Bigfoot Flap Servos
NOTE: It may be tempting to use a cheap servo for the flaps on Bigfoot. Donít do it. We use a hi-torque metal gear servo (our favorite is the Hitec HS-7954SH) to actuate the flaps, because the flaps are large and they take direct and intense prop blast every time you hit the throttle.
Flying the Bigfoot
Bigfoot is different! If you have been flying our 3D planes for a while, you are used to the feel of them and you have developed reactions for flying them. Before you fly the Bigfoot, realize that it is a different animal.
On one of our 3D planes, for example, you can simply power out of a spin.
The Bigfoot spins like a full-scale plane, and so you need to neutralize the controls and give it a little extra time to recover, just like a full scale aircraft or most RC scale aircraft.
The Bigfoot has an extremely wide speed range, from fast to extremely slow (about 3 mph), but you need to have the flaps extended at least 45 degrees to fly slowly and the aircraft will fly much slower with the flaps at 80 degrees than at 45. For this reason, we recommend approaching the Bigfoot in this manner:
Set the flaps up on a 3 position switch at first, with the positions as 0 degrees (full up or no flaps), 40 degrees (half flaps), and 80-85 degrees (full flaps).
Fly your first flight with no flaps and keep the speed up. Fly it like you would any sport plane. Once you have done this, gain a lot of altitude on the next flight and extend the flaps 40 degrees. You will see the nose pitch up. Take note of how much down elevator pressure it requires for level flight. Retract flaps. Land as before. Program in this same amount of elevator as your elevator-to-flaps compensation on your transmitter, so that you automatically have this amount of down elevator added when you drop flaps.
Fly again, gain altitude, and drop flaps 45 degrees and establish slow level flight. Drop flaps to 80 degrees. Full flaps are only for very slow flight. At full flaps, you will use throttle for your climb control, and you will not need to touch the elevator very much, just occasionally to keep the nose level. It is a different flight skill to fly this plane with full flaps, but once you master it, you will be able to fly extremely slowly at low altitude, turn very tightly, take off and land in little or no distance.
Practice using the flaps switch so that you become comfortable selecting UP, Half, and Full very easily without having to look at the transmitter. Once you do this, you can use the flaps for radical maneuvers. For instance, to perform a radical short distance bushplane takeoff, you drop FULL flaps, add full throttle so that Bigfoot leaps off of the ground, and once you have cleared the ground you select half flaps and fly away. If you canít operate the flaps switch easily, you canít fly this maneuver cleanly.
Firewall to front of cowl: 6 1/8"
Hacker A60-6XS on 6S 5000-5800 mAh battery, 20 x 10 prop
Hacker A60-5S with 8S 4000-5000 mAh, 20x10 prop
Electronic Speed Control:
Castle Creations Talon 90 ESC
Castle Creations Edge 100 ESC
Castle Creations Edge 130 ESC
Note: a generic fuel tank is included with the kit. We recommend a 8 or 16 oz. Fourtitude fuel tank, as these are easier to install.
Qty. 6 Hitec HS-985MG (Good)
Qty. 6 Hitec HS-5565MH (Better)
Qty. 6 Hitec HS-5585MH (Better)
Qty. 6 Hitec HS-7985MG (Better)
Qty. 6 Hitec HS-7955TG (Best)
Qty. 1 standard throttle servo if needed. NOTE: Mini-servos have a short life span as throttle servos in this application, use with caution.
Qty. 2 - 24" Elevator and Rudder
Qty. 2 - 12" Ailerons
Qty. 2 - 8" Flaps
Qty. 2 - 4-6" Ailerons (receiver side)
Qty. 2 - 4-6" Flaps (receiver side)
Qty. 1 - 18" Throttle servo
3.0"/ 76 mm
Download the 84" BigFoot Manual Here (Right-Click > 'Save As')