Official Dynam 1500mm B-26 Marauder Thread

[ryramZ]

Put some wbpu on to help my Callie graphics decals adhere. Flak Bait decals should be here tomorrow.

[fieldofdreamsflyer]

Put some wbpu on to help my Callie graphics decals adhere. Flak Bait decals should be here tomorrow.

What light kit did you put on it

[RCjetdude]

Put some wbpu on to help my Callie graphics decals adhere. Flak Bait decals should be here tomorrow.

Incredible job on the weathering Ryan. It looks fantastic!

[rifleman_btx]

I just went and checked my plane and I found no lead weight in mine. I haven't really started on the build yet I just checked out the electronics to ensure that they were working properly. Rifleman do you have a tachometer to check both props are tuning at the same RPM?

No, but it was flying level to where I could go hands off most of the time. But there were occasional occurrences where it would drop a wing, however I thought it was due to wind that was mostly calm with interment gust. This really has me stumped

[Boots Whirlygig]

Sorry to hear about yours going in rifleman. I noticed some posts here when the Dynam B-26 was announced, concerning warped wings on Dynam planes? Just a thought.

[rifleman_btx]

I'll have to take a close look at that as well

[ryramZ]

What light kit did you put on it

FMS Skytrainer 182 lights. Two sets for the landing lights.

[themudduck]

Unpacked mine today and as someone else already mentioned, that lead weight in the tail was just rattling around loose - probably what caused the rear guns to detach and rattle around, too. Anyway, I took that weight out. I'd rather move the battery back or use smaller batteries to make it balance. That top wing cap is really ill fitting. Don't know if I'm going to mess with it. Tried shaving a little off the rear lip but that didn't do a thing. It could be the magnets aren't embedded enough and that's what's holding the cap too high up. The front lip is easy. I'll Blenderm that in place.

I spent about two hours last night trying to see what needs to be adjusted to get the wing's top cap to fit properly. I had already fixed the magnets and that didn't do it. The problem is that the wing isn't sitting down in the saddle correctly. After taking the wing off I discovered that the mounting plates in the fuselage aren't very secure - when you tighten the bolts they just pull up - because the soft foam doesn't offer much strength.

This could be a major problem - if you tighten the bolts too much, the mounts could come loose and the entire wing could come off!

I'm confident that if the wing can be pulled firmly down all the way into the saddle, the top hatch will fit properly. In order to do that, I'll have to epoxy those mounting flanges into the fuselage.

[themudduck]

I spent about two hours last night trying to see what needs to be adjusted to get the wing's top cap to fit properly. I had already fixed the magnets and that didn't do it. The problem is that the wing isn't sitting down in the saddle correctly. After taking the wing off I discovered that the mounting plates in the fuselage aren't very secure - when you tighten the bolts they just pull up - because the soft foam doesn't offer much strength.

This could be a major problem - if you tighten the bolts too much, the mounts could come loose and the entire wing could come off.

I'm confident that if the wing can be pulled firmly down all the way into the saddle, the top hatch will fit properly. In order to do that, I'll have to epoxy those mounting flanges into the fuselage.

(edited) I had some videos of the mounts posted here but I deleted them 8/28 to free up some storage space.
I'm convinced that if these wing mounting points are not dealt with, the wing will separate from the plane during hard maneuvers.

[terrygrau]

Any thoughts on ESC cooling??

[yorkiepap]

As much as I wanted this plane for my 1st multi-engine, I'm gonna pass on it as it appears that a rush to get to market has caused the mfg'r. to cut too many corners with quality/inspection/packing. A shame since it is such a great plane to model. I suspect with the demand really high for the Black Widow, it will follow the same route....hurry up & cut corners. I'm not going to spend my $$$$ & have to do a major overhaul on all the components to get a satisfactory flying model. You fellows keep up the posting of issues to provide valuable data to those who have & hope to get this plane airworthy.

