Recent content by shimmerz

Ive pretty much finished the assignment I had a few mistakes in my coding program when i last posted, Pretty much i designed my own propeller, had it spinning at 1150 RPM which keeps the tip around mach 0.8 and adds in compresibility factors. i can get the efficiency up to 86% for a slow...

ok.... ive been thinking though, ive been designing a constant speed propeller. that would make the gearing rather irrelevant, as a change in RPM of the engine will only change the blade/pitch angle of the propeller, and hence increase thrust via effective angle of attack of the propeller. lol...

cool, where did u get that from?

Sorry to bring this back up but i found i need some more information... Does anyone know what the gearing on the propeller was. I know the engine did up to 3000 RPM but if the propeller was rotating at the same speed it would go supersonic and will thus cause a large amount of problems...

hey thanks everyone, ive got enough information to finish the assignment. im going with a custom propeller due to the lack of like mathematical information regarding the variation of blade angle and chord length. the Merlin II data i already have is fine and i really dont need the Merlin III...

Thanks for that info.. I figured out how im getting around the propeller problem. all i now need is how big the hub was and i can start my analysis. looking that up now will probably find it shortly

That will be great. Ideally all i need is engine output in bhp and specific fuel consumption at sea level and 20000ft for different RPM. i do have this for the Merlin II but id like it if i could use a more advance model as it will make my report look better and my propeller wont have to be as...

also i checked that forum page u linked before, it was interesting but not what i required. Thanks though

Wow, thats great information. Im doing Aeronautical Engineering in and the assignment pretty much is to obtain thrust requirements for takeoff, climb and cruise and then pick an engine and propellor and prove that they could meet the required levels using different theoretical approaches. I...

Hi. I am currently doing an assignment on the Hawker Hurricane Mk 1 and am unable to find data on the propeller used. I am specifically after enough information to perform blade element analysis theory, which will require things such as the rate of twist of the blades, chord lengths...