Mr. Edwin Hopkins and Mr. Paul DeKilduchevsky, both from New York, were the builders of two types of engines of which no details are known except that they were manufactured in 1910 and had between 30 and 40 HP one, and between 60 and 80 HP the other. Also known as H-DeK. (and HdeK).

-They were 4-cylinder inline engines and whose information is at the Nasm (BH-005000-01) and Fot. (BH-005000-20). HdK.

From Appendix 10: We have not yet located images of these two engines manufactured around 1910-11.

-But we do have an ad that appeared in the "Aeronautics" magazine that same year.

"An ad of this brand in 1910"