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Old 02-14-2003 | 12:31 PM
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VoughtF4U
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From: Gray, TN
Default .91 4-stroke performance

Terry,

Just to let you know, my first Sig Pig was built completely stock with no deviations from the plans. I put a Magnum .91 4 stroke on it with a 16oz tank. I used a master airscrew 14x6 4-stroke prop. I used standard servos on the throttle and ailerons and some FMA metal gear 77oz servos on the rudder and elevators. Once the engine was broken in I could jam on the throttle from a dead stand still, go straight ahead about 15 feet and yank it off the ground to a straight vertical climb. I would then pull the throttle back and let it settle into a hover at about 20 feet. No problems with control or hovering. I would only have a little extra throttle left over to pull it out of the hover, but it would still accerlerate straight up.

Second one I built, I highly modified it. I moved the gear an inch forward, moved the firewall back an inch, and cut lightening holes in the ply sides. I left the rudder and elevator basically as they come in the kit without cutting them down to shape and added a taller turtle deck and coke bottle canopy making it into a poor man Ultimate. I also left off the rounded wingtips which made the roll rate faster. This one I powered with a Magnum 1.08 2-stroke. This one would hover easier and had more power out of the hover. It elevator's like you wouldn't believe and would do some incredible harrier passes.

The only problems I ever had with them were these: Some of my CA hinges would fail after many flights. This was a combination of not getting all the hinges lined up perfectly, the extreme throws i was forcing on them, and just the sheer number of flights i would put on them. The only other problem I had was on one of them I had the elevator pushrod fail, my fault though. I didn't get a good solder joint on the clevis at the elevator. On the maiden flight she flew perfectly, came in to land it and decided it flew so good I would make it a touch and go and come around one more time and land. Well, on the downwind pass after the touch and go it just slowly nosed over and went straight in. Solder joint failed.

Stock or modified you can't go wrong. I liked the second one for banging the sticks around and the first one for barnstorming. My next one will be another stock plane, might try the Saito 100. Once again, good luck with yours.