What size engine?----Servo size--Wife say's no
07-19-2002, 05:18 AM
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What size engine?----Servo size--Wife say's no
I'm building three cropduster type aircraft. All will dust or spray, but the one i'm concerned about is the 1/4 scale AG-WAGON, THAT WILL HOLD UP TO 31/2 GALLON'S of colored water. Empty weight 28# a 10' 8'' wingspan. i've have FOUR engines to pick from---A SACH'S 5.8------QUADRA 75----BRISON 4.2 TWIN AND A BRISON 6.4 Twin. My takeoff weight could possibly be 48 to 58#. NOW I'M NOT GOING TO BE DOING NOTHING FANCY, SIMPLY FLYING SCALE and of course with flaps down, probably 15 degrees. My servo selection, Airerons 2 futaba 9201 69.7 oz in- at 4.8 volts one for each---rudder and elevator 1 on each futaba 9201 mounted in the back---- FLAP'S Futaba 1 ea. S3302 with metal gear's-----throttle & switch for 12 volt rv pump will be futaba 148. Is this a gray area. I plan on going to a 6 volt system, how much more torque will i get? And the last and most important question, MY WIFE a freshman high-school sweet heart say's no water and is a little hot over it, Should i spray and cool her off?
07-20-2002, 10:23 AM
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What size engine?----Servo size--Wife say's no
I think he wants to know if he can take off with some twenty pounds of colored water ?????
I just love R/C
I just love R/C
07-21-2002, 06:44 PM
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What size engine?----Servo size--Wife say's no
Ok,, Had damn well better listen to Carlos... 'Cause we -ALL-
know what happens when Murphy's Laws are enacted...
Robby <srry, Carlos,, I just couldn't resist>
know what happens when Murphy's Laws are enacted...
Robby <srry, Carlos,, I just couldn't resist>
07-21-2002, 07:26 PM
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What size engine?----Servo size--Wife say's no
At about 10 lbs a gallon, 3.5 gallons is 35lbs. With another 28lbs in plane and another 1.5lbs in gas (32oz tank) you gross weight could approach 65lbs. I would check your wing loading and if you are under 50oz/sqft then you should be able to take off but not do much until you dump that water. I would have a backup control because I would not want to land with that much weight!
