Originally posted by Ah's Availble
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There's a huge amount of discussion about this plane's "problems" here on the Squawk - and you'll also find some strong opinions with differing points of view. I agree with much of what XViper said but I'll give you another opinion.
(and - look through the older comments here, starting back when we first started flying it and posted "first impressions" - around the page count of 20 or so.)
This model is definitely heavy when set up "stock" with a 4000mah battery and those tail weights. You can improve it... remove the weights and use a smaller battery and you can lower the overall weight a few ounces. Hauling extra weight certainly doesn't ever help our models, and especially with a plane that had the nickname "the Baltimore *****" due to its lack of support (small wings for a bomber). With a lighter plane, the motors don't need to work as hard and you'll still get good flight times. I use a 3600 and I get 8-minute flights with plenty to spare. I can go up to 12 minutes.
Most of us agreed that the model needs "up" trim. You can fly it with the elevators up, but it can be permanently fixed by shimming the entire TE of the stab up a few mm. (there was a huge argument here about whether that was necessary). BUT...the model is VERY sensitive to elevator and you definitely need to cut down the amount of elevator throw. I nearly crashed mine on the maiden flight when I snap-rolled it just by pulling back on the stick in the first turn. After the mod and with small elevator throws, mine flies perfectly fine at lower throttle settings. I never have any problem with stalling unless I really force it, on purpose.
For me, the thing that made the most difference was cutting back the elevator throw, and always using takeoff flaps and landing (full) flaps, because flaps will help the plane avoid a stall at lower speeds. They work great.
Here's a quick video I made early on (Oct 2017~) to illustrate the elevator throw and also how it takes off and lands from grass without any problem. (I replaced the stock wheels with thinner ones, and a slightly larger nose wheel - see the pic)
As for your roll, not sure. Maybe one of the nacelles is crooked? One might not be glued on correctly. Some Dynam planes have poor assembly that the modeler needs to correct. (for example, some of us discovered the flap horns weren't glued on.) I corrected a number of problems with mine, but the nacelles were straight. Others here have reported differently! Once you fix these things, Dynam planes are great - I enjoy my B26 and P61 a lot.
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