Inter-Island Flight
02-21-2004, 10:31 PM
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Inter-Island Flight
Hi, not sure if this is the right forum, but our flying club is planning an R/C flight from Trinidad to Tobago sometime this year.....total distance would be about 40 miles. We would need about 45 minutes of flight time, and we'd be following it in a cessna....min. flying speed would be about 55 mph or so. 22 miles would be over water. We were thinking of using a model around a Y.S.120 4 stroke 'cause we have the engine already. We figure we'd need at least 120 ounces of fuel...and are thinking of using a modified arf....question is, which one? We were thinking of a cub at first, but realized it'd be too slow for the cessna. need something that would cruise at least 60 mph, have enough space for the 120-150 ounces of fuel, and would get off the ground with the fuel load. Another plane we were considering is one of the ugly stick types...any ideas???and if this is the wrong forum, could someone please suggest one?
Thanks,
Lee.
(Trinidad)
Thanks,
Lee.
(Trinidad)
02-21-2004, 11:22 PM
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RE: Inter-Island Flight
For payload... you want a Kadet Sr. That's the heavy lifter of ARF's able to carry double its own weight if you have a .61 in the nose.
Unfortunately... its cruise speed would be around 50 to 60 full loaded, and would go down as fuel burned.
Actually... you could get about the speed desired from any Cub. The models fly faster than you may think at low speed. (slower than you think at high speed)
For the heavy lifting of the fuel load... and to stay with the 1.20, you want an ARF that specifies .91 size 4-stroke in its upper to mid-range engine sizes. Then you want to use a medium to long prop, seeking the pull power rather tan the speed of a short high pitch prop.
Almost any appropriate size plane for the 1.20 will lift the load. They will carry a large amount if yo don't want to do any aerobatics, and you have adequate runway. Practice flying it with heavier loads by strapping on a soda bottle that can be dropped by servo controol (so you can always land with the aircraft at its lightest without having to fly for 2 hours to burn off fuel.)
Also... do some timing of fuel consumption with different loads. You may be suprized at the amount actually needed to complete the flight.
And... plan on unexpected headwinds making the flight take longer... good practice for point-point is to carry 20% more fuel than normal wind patterns say is needed.
Unfortunately... its cruise speed would be around 50 to 60 full loaded, and would go down as fuel burned.
Actually... you could get about the speed desired from any Cub. The models fly faster than you may think at low speed. (slower than you think at high speed)
For the heavy lifting of the fuel load... and to stay with the 1.20, you want an ARF that specifies .91 size 4-stroke in its upper to mid-range engine sizes. Then you want to use a medium to long prop, seeking the pull power rather tan the speed of a short high pitch prop.
Almost any appropriate size plane for the 1.20 will lift the load. They will carry a large amount if yo don't want to do any aerobatics, and you have adequate runway. Practice flying it with heavier loads by strapping on a soda bottle that can be dropped by servo controol (so you can always land with the aircraft at its lightest without having to fly for 2 hours to burn off fuel.)
Also... do some timing of fuel consumption with different loads. You may be suprized at the amount actually needed to complete the flight.
And... plan on unexpected headwinds making the flight take longer... good practice for point-point is to carry 20% more fuel than normal wind patterns say is needed.
