bones
Gold Member
- Joined
- Jul 28, 2004
- Messages
- 1,278
- Location
- Chtrs Twrs Australia
- Aircraft
- a/c
- Total Flight Time
- cant remember, didnt have log books before, but since over 3000
Ok smart people, need some help here how would one work out how heavy of a propeller can i swing on a 914, reading out of the manual(cant believe i looked at it) it says the following;
Momentent of inertia for propeller;;; 6000 kgcm2, that is of course SQUARED.
So if i am using a 70in prop, how much weight can i swing around with out damaging anything?
The reason i ask is because i am trying a neat little trick for prerotator, only thing is i had to use a steel pulley on prop hub, and its damn heavy, took it back to the shop to put it on a diet, but i was wondering how do i work this out?
70in is 178cm
No idea if i am even starting this right.
What i did was 89x 3.1412= 280cm2, then divided that by 6000
I worked out to be about 46kg, but dont know if im right or not??????
Momentent of inertia for propeller;;; 6000 kgcm2, that is of course SQUARED.
So if i am using a 70in prop, how much weight can i swing around with out damaging anything?
The reason i ask is because i am trying a neat little trick for prerotator, only thing is i had to use a steel pulley on prop hub, and its damn heavy, took it back to the shop to put it on a diet, but i was wondering how do i work this out?
70in is 178cm
No idea if i am even starting this right.
What i did was 89x 3.1412= 280cm2, then divided that by 6000
I worked out to be about 46kg, but dont know if im right or not??????
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