DKNguyen
04-30-2008, 01:18 PM
Hi, everybody. My interest is with helis is mainly to have some mobile platform to build electronics for (I'm an EE) like autopilots, motor drives, radios etc. So I'm learning on the sim right now and have decided on a setup but wanted your opinions on it if any.
-Mini-Joker
-CC Phoenix HV-85 (is this big enough?)
-Hyperion Z4045-14 Outrunner (is this big enough? too big? I don't think it was designed for helis, but it seems to have cooling fans. I didn't know how much power:weight a heli needs so I assumed a conservative 150W per pound...this is conservative right? I'm guessing the weight of the thing is going to be 4.5 kg = 10lbs. THis is with the extra 1kg battery which is coming up later int he post that I am not sure if I need. Or would something like a Scorption HK 30 where 100W/lbs is right near the top if it's continuous power range good enough?)
-JR9303 2.4GHz + JR9001 Powersafe Receiver
-Hitec 7955TG Cyclic Servos (x3)
-Hitec 7955HB RUdder Servo (Are these servos okay? I kind of wanted titanium gears so they don't strip in flight in a hard maneover and crash, but I don't think the tail carries too much load and speed is more important there. I don't plan to fly 3D, but sometimes it
seems I need to do a hard manuever to power out of a bad situtation)
-2300mAh 12-14 cell A123 pack (This pack is already 990g-1.1kg and weighs but I think A123s can provide more of their rated capacity under load compared to Lipos so it works out to be fairly equivelant?)
I haven't decided on a gyro yet since I might build one myself as part of an autopilot and use that.
What is the current draw for something like a Mini-Joker? If it's 40A then with the pack I'm thinking about it works out to be 3 minutes of flight time which isn't too much. BUt the pack is pretty heavy already, though I could double them up if I wanted to I suppose. 2kg worth of batteries is pretty heavy though on a craft that has a regular all up weight of 2.7kg. I think that's 1kg extra of batteries if I double them up.
Thanks!
-Mini-Joker
-CC Phoenix HV-85 (is this big enough?)
-Hyperion Z4045-14 Outrunner (is this big enough? too big? I don't think it was designed for helis, but it seems to have cooling fans. I didn't know how much power:weight a heli needs so I assumed a conservative 150W per pound...this is conservative right? I'm guessing the weight of the thing is going to be 4.5 kg = 10lbs. THis is with the extra 1kg battery which is coming up later int he post that I am not sure if I need. Or would something like a Scorption HK 30 where 100W/lbs is right near the top if it's continuous power range good enough?)
-JR9303 2.4GHz + JR9001 Powersafe Receiver
-Hitec 7955TG Cyclic Servos (x3)
-Hitec 7955HB RUdder Servo (Are these servos okay? I kind of wanted titanium gears so they don't strip in flight in a hard maneover and crash, but I don't think the tail carries too much load and speed is more important there. I don't plan to fly 3D, but sometimes it
seems I need to do a hard manuever to power out of a bad situtation)
-2300mAh 12-14 cell A123 pack (This pack is already 990g-1.1kg and weighs but I think A123s can provide more of their rated capacity under load compared to Lipos so it works out to be fairly equivelant?)
I haven't decided on a gyro yet since I might build one myself as part of an autopilot and use that.
What is the current draw for something like a Mini-Joker? If it's 40A then with the pack I'm thinking about it works out to be 3 minutes of flight time which isn't too much. BUt the pack is pretty heavy already, though I could double them up if I wanted to I suppose. 2kg worth of batteries is pretty heavy though on a craft that has a regular all up weight of 2.7kg. I think that's 1kg extra of batteries if I double them up.
Thanks!