Macleod dna project

Sir Dugald Clerk (1854-1932) was a Scottish engineer who designed the first two-stroke engine in 1878 and patented it in England in 1881.

Mcleod history

Clerk's name is also rendered as Clark in some sources e.g. the University of Glasgow where his papers are archived.

He was a member of the Royal Society and winner of the RSA Albert Medal in 1922 under Clerk and the international intellectual property firm he formed with George Marks is Marks & Clerk.

The Encyclopedia Britannica lists him under Clerk.

Sir Dugald had no children but his nieces, nephews and their descendants have always used Clerk.

The Clerk cycle engine uses a similar valve arrangement to the four stroke cycle diesel engine, with both exhaust and inlet valves in the cylinder head and operated by a camshaft.

At the end of the power stroke, both exhaust and inlet valves open, and the cylinder is filled with fres