JackG Posted September 16, 2013 Share Posted September 16, 2013 Would they basically be same process, as say wooden Rotol props? Is there a metal sheath present on the leading edge (how important is this piece?) and if there was metal present, did war shortages affect this in later years? Anything specific for the Dora prop - would be greatly appreciated. regards, Jack Link to comment Share on other sites More sharing options...
Arniec Posted September 17, 2013 Share Posted September 17, 2013 Hi Jack, Take a look here. Maybe this is what you need. http://www.warbirdsforum.com/topic/3472-bf-109-propswood-or-steel/ Cheers, Link to comment Share on other sites More sharing options...
Work In Progress Posted September 17, 2013 Share Posted September 17, 2013 (edited) Is there a metal sheath present on the leading edge (how important is this piece?) Absolutely crucially important. Without a metal sheath on the leading edge, the life of a prop blade is potentially very short. By "very short" I mean that just flying through ordinary heavy rain can convert an unsheathed prop blade into a shapeless blunt club, incapable of turning horsepower into thrust, within maybe 10 or 12 minutes. If you can guarantee that you will only fly in daytime visual meteorological conditions, and therefore know that you will never deliberately or inadvertently fly into precipitation, then an unsheathed wooden prop is OK and you will see them sometimes on small light aircraft. But to be honest it's silly not to have a sheathed leading edge: it's only a small part of the cost of a wooden prop blade. In these modern times there are composite sheathing options too, but you know where you are with metal Edited September 17, 2013 by Work In Progress Link to comment Share on other sites More sharing options...
tank152 Posted September 17, 2013 Share Posted September 17, 2013 I've just taken a look in my Eagle-Editions Dora book vol 2 and there is no mention of metal sheaths being used on props VS111 or VS9. These props were 3.5 diameter, laminated and covered with an oilcloth material. Link to comment Share on other sites More sharing options...
JackG Posted September 17, 2013 Author Share Posted September 17, 2013 (edited) Thanks for those responses, if anyone has more info to add, please do so. In the posted link, a member gave this list of prop types: VDM 9-12067 A : metalVDM 9-12153 A : metal with external pitch weightsVDM 9-12176 A : wooden Were they for the ground attack version, or the D-9 as well? regards, Jack Edited September 17, 2013 by JackG Link to comment Share on other sites More sharing options...
tank152 Posted September 17, 2013 Share Posted September 17, 2013 (edited) Hi Jack, again taken from Vol 2 of the Eagle-Editions book, Fw190 D-9 VS 111, solid propeller hub, part No 9-27011 A-4 . Fw190 D-11 VS 9, hollow propeller hub, part No 9-27012, A-2 this blade had a clipped tip. Fw190 D-13 VS 9, hollow propeller hub, part No 9-27012 C-1. The VS designation refers to the complete propeller type including the hub, the part No just the blade. VDM refers to the place where the propellers were manufactured, VDM Luftfahrtwerke AG. The blades were supplied by Gustav Schwarz K.-G. propellerwerk, Berlin. Also VDM were a main sub contractor for landing gear wheels. The propellers were balanced at the factory and pre-painted in RLM70 and accompanied with strict instructions for the mandatory sequence for installation other wise the propeller would be out of balance. Tim. Edited September 17, 2013 by tank152 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now