Official Dynam 1500mm B-26 Marauder Thread

[ruffneckx1]

Congrats on the maiden. OUTSTANDING job on the paint / weathering. :Cool:


Woody

[quitcherbitchen]

Nice Brent. Corey did great and it makes your WOW planes B-26 look amateur both in looks and flight characteristics.

[Bigrc2]

Thanks guys for the kind words. All the effort I put into her was well worth it. Here are a few more pics I took at Apollo on the day of the maiden.

[Bigrc2]

Nice Brent. Corey did great and it makes your WOW planes B-26 look amateur both in looks and flight characteristics.

Adam, I'm going to hang the WOW B-26 up and chalk it up for experience.

[terrygrau]

Remaidened yesterday 8-24 with new fuselage. Flew great.
But I still can't figure out these tail weights. I removed both from tail used a 4000/4 battery all the way back and a CG of 70mm.
Based on reports here there is very little in common with other setups. How can the same aircraft be flown with and without the tail weights of such large size?
I also opened up the cowl oil cooler air scoop , underlying foam and plywood motor mount. Giving airflow to the esc and out the wheelwell.
If the tail weights are not necessary then why are they there? Were the motors changed during production to lighter units and weights were already there?
I give up and will just enjoy flying it.
Terry

[rifleman_btx]

Indeed, that's what it's all about in the end enjoy a great flying model. I'm approximately 65 miles north of the eye of Harvey now. So far everything is ok here. Obviously alot of wind and rain

[themudduck]

I flew mine today, two nice flights. I added a 2mm shim to the back of the stab (I had already lowered the LE a bit) and now I fly with no up trim.
I'm using no tail weight, a 3600mah battery in the middle of the tray with the balance point at approx. 55-57

I also installed regular wheels. I need to re-attach the nose gun!

Not sure how some of you are doing it with 65 or 70, my feeling is that it is tail-heavy there but... it still flies well. Mine flies really well. No issues at all.
Today I took it upstairs (2 mistakes high) and tried to stall it with the flaps, feeding in more and more elevator. It almost stopped in midair before it gently dropped off to the left.
When I come in to land using full flaps, it just floats in at low speed and I can hold it with the nose up forever.

After all the work it took to correct the various problems, such as reducing the elevator throw and fixing the stab and the wing mounting points (and yesterday I finally got my hatch to lay flush, yaaay), I have to say that this plane is a really nice flyer and I wouldn't hesitate recommending it to anyone who's interested. I do like warbirds that fly realistically. This one isn't very fast.... but that is OK.

Here's a pic of it sitting on the table, you can see that the nose is up a little (the nose wheel is slightly larger than stock) - I find this stance helps it take off a little easier especially on grass.
I also feel this is closer to the way the full-size plane sits on the ground.

.

[Tony617]

Any suggestions for compatible tires for B26? I only have a short cut grass airfield or a public park to fly out of close by. I was looking at Du-Bro treaded tires but the width in not as wide compared the Dynam tires on the B-26.

The main gear is 75mm X 33mm and nose is 55mm X 22mm (measurements are approximate):

Du-Bro 3.00" is 76.2mm X 26mm wide
Du-Bro 2.25" is 57.15mm X 20mm wide

Tony

[rifleman_btx]

Absolutely! Very nice indeed!

[themudduck]

Any suggestions for compatible tires for B26? I only have a short cut grass airfield or a public park to fly out of close by. I was looking at Du-Bro treaded tires but the width in not as wide compared the Dynam tires on the B-26.

The main gear is 75mm X 33mm and nose is 55mm X 22mm (measurements are approximate):

Du-Bro 3.00" is 76.2mm X 26mm wide
Du-Bro 2.25" is 57.15mm X 20mm wide

Tony

I'm using Du-Bro 2.75" treaded for the mains, and a Dave Brown 2 3/8 wheel for the nose. Your suggestions would work well too. I used an extra collar on the inside and cut the protruding end of the axle off using a Dremel..

[borntoolate]

I have spent the better of 2 days fooling with the bomb bay on this plane. I finally managed to get it working overall. It still need some tweaking with the radio as well as my razor knife. I know it isn't a scale bomb bay, but I felt that was beyond me at this point. Maybe on the next B-26 I will try the stock type of bomb bay.

It does just fit 2 Adam bombs.


Bob

https://youtu.be/LsPY9QYAwY4

[TiredIronGRB]

Nice work Bob!

[RRHandy]

To me it looks like all you need to do it adjust the travel when closing, other wise looks good. R.

[borntoolate]

Thanks,

Yeah, the travel need to be adjusted and I want to re-do the hinges on one side. Maybe tomorrow I can wrap it and apply the decals. I am just too tired to continue working on it tonight.


Bob

[Hardway]

Trying to get this buttoned up today. Doing electronics and details... Replaced the elevator servo with a 17g MG from Freewing. Using a CC 20 BEC and added telemetry wires for the flight pack voltage. Replaced the Y and 3-Way connectors in the wings and changed out the aileron extension wires since they were glued and stiff at the connection points. Then used heat shrink to secure them all and get them into a "neat" rat's nest! LOL Opened up the dummy engines to help the ESC's breath. Have to clean up the openings a bit. Then I am going to pull the motors and check the ESC connections and heat shrink them together if possible... May reverse the motor rotation to spin the props outboard.

[Hardway]

On the underside of the wing, you can see how crushed the attachment points were from the mounts breaking loose in the fuselage. Also, the wires were pinched in the saddle too.. I am so glad I took the wing off!! Hope all the issues are sorted out now.... :Drinks:

[rifleman_btx]

Absolutely, I really think it is an absolute must to remove the wing and do a complete check over.

[borntoolate]

Absolutely, I really think it is an absolute must to remove the wing and do a complete check over.

Agreed. Better before you fly than later in a "what the hell happened" mode.

Bob

[borntoolate]

As promised here are some pics on the inside of the bomb bay. It is certainly not my best work, but this plane really frustrated me! The fuselage in the area where you will hinge is structurally weak. I will beef mine up a bit and re-hinge them. I will also fabricate some polystyrene doors instead of foam.

It will hold two "Adam Bombs".

Bob

[borntoolate]

Except for some final touch-ups and finalizing the radio stuff, my first B-26 is done. Well, they are never really done, but she is ready to fly once her radio tweaks are done. Her bomb bay will hold two "Adam bombs", but I do plan to modify the bay with some re-inforced hinges and some polystyrene doors... one thing at a time!

Bob