FlyinTiger
Posts: 642
Joined: 1/26/2004 From: Penn Valley,
CA, USA Status: offline
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After taking the cowling off and going over every bolt and nut on the plane, here's the issues I've found after approximately 50 flights - most about ten minutes each, and five gallons of fuel...four Lawnboy Ashless and one Amsoil 100:1 premix. Issue #1. Cowl is rubbing through the covering that is under it around the front of the plane. Temp fix: I am attempting a temporary fix by putting some tape over these contact points so it doesn't continue to wear, I'll be looking for a more permenant solution. Issue #2. Hatch dowel pins wearing against holes in bulkhead, the hatch was getting sloppy and vibrating. Temp fix: Wrapping tape around the dowls that are worn down fills the gap where the wood was wearing out. After a few flights it appears to be holding up. I tried putting glue around the dowels, but it just cracked and broke off. I may consider putting in two additional hold-down screws on each side near the front, that should make it solid. Issue #3. The port side wheel pant started splitting down the center. I originally didn't glass the center because there is a large glue bead down the middle which seemed to be in the way. Permenant fix: I went ahead and glued the wheel pant back together, then glassed both halves together using 1-1/2" wide strips of fiberglass so I could just go right over the bead. We'll see how those hold up. Issue #4. A 3W fuel dot didn't work out so well...it was very hard to mount high enough on the fuselage so I could fill the tank and not have fuel siphoning out afterwards. Permenant fix: I switched to a B&B Specialties fuel dot, and it came as a set of two, so I have a fuel filler and a nice vent exit that I can plug when the plane is inside. I always leave the vent plug out when the plane is outside as varying temperatures can cause expansion or contraction of the air/fuel mixture inside the fuel system and blow a fuel tank in extreme cases. Things that work great: Red RTV around the exhaust bolts and where the muffler attaches has held up wonderfully and not leaked at all. Dual 2350mah Li-Ion batteries on the RX and one of the same mah on the ignition allows me to fly MORE THAN nine (9) flights before I get down to the 7.0 volt cut-off under a one amp load. I just have to charge after that, because it just seems wrong to fly for three weekends without charging. DS 8611 servos on all control surfaces is proving to be a great choice because I am getting zero blow-back on my surfaces, I get quick deflections for solid and positive control, and they center perfectly...I haven't changed my trims since the original surface set-up. Aircraft structural integrity seems to be sound. All glue joints that I can see are still solid as can be, nothing is coming loose or separating. Using Ultracote to attach my canopy is proving to be a good choice. It is smooth, easy, good looking, and I didn't have to put screw holes and reinforcements in the hatch to make it work properly.
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FlyinTiger
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