Official Dynam 1500mm B-26 Marauder Thread

[hellcat716]

Was so disappointed with the B-26 today when I opened the box I am going to return it tomorrow. Nothing packed right, top wing hatch was warped and magnets loose. Nothing taped down in the box. Hope Motion RC get's better quality control in the future. Could be a good model with a lot of work that I am not interested in doing.

[ruffneckx1]

TIGRB......your effort is OUTSTANDING. :Cool:

When you get a chance could you detail your gear door mod ??


Woody

[rifleman_btx]

Just for grins what way did it snap over?

[TiredIronGRB]

Just for grins what way did it snap over?

It drops to the left just a tad which I don't usually see on twins, quads.

[rifleman_btx]

Interesting, I'll have to check my throw rate again. But I don't remember it being much, but it was at least 5/8 inch.

[rifleman_btx]

I did have those anchors pull up on the left. So I still think I had a flaw in my fuselage. It flew perfect through 2 packs and the 3rd pack was the snap of death with nothing changed. I feel the weight in my plane broke free on impact with the ground

[TiredIronGRB]

Rifleman, check the clearance on the ailerons where they meet the flap...mine was rubbing some.

[rifleman_btx]

Copy that

[rifleman_btx]

Looked like a slight rub at high deflection. But higher than what I used in my flap settings. Otherwise it looks like it was ok

[xviper]

It drops to the left just a tad which I don't usually see on twins, quads.

I had the HobbyKing C-47 - another twin, 4 cell plane. It had a terrible tendency to drop a wing when stalling if airspeed wasn't kept up. Had to do very wide, fast, near flat turns. My old FMS B-25 Mitchell was similar. Fly it slowish only when going straight, not in a turn and don't climb too fast. I plan to fly this one fast until I am familiar with its stall characteristics up high.

[themudduck]

I had the HobbyKing C-47 - another twin, 4 cell plane. It had a terrible tendency to drop a wing when stalling if airspeed wasn't kept up. Had to do very wide, fast, near flat turns. My old FMS B-25 Mitchell was similar. Fly it slowish only when going straight, not in a turn and don't climb too fast. I plan to fly this one fast until I am familiar with its stall characteristics up high.

Hey guys,

I did some more flying this evening and went through several stall tests (up high). My elevator throw is 1/2" and it will still snap, if full elevator is applied at speed. When its allowed to slow down, it will snap to the left rather hard. But I found that if I had the flaps set down about 10 degrees, it didn't stall as suddenly and I could slow it down more. With full flaps, it is much harder to stall and will fly with full up elevator.

My conclusion is that its important to limit the elevator throw and in the clean configuration (flaps up), one needs to keep the speed up.

[rifleman_btx]

That's what I was doing, I was close to 300' up and it snapped then recovered then when I tried to level it off it snapped still in the dive. At that point all Hope was lost

[TiredIronGRB]

I had the HobbyKing C-47 - another twin, 4 cell plane. It had a terrible tendency to drop a wing when stalling if airspeed wasn't kept up. Had to do very wide, fast, near flat turns. My old FMS B-25 Mitchell was similar. Fly it slowish only when going straight, not in a turn and don't climb too fast. I plan to fly this one fast until I am familiar with its stall characteristics up high.

Exactly, I have two of the HK C-47s and they will tip stall in a heartbeat...the B-26 doesn't seem like it's near as bad but any plane with the narrow tipped wings should be flown flat as possible with some speed in the turns and a long runout on takeoff.

[themudduck]

Hey I also wanted to mention that after a 6-minute flight with my 4000mah pack, it was at 3.92 volts per cell. So I'm going to try the 3600 pack from my Tigercat next weekend and see if it makes a difference to the flying. Its likely that a little less weight should be helpful. And I'll probably still have more than 5 minutes of flying.

[TiredIronGRB]

My conclusion is that its important to limit the elevator throw and in the clean configuration (flaps up), one needs to keep the speed up.

I think this is sound advice.

[ryramZ]

Dynam Twin ESC Calibration

[dkalwishky]

Hmmm... Wonder if that didn't contribute to my crash.. I'll have to take it all apart anyway. I hate these kind of crashes where the cause is so well hidden

Interesting thought regarding the wing bolts and your crash. I have a Park Zone Corsair that was flying really nice and but on the last flight the plane was acting really weird in the roll and pitch axis. I got it down and found that one of the wing bolts was missing. I put a new bolt in and she's flying really well again.

All that to say you may be onto something.

[dkalwishky]

Dynam Twin ESC Calibration

What's you opinion on calibrating with the trim all the way down or do you do it at zero position?

[rifleman_btx]

Also found if I took the anchor points and glued them to the bottom of their slots it may make the top panel fit flush. The way they only glued them to the top the anchors lifted causing the wing to sit wrong. Gluing them down everything came out clean. Keep in mind post crash sooo yeah... Figured I would test the theory anyway. When my new parts come in those things are getting 15min epoxy before any load is put on them at all

[ryramZ]

What's you opinion on calibrating with the trim all the way down or do you do it at zero position?

My throttle trim is down. Depending on the plane when binding I have noticed that the esc won't arm because of the throttle trim. I have been binding and calibrating esc's with down throttle trim for awhile now.