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Archive for October, 2019
Posted by VicT | Oct 15, 2019 @ 06:23 AM | 2,040 Views
The stock landing gear is good for rough ground or sand/snow/mud as the large tires provide added floatation and little rolling resistance. Once in the air though the large frontal area provide drag. The wire gear sags and gives negative camber when on the ground. You can bend the axles down for positive camber but now she looks like Cessna Birdog! because the axles are approximately .75 inches aft of the leading edge the tail wheel has less weight compared to axles that are in front of the leading edge. This and rolling resistance can cause nose overs while landing and decelerating on certain surface conditions. Prop strikes and fin damage can result that might end further flying for the day. Here is an alternative landing gear system that reduces the above negative aspects. Like any modification be careful and responsible when operating and proceed at your own risk.

I chose the #132 Robart Scale Diamond Tread 2.75 inch tires because of their low bounce properties and looks. The landing gear is the Dubro Super Strength .35-.61 size. Dubro Axle Shafts 5/32 are bolted to the injected molded gear after drilling out a 5/16 inch hole. There is a pilot dimple on the gear but there is room for a different hole for a slightly lower axle location.

The Maule has sufficient foam in front of the stock plastic landing gear parts. Plywood that is 1/4 inch thick by 3 5/8 wide by 2 inch long is used with 3/32 inch thick plywood longerons to carry the stresses to...Continue Reading
Posted by VicT | Oct 11, 2019 @ 02:11 PM | 1,930 Views
When I first got my Timber I liked the articulated/hinged main landing gear with springs. I thought it would hold up to true dropped in hard landings and it did for about 20 landings. Then problems started to show up. Spring stretch, then spring limiter failure then splitting of the seam where the plastic landing gear mounts are located.

I called Horizon fixed wing technical and they gave me free landing gear and springs (when they were in stock). I installed the new parts and the same problems would re occur. This did not happen at the 2 clubs that I belong to that have hard runways. However I quickly learned that the Timber is a great trainer if the student and instructor can avoid nose overs and prop strikes. (Ive been flying RC since 1965 and RC instructing since 1996 when I retired as a military C-130 instructor pilot)

I changed my landing style from STOL type touchdowns to conventional round out/flare type touchdowns and this helped but when landing in grass the added drag on the big wheels caused momentum problems where the Timber would nose over and the windmilling prop would strike the grass/ground. This did not help beginners learning the Timber and I ended up fixing many Timber landing gear problems until I switched to the Valiant 1.3 landing gear. It changed the looks but kept the Timber operational much longer than the stock articulated gear design. Here is how I tried to fix the articulated design problems.

I wanted to fix the design problem of the...Continue Reading
Posted by VicT | Oct 05, 2019 @ 10:09 PM | 1,644 Views
Ive set up two brand new Maules in the last 2 was. My Maule on wheeled floats is still holding up despite a potential mishap.... more on this later.

Dennis had been flying his Maule since it was released but lost sight of her and it got lost in the Florida swamps. He switched to the Valiant for 6 months but decided he liked the Maule for its rugged construction.

I offered to program his new Maule. It has the same Jan 2018 Manual but he had to pay an extra 18% tariff because of the sanctions against China. The servo plugs are now labeled on the black plastic so. No sticky paper labels to fall off. I had to pull the aileron, flap, and light plugs out of the fuselage with a small hook. They really jam them in. Too bad they cant make a modular connector like on the Commander, and EC1500. Once you make it he connections and use the 4 wing bolts and 2 strut bolts the tendency is to keep it a one piece model. I made up a handle from .046 inch KS music wire and before the final bend used coffee stirrer tubes to position a hook for ceiling mounting at home or in the vehicle. I used credit cards CAd to the fuselage to keep them secured.

Dennis still had his program in his DX8 Gen 2 TX but to initially program SAFE I used a new model and made sure that the gear channel 5 would be operated by assigning switch B. I used an aileron extension ( actually I used the included float Y cable to extend the bind connector to the outside of the fuselage. After...Continue Reading
Posted by VicT | Oct 05, 2019 @ 12:19 AM | 1,345 Views
Dropping parachutes and other things from the cargo bay can get caught up and snagged with the drop linkage. Covering the drop linkage can minimize hung loads. Here is one way to cover the linkage.

Remove the wings, stab and fin. Place the fuselage on your lap or in a foam cradle. The drop linkage extends out towards the center of the cargo bay and can be moved closer to the fuselage wall. To do this first power up the fuselage and extend the ramp fully open and remove the bolt and nut from the ball link on the ramp/door. A small pair of forceps can be clamped on to the nut while a long Phillips head screwdriver unscrews the bolt.

With the ramp/door disconnected insert a small box cutter between the servo sides and the foam. This will cut the bond between the glue and foam bond. Be careful not to cut the servo wires. Now move the servo fore and aft with your fingers to further loosen the glue/foam bond. Do this until you can pull the servo out and away from the foam cavity. Do not use plyers or Vise Grips as you can squeeze the servo and damage the internal gears.

With the servo removed use a small box cutter to remove the foam servo support structure. With the structure removed use a Dremmel tool to grind away a deeper servo pocket. Be careful not to break thru the fuselage wall. Test fit the servo into the deeper foam pocket. When satisfied glue the servo into the pocket. I used regular Gorilla Glue on the sides and bottom of the...Continue Reading