetmore of the Institution, were made before I had opportunity to supply such details as it may seem desirable to include.