Official Dynam 1500mm B-26 Marauder Thread

[rifleman_btx]

That's a beautiful interior setup Hardway! OV10 makes me wonder greatly indeed

[rifleman_btx]

And I am going to replace the elevator servo with a MG Freewing (17g) servo from the F-14 elevator. (I used HS-82MG's with 2/56 ball links and some tricks to get rid of the chatter in the full flying stab on the F-14). Don't want to land like TI. I have done that before, and it is a bit tricky!! And I will be adjusting the horizontal stab incidence as well... Thanks to all who have contributed to the knowledge base on this bird!! :Drinks:

Don't forget, change the tail incidence approximately 1/8" trailing edge up for improved flight

[Hardway]

Doing it today!!! Thanks again!! I am finally enjoying this model. When I opened the box, not so much!!! It is growing on me... I am thinking of reversing the motors so they spin the props to the outboard.... Think about this... When they spin inboard, the p-factor is loaded into the center mass of the fuselage. That may result in some of the tendency to snap... If the props spin outboard, the p factor is spread out to each wingtip. It may make it more stable, UNLESS you lose a motor, then say bye-bye unless you are fast on the throttle. I am going to use a CC 20 amp BEC (overkill) and a A3-L gyro. I have them in just about all my planes and I think this one will benefit from it... Any thoughts on all that?

[rifleman_btx]

Absolutely! Makes since to me. I may also try that with the motors I've also thought about running a gyro on mine as well.

[Bigrc2]

[rifleman_btx]

Looks awesome

[borntoolate]

Very nice work, Brent!


Bob

[Bigrc2]

She's ready for her maiden. I'm planning on Friday for the big event. Unfortunity, the Robart diamond threaded wheels I ordered won't arrive until then, so I'll go with the 'Fat Boys' for the first couple of flights. My first attempt at doing weathering with the salt and water method worked out pretty well. And putting the Flak Bait nose art on took some patience. The bombs had a tendency to lift off the backing. Still have the landing lights to sub out for white ones and to repostions the green/red to the wing tips.

[rifleman_btx]

Also don't forget to adjust the tail incidence as discussed above, work like that must be preserved

[Hardway]

Very nice work, Sir!!! Good luck on your maiden.... It is a beautiful model!

[Hardway]

Here are the spacers and the adjustments to the horizontal stab... Need to sand a little more on the leading edge bottom of the stab to get it smoother and a better transition to the new angle.

[Bigrc2]

Also don't forget to adjust the tail incidence as discussed above, work like that must be preserved

Thanks, Rifleman. Will add the 1/8" elevator shim tomorrow.

[Bigrc2]

Here are the spacers and the adjustments to the horizontal stab... Need to sand a little more on the leading edge bottom of the stab to get it smoother and a better transition to the new angle.

Good job, Hardway. The pic will be a great hope.

[ryramZ]

She's ready for her maiden. I'm planning on Friday for the big event. Unfortunity, the Robart diamond threaded wheels I ordered won't arrive until then, so I'll go with the 'Fat Boys' for the first couple of flights. My first attempt at doing weathering with the salt and water method worked out pretty well. And putting the Flak Bait nose art on took some patience. The bombs had a tendency to lift off the backing. Still have the landing lights to sub out for white ones and to repostions the green/red to the wing tips.

That looks great! I was worried about the decals sticking so I put a coat of wbpu on first. I'm sure it helped.

On the matter of incidence I recommend saving that for later. Cg on the lines I show in the video and give it 2-3 mm up trim to start. If you removed the tailweights you may need more. The Hoosier racing slicks will work fine. They are light and you won't see a pitch change when you work the gear up or down. Low throw on elevator and mind the flare with some throttle.

Calibration required to sync motors and your good.

Looking good!

[rifleman_btx]

Or just do the mod have a flatter flight surface reduce the drag and gain the speed

[themudduck]

The incidence of the tailplane is what seems to be causing this weird situation:

Original incidence = tendency to pitch down, hence the feeling its nose heavy and the need for tail weights and about 1/8" up trim. Limit the elevator throw.
Corrected incidence = plane doesn't need up trim to fly level, and balances the same or slightly forward. Still limit the elevator throw.

In other words, it isn't nose heavy. Mine was tail heavy. So I removed the tail weights and I moved the balance point forward a bit.
I'm recommending using a smaller battery. I'm using a 3600 (with no tail weights) and the battery sits further forward to balance at 57mm (the 4000 was way back)

I'd really like to see some more flight reports from guys who have done the mod, so we can get a few more opinions about how it affects the flying and also get some more opinions on the best balance point (noting the flying characteristics) before we recommend that everyone do these things.

[rifleman_btx]

I should be able to fly mine Thursday. So far, 2 have noted the mod to be very successful. I'm positive mine will be as well.

[themudduck]

Rifleman, I'm confident the stab mod will eliminate the need for up elevator trim. But I'm still worried about your balance point. I know you're experienced, so do some tests to see if its tail-heavy or not.
I have a feeling you'll see that it is tail heavy at 65. I'll be anxiously awaiting your report! Time for me to crash... :Sleeping:

[Hardway]

Mud!!! Dang! Don't say crash! How about time for a long nap!! HA!! Night guys! :-)

[rifleman_btx]

Rifleman, I'm confident the stab mod will eliminate the need for up elevator trim. But I'm still worried about your balance point. I know you're experienced, so do some tests to see if its tail-heavy or not.
I have a feeling you'll see that it is tail heavy at 65. I'll be anxiously awaiting your report! Time for me to crash... :Sleeping:

Copy that, I'll definitely let y'all all know what happens