Scratchbuilt and Power (Input Watts vs Thrust)
11-21-2008, 09:48 PM
#1
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Location: Naples. Florida
Posts: 362
Scratchbuilt and Power (Input Watts vs Thrust)
Hi All..
I am learning about how input watts per pound work.
50–70 watts per pound: Minimum level of power for decent performance, good for lightly loaded slow fl yer and park fl yer models
I am learning about how input watts per pound work.
50–70 watts per pound: Minimum level of power for decent performance, good for lightly loaded slow fl yer and park fl yer models
• 70–90 watts per pound: Trainer and slow fl ying scale models • 90–110 watts per pound: Sport aerobatic and fast fl ying scale models
• 110–130 watts per pound: Advanced aerobatic and high speed models
• 130–150 watts per pound; Lightly loaded 3D models and ducted fans
• 150–200+ watts per pound: Unlimited performance aerobatic and 3D models
-------------------
IS there a chart to gives us a similar comparison based on THRUST to WEIGHT ratios ?
Thanks In Advance
Dave in Naples
• 110–130 watts per pound: Advanced aerobatic and high speed models
• 130–150 watts per pound; Lightly loaded 3D models and ducted fans
• 150–200+ watts per pound: Unlimited performance aerobatic and 3D models
-------------------
IS there a chart to gives us a similar comparison based on THRUST to WEIGHT ratios ?
Thanks In Advance
Dave in Naples
11-21-2008, 09:53 PM
#2
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Join Date: Jul 2007
Location: Naples. Florida
Posts: 362
...minutes later .. I think I found some info..
• 3-D Aerobatic Airplanes – doing a lot of hovering – the thrust should be about 150% of the take off gross weight. For example, if the gross weight of the plane is 10 oz, you need about 15 oz of thrust to ensure optimum performance.
• High Performance Aerobatic Airplanes – the thrust can be between 75% and 100% of the take off gross weight. For example, if the gross weight of the plane is 10 oz, your thrust needs range between 7.5oz and 10 oz. You have plenty of room to tailor your thrust weight ratio. Use higher thrust for performance and lower thrust for duration.
• Sport Airplanes – 50% thrust to weight ratio will give you good flight performance and duration.
-------------
But any other chart would be appreciated. Thanks
• 3-D Aerobatic Airplanes – doing a lot of hovering – the thrust should be about 150% of the take off gross weight. For example, if the gross weight of the plane is 10 oz, you need about 15 oz of thrust to ensure optimum performance.
• High Performance Aerobatic Airplanes – the thrust can be between 75% and 100% of the take off gross weight. For example, if the gross weight of the plane is 10 oz, your thrust needs range between 7.5oz and 10 oz. You have plenty of room to tailor your thrust weight ratio. Use higher thrust for performance and lower thrust for duration.
• Sport Airplanes – 50% thrust to weight ratio will give you good flight performance and duration.
-------------
But any other chart would be appreciated. Thanks
07-12-2009, 08:52 PM
#3
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Join Date: Dec 2008
Location: Athens, Greece
Posts: 5
Originally Posted by dmarko
• 50–70 watts per pound: Minimum level of power for decent performance, good for lightly loaded slow fl yer and park fl yer models
• 70–90 watts per pound: Trainer and slow flying scale models
• 90–110 watts per pound: Sport aerobatic and fast flying scale models
• 110–130 watts per pound: Advanced aerobatic and high speed models
• 130–150 watts per pound: Lightly loaded 3D models and ducted fans
• 150–200+ watts per pound: Unlimited performance aerobatic and 3D models
• 90–110 watts per pound: Sport aerobatic and fast flying scale models
• 110–130 watts per pound: Advanced aerobatic and high speed models
• 130–150 watts per pound: Lightly loaded 3D models and ducted fans
• 150–200+ watts per pound: Unlimited performance aerobatic and 3D models
And for all us "metric" people:
Pound (lb) ~ 0,5kg
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