5 bladed Rotol prop

Spit mark 24 5 bladed Rotol props were definatly lamminated wood, but I would take mark 12s comments into consideration, How much can you afford to lose?

Like what Mark12 said: a trade name for “…wooden multi laminations scarfed together, all bonded in resin adhesives and heat cured under controlled compression.”

Like this ?

Like what Mark12 said: a trade name for “…wooden multi laminations scarfed together, all bonded in resin adhesives and heat cured under controlled compression.”

Hello
What is “Hydulignum” :confused:

Winners and losers.

I had a disagreement with my boss about the composition of dowty Rotol 5 bladed prop blades,I said they were wooden and he said “no way possible” then he said”how much do you want to bet?”and I said”how much do you want to lose?”needless to say,I am expecting payment any day now…….Tim

Careful now!

Spitfire you win. Seafury you lose. 🙂

Mark

Thanks to all who answered

I had a disagreement with my boss about the composition of dowty Rotol 5 bladed prop blades,I said they were wooden and he said “no way possible” then he said”how much do you want to bet?”and I said”how much do you want to lose?”needless to say,I am expecting payment any day now…….Tim

Jablo

Weren’t Jablo blades used often. And weren’t they a composite material? Seems like Spits used lots of Jablo blades

Dan

Dan,

In Spitfire terms we should read ‘Jablo’ for one of the wooden types of blade produced by Dowty-Rotol. Others were Spruce and Hydulignum.

These blades were never just cut cut from a single ‘block’ of wood. The manufacturing process utilised wooden multi laminations scarfed together, all bonded in resin adhesives and heat cured under controlled compression.

Mark

Weren’t Jablo blades used often. And weren’t they a composite material? Seems like Spits used lots of Jablo blades

Dan

According to the SeaFury Propeller Equipment Overhaul Manual from Dowty Rotol that I have laying on my desk, the blades are machined from an aluminum alloy forging.

Rotol prop blades were made of compressed wood until the end of the war when they changed to Dural.

DH made hollow steel blades postwar for the big airliner props but AFAIK Rotol never did. It was agreed Rotol would only make props up to and including Dart size and DH would make the bigger ones.

Dural (Aluminium)

My bet would be hollow steel, but I am sure there is someone here who really knows!

Hello again to all,
I need help in resolving a dispute.Were the blades of the 5-bladed Rotol prop,such as used on the Sea Fury made of wood or of steel?need to know ,thanks for any help. Tim. 😮

Neither