Official Dynam 1500mm B-26 Marauder Thread

[Tony617]

Hey Tony, yeah the numbered wires were a bit of a pain to figure out. I hooked mine up to a servo tester and then relabeled most of them (there are a few that were self-evident like the retract and nose steering/rudder.)
So you're telling me that the instructions showed what those numbers meant? Wait... Ah - HAH! :Dizzy: (I just glanced at the instructions, but I did watch Pilot Ryan's build video!!) :Silly:

The only other Dynam RC airplane I have is the F6F Hellcat V1 which does not have flaps. It was easy to set the Hellcat up since the battery hatch opens up and I can see the throttle wires since it comes out of the ESC directly. The B26 not so much. I did use my servo tester to test all of the servos but I did not take the four screws out and remove the B26 wing. Now I just need to work on the hatch that covers the wings.

Tony

[themudduck]

Hey Tony, yeah that B26 has a giant pile of wires in there doesn't it. Fortunately sorting them out went pretty smoothly and once that's done you don't have to deal with it any longer. I used some wire ties to bundle it all up into a neat pile of spaghetti.

I'm still working (obsessing) on my hatch.

You probably saw the previous posts - the wing mounting anchors (in the fuselage) are a problem. I pulled mine out and re-glued them so they're sitting flat on the bottom of the socket instead of at the top (see post# 457). In the original position at the top edge of the fuselage, they simply pull up and get crammed into the bottom of the wing.... and as a result the wing doesn't want to be pulled down in the saddle all the way when you tighten the 4 bolts. That had to be fixed just for structural strength of course - but we were also thinking that if the wing wasn't sitting down properly then maybe that was why the hatch wouldn't fit correctly.

We've also found that the front magnet on the hatch is too low, it needs to be pried off and re-glued in a little higher so that it's the same level as the fuselage magnet.
After I fixed the magnet at the front of the hatch, the hatch fits absolutely perfectly when the wing isn't there.

And after fixing the four wing mounting bolts, the wing pulls down and lays in the saddle correctly. All good so far...
But with the wing installed, the hatch is STILL about 1/8" too high at the back end. It can't go down any farther. Aaaargh. :Angry:

With all the discussion about the incidence of the stab, now I am looking very carefully at the incidence of the wing. Looking at my plane, it appears that the nacelles aren't perfectly parallel to the fuselage - they seem to be tilting down just a bit at the front. I was looking at this last night and I think if I lower the rear part of the wing saddle about 1/8 of an inch, the wing will be aligned correctly (the nacelles will be correct) and the top hatch will fit. And that slight change to the wing will provide a little more lift - and THAT would mean that the "up-trim" and/or the shim for the stabilizer would NOT be needed. See, if the TE of the wing is lowered, affectively you're raising the tail. Something to think about.

:Thinking: I want that hatch to fit! If I can make the plane fly better in the process than that's a bonus.

Maybe I'll work on this tonight, I'll post some pictures.

[Tony617]

Hey Tony, yeah that B26 has a giant pile of wires in there doesn't it. Fortunately sorting them out went pretty smoothly and once that's done you don't have to deal with it any longer. I used some wire ties to bundle it all up into a neat pile of spaghetti.

I'm still working (obsessing) on my hatch.

You probably saw the previous posts - the wing mounting anchors (in the fuselage) are a problem. I pulled mine out and re-glued them so they're sitting flat on the bottom of the socket instead of at the top (see post# 457). In the original position at the top edge of the fuselage, they simply pull up and get crammed into the bottom of the wing.... and as a result the wing doesn't want to be pulled down in the saddle all the way when you tighten the 4 bolts. That had to be fixed just for structural strength of course - but we were also thinking that if the wing wasn't sitting down properly then maybe that was why the hatch wouldn't fit correctly.

We've also found that the front magnet on the hatch is too low, it needs to be pried off and re-glued in a little higher so that it's the same level as the fuselage magnet.
After I fixed the magnet at the front of the hatch, the hatch fits absolutely perfectly when the wing isn't there.

And after fixing the four wing mounting bolts, the wing pulls down and lays in the saddle correctly. All good so far...
But with the wing installed, the hatch is STILL about 1/8" too high at the back end. It can't go down any farther. Aaaargh. :Angry:

With all the discussion about the incidence of the stab, now I am looking very carefully at the incidence of the wing. Looking at my plane, it appears that the nacelles aren't perfectly parallel to the fuselage - they seem to be tilting down just a bit at the front. I was looking at this last night and I think if I lower the rear part of the wing saddle about 1/8 of an inch, the wing will be aligned correctly (the nacelles will be correct) and the top hatch will fit. And that slight change to the wing will provide a little more lift - and THAT would mean that the "up-trim" and/or the shim for the stabilizer would NOT be needed. See, if the TE of the wing is lowered, affectively you're raising the tail. Something to think about.

