So Ed, are you saying that us Typhoon/Beau people are basically hooped? We now need to source the roll forging forms and the hammer forging forms before we can progress far with getting Alloy blades?

Might be back to thinking about composite blades then, although I have reservations about harmonics.

On the plus side, I just scored (purchased) T.O 03-20CC-4, otherwise known as AP2121A&B, which is the Hamilton Standard interchangeability manual. I’ll post in the props thread. Nothing about blades in it and nothing about DH part numbers, but the 23EX is in there for you so it might be helpful for you Mossie/Lanc people, but maybe not so much help for us Typhoon/Halifax/Beaufighter people with the No 6 Hub Spline.

Cheers
Graham

We have a spider to work with. Is it a good spider, only time and inspection will tell! Interesting picture of the Beau prop. It is identical to the Typhoon except for the blades and the pitch stops inside. I don’t care if it is a feathering prop or not, put the Typhoon pitch stop rings in and it won’t feather anymore 🙂

I’m pushing Hamilton Standard to honour their Type Cert for the 23E prop (Type Cert P-603 Rev 16) as it clearly states on there that LH Props are certified. As the Type Cert holder, they are supposed to maintain ALL part numbers listed on the Type Cert.

Of course, if they wanted to give me all the LH prop tooling I would be Ok with that too 😉

For hubs, I would imagine that it is possible to machine a 23E50 (or 23EX) into a 23E60. Just a bigger hole heading to the engine.

While we’re talking HS and DH props, didn’t you lovely people in Oz make a conversion chart for your Beau’s (fighter and fort) so that you could mix and match props to suite what you had in stock at the time? Anybody know if such a document is in existence?? I would dearly love to get my hands on it if it is.

So just to reiterate, blades are the issue. As far as I know, we have everything else. And we even have access to a good blade, but that doesn’t mean we can easily get more made!

Cheers
Graham

Beermat, Yes, I’m dragging this thread up again 🙂

With regard to your post on 4 April 2015, of how DH blade numbers work, would it be safe to assume the following for a DP4551157 blade.

45 means Metal Hydromatic.
5 means 5000 Series (although data I have says it is 5500 Series).
11 is a Drawing Number fo rthe blade?
5 means LHT configuration
7 means that 7 inches have been removed from the design diameter of the prop, as this prop is 14ft, the design diameter would be 14″7 in standard form?

Now to try and convert that to Ham Standard!

Cheers
Graham