Helicopter HP/kg: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| (2 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
*10 lb per hp - this specifies 130 HP for 1300 lb weight [https://shop.robinsonheli.com/r22-beta-ii-helicopter/]. 260 lb engine [https://www.google.com/search?q=Lycoming+O-360+weight&oq=Lycoming+O-360+weight&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCDI5OTRqMGo0qAICsAIB&sourceid=chrome-mobile&ie=UTF-8] 1300 lb total weight. | *10 lb per hp - this specifies 130 HP for 1300 lb weight [https://shop.robinsonheli.com/r22-beta-ii-helicopter/]. 260 lb engine [https://www.google.com/search?q=Lycoming+O-360+weight&oq=Lycoming+O-360+weight&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCDI5OTRqMGo0qAICsAIB&sourceid=chrome-mobile&ie=UTF-8] 1300 lb total weight. | ||
*7 lb/HP - [https://en.m.wikipedia.org/wiki/Sikorsky_S-76] | *7 lb/HP - [https://en.m.wikipedia.org/wiki/Sikorsky_S-76] | ||
*5 lb/HP for heavy cargo of 10 tons [https://en.m.wikipedia.org/wiki/Sikorsky_CH-54_Tarhe]. 2000 lb engine weight to 50000 lb gross [https://en.m.wikipedia.org/wiki/Pratt_%26_Whitney_T73] - engine weight to lift power is more favorable. | *5 lb/HP for heavy cargo of 10 tons [https://en.m.wikipedia.org/wiki/Sikorsky_CH-54_Tarhe]. 2000 lb engine weight to 50000 lb gross [https://en.m.wikipedia.org/wiki/Pratt_%26_Whitney_T73] - engine weight to lift power is more favorable | ||
**Hp is astronomical (10000 HP) but weight is tiny (2000 lb) | |||
*It seems that | *Motor weight to lift is 1:5 for light copter, and 1:25 for heavy cargo copters. HP to lift is 1:10 in the small copter, but 1:5 in the large - this is likely a function of aerodynamics of blades. Air is only so light, and can provide only so much lift. | ||
**It seems that multiple small blades are more effective at lift generation. | |||
**Seems a gasoline electric hybrid would provide the most lift per engine/'battery'=fuel weight | |||
Latest revision as of 23:03, 2 June 2024
- 10 lb per hp - this specifies 130 HP for 1300 lb weight [1]. 260 lb engine [2] 1300 lb total weight.
- 7 lb/HP - [3]
- 5 lb/HP for heavy cargo of 10 tons [4]. 2000 lb engine weight to 50000 lb gross [5] - engine weight to lift power is more favorable
- Hp is astronomical (10000 HP) but weight is tiny (2000 lb)
- Motor weight to lift is 1:5 for light copter, and 1:25 for heavy cargo copters. HP to lift is 1:10 in the small copter, but 1:5 in the large - this is likely a function of aerodynamics of blades. Air is only so light, and can provide only so much lift.
- It seems that multiple small blades are more effective at lift generation.
- Seems a gasoline electric hybrid would provide the most lift per engine/'battery'=fuel weight