Denny

[xviper]

Here are two short videos I took, to show the "weak foam around the wing bolts" that I've discovered. (to download)
Unfortunately even a 10-sec video is too big to attach here.

https://www.dropbox.com/s/a87ema23dz5f0sg/vid%20%231.mp4?dl=0

https://www.dropbox.com/s/mxpzgdtwdv04loc/vid%20%232.mp4?dl=0

That's a bit alarming. I think I'm going to just glue the wing down with FoamTac as added insurance (once I confirm everything is working OK).

[themudduck]

Here's an update regarding the wing mounting issue I've commented on.

With the screw in place, I was able to pull out the plastic piece pretty easily - it wasn't glued in very well. I reinstalled it (I used Foam-Tac) by gluing it to the bottom surface instead of the top surface

Then I used some scrap foam to fill in the gap. This gives it a much firmer support.

The following pictures are in sequence... "before", "during" and "after"

[CFIT rob]

The lead was also loose in mine,curious as to the neccesity. Perhaps testing with smaller, lighter batteries. Alpha/Ryan any thought? Still havent assembled. Using china hobby line 4000 40c about 455g. My gut feeling is to velcro it back in place and fly with it. Might "slow down" the tail,fly more bomber like with extra mass that far back? Will be going over her top to bottom. In spite of the expected teething problems and dynam QC, i love the value and IT'S A MARAUDER.....i think the P61 will have similar "issues" and i cant wait to be the very first to hit the preorder button. Mine arrived in good shape,pack fairly well with brown paper,no damage other a few minor dings (like any foamy).

[xviper]

Here's an update regarding the wing mounting issue I've commented on.

With the screw in place, I was able to pull out the plastic piece pretty easily - it wasn't glued in very well. I reinstalled it (I used Foam-Tac) by gluing it to the bottom surface instead of the top surface

Then I used some scrap foam to fill in the gap. This gives it a much firmer support.

The following pictures are in sequence... "before", "during" and "after"

One must also consider that when the wing is in place, the surface of the wing that touches that area will help to hold it in place. It shouldn't wiggle around quite that much. If anything, the foam will compress a bit but not allow the anchor to wiggle like that. I think if the screws aren't turned overly tight, it should be OK.

[themudduck]

One must also consider that when the wing is in place, the surface of the wing that touches that area will help to hold it in place. It shouldn't wiggle around quite that much. If anything, the foam will compress a bit but not allow the anchor to wiggle like that. I think if the screws aren't turned overly tight, it should be OK.

I wiggled the part in the video to illustrate that they were loose and the foam there didn't have much strength. But I do agree with you, under compression it won't move around. See the thing is, my wing wasn't sitting down all the way in the TE part of the saddle - there was a gap. As a result the wing cover was sitting up about 1/8 inch. So I tightened up those screws. Instead of pulling the wing down, it pulled the mounts up (and into the bottom of the wing, compressing the foam). There is only about 1/8" of foam above the plastic mounting pad on the saddle, so there wasn't much there for it to pull against. So my concern is that the foam isn't strong enough there. Also I found that the plastic parts weren't glued in very well.

Anyway I just completed my modification. It was very simple and they are much more secure. I haven't put the wing back on yet, I need some time for the glue to dry.
Of course I'm also going to check that the wing is fitting properly in the saddle. It seems pretty good.

[rifleman_btx]

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

[themudduck]

Here's a pic... I've been working this afternoon on a few details:

a) I trimmed the nose and installed that nice bombardier's office picture (see post 405)
b) I re-painted the OD anti-glare panel in front of the cockpit and also painted the cockpit interior
c) I re-painted the shirts on the pilots
d) I added a mustache and wing pin to the pilot (co pilot hasn't started shaving yet)
e) taa daa

[xviper]

See the thing is, my wing wasn't sitting down all the way in the TE part of the saddle - there was a gap. As a result the wing cover was sitting up about 1/8 inch.

Mine has the wing cap sticking up, however, there is no gap between the underside of the wing and the fuse. In my case, cinching down those screws would not pull the wing any closer to the fuse. The lip on the wing cap will still be there. I think the wing cap itself needs to be shaved. I'm not going to bother, just put some Blenderm along the front edge to keep it down. The rear, I'll leave it. I'm not much into cosmetics, only that it flies.

[rifleman_btx]

Possibly the winner? Check out the up pull on the right side vs left.