I just finished my LT-40 kit. SIG's website suggests a flying weight of 5.5 to 6 lbs. Mine came in at 6.5 lbs with an OS 46 LA for power w/ MAwood prop. Only other replacements from OEMare Dubro plastic spinner and Sullivan Gold-n-rod (yellow/blue) pushrods for the elevator and rudder. I'm using a Spektrum 1500 mAh NiMH (3.7 oz)battery, AR6100 Rx, Hitec servos. Covering is Ultracote.

And, it's gonna get heavier because as it sits (only things to do are balance fore-n-aft and set the throws) it rests squarly on its butt! Too bad it's not a taildragger - thought about it but it's gonna do club training gigs.

In the upright pics the tail is supported by a foam-covered 4x4. Em, might make a good anchor ...

Comments?

<><><> Just tossed a bit of weight at the firewall to get it a bit nose-down with CGat center of the main spar - 14.5 oz. Hey, why not back it an even 1 lb.? Is this reasonable? Where did the build go the wrong way? The tank is as far foward as 1/2" foam between tank and firewall will permit. The battery / foam pack is hard up against the firewall. The servo tray is 1" behind former F-2 (instructions suggest 1 7/8" behind F-2). Titebond IIand CA was used with exception of firewall-to-fuse bond. The CA hinge lines (elev, rudd &aile) were all sealed with covering on both sides per RCKen's Pay It Forward LT-40 build thread. Lite ply was used to add pushrod supports in 2 rear formers. Yea, I did think that the balsa that SIGprovided for the tail (fin &stab) was rock hard (aka heavy) but thought that it was their "it's a trainer - need to be strong" approach.

Geez - 14.5 OZ? Where's the helium?