Notes and Responses From Readers
For those of you who missed it, in our last issue Doug Nash wrote to report the finding of a Crown engine. Doug wrote an article on the history of Crown Motor Works (see GEM, April 2002).
Doug tried to get a photo to us last issue, but wasn't able to get it off to us in time. This issue, however, we have a photo, and it's of the HP Crown engine belonging to Chuck Werntz of St. Peters, Mo.
As the photos show, Chuck's engine is nearly identical to a HP engine shown in surviving Crown Motor Works literature. With the discovery of Chuck's engine, a total of three Crown engines are now known to have survived.
I appreciated the recent thread on shimming gas engine bearings (see GEM, July 2002,) and would like to add my two cents.
Some of the old-time California engine builders used a thick card stock for main bearings. I know this because I was fortunate enough to find a 5 HP Samson in like-new condition. The main bearing caps had never been disturbed, and when I removed them I found the shims had been coated with white lead. When the white lead hardens it bonds itself to the shims, bearing caps and frame, creating rigidity in the bearing assembly.
You can use lock washers on main bearing bolts, but only if the bolts are torqued tight. If the bolts only partially crush the lock washers the bearing cap will 'walk' and the crankshaft journals will eventually wear out of round.
Also, it's my experience that connecting rods on small engines should always be shimmed with a non-compressible material. Cardboard, rubber or canvas will eventually take a set and loosen, and when the shims become loose the rod cap floats.Lester Bowman,175 N. Santa Ana Modesto, CA 95354 (209) 527-4665
I'm looking to find the origins of a great bit of early gas engine technology now lost for many years, and I'm hoping someone out there might be able to help.
Back in about 1906 or so, Fred and Augie Duesenberg started building their own racing car and marine engines. They had pairs of cylinders cast en bloc with the heads. These engines were as big as 361-cubic inches and had two camshafts on either side of the block operating two horizontally opposed valves (HOV) set over the top of the cylinder bore. Valve motion from cam to valve was by 12-inch long rocker arms, often called walking beams (after stationary steam engines?). The 1911 Delage (successful French racing cars that did well at the Indianapolis 500 in 1914, 1915 and 1916) had the same HOV arrangement but used a push rod/rocker arm setup rather than walking beams.
I've seen a diagram of an unidentified stationary/industrial single-cylinder engine in an old Dykes Encyclopedia that had a similar walking beam for the exhaust valve facing an atmospheric intake valve.
Can anyone tell me if walking beams and horizontally opposed valves were ever used on stationary, tractor, marine, automotive, agricultural or industrial engines? I'm looking for any kind of data, drawings, photos, advertisements, etc., even if they are only photocopies. I'd like anything that shows the first emergence and application of an idea that came and went.Ralph Gustafson , 2567 Wilcox Terrace Victoria, BC, Canada V8Z 7G5, (250) 652-1864 E-mail: email@example.com
In regards to the article on the Golden Gate tractor (see GEM, June 2002): There is a reference to the Golden Gate tractor in the 1917 Cooperative Tractor Catalog, but nothing in the 1916 or 1918 catalogs. The 1917 issue does not include a picture, but provides the following text:
Golden Gate 10-20 1917 Golden Gate Gas Tractor Co. Berkeley, Calif. Four wheels, driving from two rear wheels.
Recommended for three 14-inch plows, 20-inch thresher. Length 120 inches, width 50 inches, height 54 inches. Diameter of drive wheels 54 inches, face 12- inches. Weight 4,500 pounds. Price $1,750. Four-cylinder vertical motor, cast en bloc, 4- x 5-, rpm 750 normal, L-head. Stromberg distillate carburetor.
Bosch high-tension magneto. Centrifugal pump, fan and Perfex cellular radiator. Splash Lubrication. Spur gear final drive, enclosed. Finished hardened alloy steel gearing. Timken roller transmission bearings.Jack Alexander, 7795 Crews Road Gilroy, CA 95020
Send letters to: Gas Engine Magazine, 1503 SW 42nd St., Topeka, KS 66609-1265, or e-mail: rbackus @ ogdenpubs.com