Recent content by Michael Hope

For those interested, here is my video of this Firefly at start up. https://www.youtube.com/watch?v=z-s71MMuu1k

On a Hamilton Standard 23E50/23EX, the bottom of the blade butt would be 2.813 inches, less the thickness of the blade bushing. I assume that the DeHavilland propeller would be similar.

Sorry for the late response, I do not have any access to DeHavilland branded propellers documents.

Based on the Hamilton Standard E shank blade and 3E50 propeller the blade butt would be 2.938 inches out from the center of the propeller rotation, so add 74.62 mm to the length of the blade as it stands, then double it, would get you full diameter of the propeller.

I do not know the exact length. The length of a single blade would one half of the diameter when installed in the propeller, i.e. the radius. The blade removed from the propeller/hub you would take off two to three inches as a guess based on other propellers manufacturers.

The length and width of the blade shown are similar to the 6477A-0 blade.

By my view of the images of the blades and how the layers of the wood have been layed up, they appear to be Right Hand Rotation

From the way the wood has been laid up, they appear to be righthand rotation. For example: a righthand rotation blade would be used on a Merlin engine as one of many different engines. But it would NOT be used on a Griffon engine as they are lefthand rotation, unless part of a contra rotating...

Not sure of the aircraft, but the blade is a left-hand rotation blade so not for a standard merlin engine, more likely for a Griffon engine. You can confirm the blade rotation by looking at the Sensenich fix pitch in the background, as Sensenich do not manufacture an aluminum propeller with a...

The MT propeller was designed for the F82, and now certified for the P51. Here is the MT Propeller news release link for the Propeller. https://mt-propeller.com/en/entw/news.htm MT propeller through his other company also is having licensed built replacement H/S aluminum blades for the P51...

The T28 used the 43D50 propeller with the standard 50 shaft splines. The S-2/Tracker used the 43D51 propeller, which had different splines for the shaft, as the R-1820 were from a different use previously, I was told the S-2 engine were originally intended for use in tanks, so a different...

Another source of paddle propellers would be for a C-54/DC-4, F4U Corsair or the TBM/TBF Avenger Torpedo Bomber, they blade is a 6507/6501/6541 of 13 feet in diameter. The Lancaster used the 6519-0 blade at 13 feet in diameter; the 6519 had a slightly greater width in the inner 50 percent of...

Here is the required blade markings per EO 15-30A-3 from about 1952. There are three different blade drawing numbers/models possible for the 2B20 propeller are "6109A-?", "6135A-?", and "6241A-?". The"?" is the blade cutoff, the cutoff depends on the aircraft that the blade is installed on.

The 6101 blade can be used in the Hamilton Standard model 2D30, 12D40, and the 3D40 propeller, with a 9 foot basic diameter for the -12 blade. For the 2D30 one possible use with the -12 blade is on the DHC-2 Beaver.

The shank design number is visible as 5690?, the only similar shank design number is 56904. The diameter of the shank was reported as about 6 3/4 inches which matches the "D" shank blade design. The 56904 is for D shank blades. Possible models that used the 56904 where the following per H/S...