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WORKING SHOCK ABSORBERS
Lets get to it.
The plans for the fuselage and wing come from rcfbaircraft.com . They were 2 dollars and were quite comprehensive. While numerous changes were made, the plans were invaluable to the final form.
Wingspan 55"
RTF weight 850grams
Motor 1900kv
ESC 12a
I began with the rudder. I stripped the paper from the foamboard and laminated two pieces together. To achieve the balanced rudder effect, i cut a rudder blank from the plans into segments to allow the placement of plywood hinge points. Not shown in this image is an extremely thin pine spar on one side of the stab.
The wing sections are of a familiar foamboard design, with two plywood spars. In retrospect the spars recommended by the plans are extremely weighty. Almost 80 grams, and not oriented properly. I would recommend your own spar design. Joining the spars was also very difficult, and i will admit to using a lot of expanding glue in the joint area. You can see the addition of some wide foam ribs. these were initially intended to provide support for the gear and engine nacelles, but was not necessary. I would use depron or balsa ribs.
You can see that the folded board wing makes a split flap quite easy to place. This is a balsa flap that was not used.
I wanted the flaps to be extremely tight in tolerance because i am using one servo. They are accomplished with pieces of sequential diameter aluminum. Once placed, a pin and hinge is used to join the center flap to the angled flaps on the outboard panels. Examine the different angles that the pin must point to prevent binding, glue it into place somewhere between these two values. At only 18 grams without servo, these flaps operate extremely smoothly.
Okay, that's all for today, next time, shock absorbing main gear, and shock absorbing tailwheel.
Lets get to it.
The plans for the fuselage and wing come from rcfbaircraft.com . They were 2 dollars and were quite comprehensive. While numerous changes were made, the plans were invaluable to the final form.
Wingspan 55"
RTF weight 850grams
Motor 1900kv
ESC 12a
I began with the rudder. I stripped the paper from the foamboard and laminated two pieces together. To achieve the balanced rudder effect, i cut a rudder blank from the plans into segments to allow the placement of plywood hinge points. Not shown in this image is an extremely thin pine spar on one side of the stab.
The wing sections are of a familiar foamboard design, with two plywood spars. In retrospect the spars recommended by the plans are extremely weighty. Almost 80 grams, and not oriented properly. I would recommend your own spar design. Joining the spars was also very difficult, and i will admit to using a lot of expanding glue in the joint area. You can see the addition of some wide foam ribs. these were initially intended to provide support for the gear and engine nacelles, but was not necessary. I would use depron or balsa ribs.
You can see that the folded board wing makes a split flap quite easy to place. This is a balsa flap that was not used.
I wanted the flaps to be extremely tight in tolerance because i am using one servo. They are accomplished with pieces of sequential diameter aluminum. Once placed, a pin and hinge is used to join the center flap to the angled flaps on the outboard panels. Examine the different angles that the pin must point to prevent binding, glue it into place somewhere between these two values. At only 18 grams without servo, these flaps operate extremely smoothly.
Okay, that's all for today, next time, shock absorbing main gear, and shock absorbing tailwheel.
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