:Thinking: I want that hatch to fit! If I can make the plane fly better in the process than that's a bonus.

Maybe I'll work on this tonight, I'll post some pictures.

I will look at my nacelles and see as well since I did not check of they are parallel to the fuselage or not. I too used wire ties to fasten the bundle of wires from the servos and put to the right of the LiPO.

Tony

[borntoolate]

Here are some pictures of my progress. I posted these on RCG. Still not finished with the bomb bay and new decals are on order.

Bob

[ruffneckx1]

borntoolate...your photos are not coming thru. :Confused:


Woody

[Tony617]

Here are some pictures of my progress. I posted these on RCG. Still not finished with the bomb bay and new decals are on order.

Bob

I don't see any pictures.

[borntoolate]

I see them. Maybe they are too large. I will re-send them smaller.

Bob

[borntoolate]

Smaller versions.

[ruffneckx1]

Ok, That did it. :)


Woody

[rifleman_btx]

Very nice!

[rifleman_btx]

Hey Tony, yeah that B26 has a giant pile of wires in there doesn't it. Fortunately sorting them out went pretty smoothly and once that's done you don't have to deal with it any longer. I used some wire ties to bundle it all up into a neat pile of spaghetti.

I'm still working (obsessing) on my hatch.

You probably saw the previous posts - the wing mounting anchors (in the fuselage) are a problem. I pulled mine out and re-glued them so they're sitting flat on the bottom of the socket instead of at the top (see post# 457). In the original position at the top edge of the fuselage, they simply pull up and get crammed into the bottom of the wing.... and as a result the wing doesn't want to be pulled down in the saddle all the way when you tighten the 4 bolts. That had to be fixed just for structural strength of course - but we were also thinking that if the wing wasn't sitting down properly then maybe that was why the hatch wouldn't fit correctly.

We've also found that the front magnet on the hatch is too low, it needs to be pried off and re-glued in a little higher so that it's the same level as the fuselage magnet.
After I fixed the magnet at the front of the hatch, the hatch fits absolutely perfectly when the wing isn't there.

And after fixing the four wing mounting bolts, the wing pulls down and lays in the saddle correctly. All good so far...
But with the wing installed, the hatch is STILL about 1/8" too high at the back end. It can't go down any farther. Aaaargh. :Angry:

With all the discussion about the incidence of the stab, now I am looking very carefully at the incidence of the wing. Looking at my plane, it appears that the nacelles aren't perfectly parallel to the fuselage - they seem to be tilting down just a bit at the front. I was looking at this last night and I think if I lower the rear part of the wing saddle about 1/8 of an inch, the wing will be aligned correctly (the nacelles will be correct) and the top hatch will fit. And that slight change to the wing will provide a little more lift - and THAT would mean that the "up-trim" and/or the shim for the stabilizer would NOT be needed. See, if the TE of the wing is lowered, affectively you're raising the tail. Something to think about.

:Thinking: I want that hatch to fit! If I can make the plane fly better in the process than that's a bonus.

Maybe I'll work on this tonight, I'll post some pictures.

Just be careful with that, you do want a slight amount of down thrust. Fortunately since it's counter rotating you don't need the right angle thrust. But just keep that in mind when/if you mod that.

[fieldofdreamsflyer]

Smaller versions.

Your pilots look to big

[rifleman_btx]

They will go though the weight program. Lol

[themudduck]

Just be careful with that, you do want a slight amount of down thrust. Fortunately since it's counter rotating you don't need the right angle thrust. But just keep that in mind when/if you mod that.

I agree... And this may not be even needed for everyone. It looks like on Bomber Bob's plane, the wing is correct (the cover fits) and the nacelles look perfect. Dammit. Anyway I'll post some pics and see how it develops.

heh - I painted a mustache on my pilot as well!

[rifleman_btx]

Absolutely, my replacement props are out for delivery today. So tomorrow I will be able to test mine with the CG change and tail incidence change as well. Then while I'm out there I might swap the props around so I can report any difference

[TiredIronGRB]

Here are some pictures of my progress. I posted these on RCG. Still not finished with the bomb bay and new decals are on order.

Bob

Bob, have you ever used these on bomb bay mods?

[Hardway]

Those work great!!! I still have to maiden my big B-25... Had it for over a year! LOL

[rifleman_btx]

Ready for remaiden tomorrow

[Hardway]

Hey!!!! Those props look new,,,,,,, ;)

[TiredIronGRB]

Ventilation...