Official Dynam 1500mm B-26 Marauder Thread

[quitcherbitchen]

Here is the combat footage of my Saturday's mission at Apollo Field. It was windy and the plane is a handful in wind. I will be putting in a Gyro for sure now. flying around at full throttle too most of the time.

[rifleman_btx]

Nice! And yes i agree, gyro her up!

[borntoolate]

Here is the combat footage of my Saturday's mission at Apollo Field. It was windy and the plane is a handful in wind. I will be putting in a Gyro for sure now. flying around at full throttle too most of the time.

I agree with both the gyro and the need for more power. Both of my B-26s have Lemon Plus receivers with stabilizer. I have only up-motored one of them to date. I put 11Hobby Bearcat motors in and the difference is amazing. One half throttle on the modified B-26 is equal to full throttle on the stock plane. When I get time, I will modify the stock plane with the new motors.

Bob

[NoDirt!]

Those hits were pretty close though. Closer that I've gotten :P

[quitcherbitchen]

I have been thinking about moving the motors off my B-24 to this plane. Just thinking about it and need to measure the length and bolt pattern. Obviously, a new prop adapter from Custom RC or move the shaft. Just wonder what the amp draw on 4 s and four blade prop would be?

[xviper]

I have been thinking about moving the motors off my B-24 to this plane. Just thinking about it and need to measure the length and bolt pattern. Obviously, a new prop adapter from Custom RC or move the shaft. Just wonder what the amp draw on 4 s and four blade prop would be?

Wow, that would make the B-26 really scoot along. The Dynam has a bigger prop and more pitch by 1, but it also has a bigger ESC (40A vs 30A). The plane is also about 600g lighter. I think the Dynam ESCs can handle it. You should see what a calculator has to say about it. The B-24 motors are a bit longer so they may stick out further.
If you do it, let us know what happens. Sounds like a potentially great power mod and easy.

[borntoolate]

I agree with both the gyro and the need for more power. Both of my B-26s have Lemon Plus receivers with stabilizer. I have only up-motored one of them to date. I put 11Hobby Bearcat motors in and the difference is amazing. One half throttle on the modified B-26 is equal to full throttle on the stock plane. When I get time, I will modify the stock plane with the new motors.

Bob

Update:

I had a rare weekend off this week so on the table went my first B-26 (Silver). By the end the day she had new 58 amp ESCs, new Bearcat motors and all new Freewing retracts. Now she is up to par with her olive drab sister!


Bob

[Amain 416]

I through this is really cool. Its on the Moiton Rc sight under the B26.

[Builda]

Update:

I had a rare weekend off this week so on the table went my first B-26 (Silver). By the end the day she had new 58 amp ESCs, new Bearcat motors and all new Freewing retracts. Now she is up to par with her olive drab sister!


Bob

Hey dude, do you put eleven hobby bearcat motors and 58a esc’s In your B26! You certainly have my attention now lol-what’s the Watts/amps figures like on the motors vs what the motors are rated as I notice the eleven hobby bearcat is a 3S plane? I only ask because I have been burnt following advice of others on RCG with this kind of mod and ended up melting my motor mount plate! Also, what’s this “Freewing retract mod” you speak of?? (My B26 is on order and due in the next few days so I’m all ears on decent and proven modifications). Thanks in advance!

[borntoolate]

Hey dude, do you put eleven hobby bearcat motors and 58a esc’s In your B26! You certainly have my attention now lol-what’s the Watts/amps figures like on the motors vs what the motors are rated as I notice the eleven hobby bearcat is a 3S plane? I only ask because I have been burnt following advice of others on RCG with this kind of mod and ended up melting my motor mount plate! Also, what’s this “Freewing retract mod” you speak of?? (My B26 is on order and due in the next few days so I’m all ears on decent and proven modifications). Thanks in advance!

I flew my Bearcats - 3 of them - all on 4S. Not to be a hot-rodder, I just have lots of 4S batteries. It has been awhile but I am sure I upgraded the ESC's in the Bearcats. I never had issues with the Bearcats. The motors were available and the motors/esc set-up in the stock B-26, in my opinion, is anemic. Had to fly at mostly full throttle during the flights.

As for the retract mods - I have almost always has trouble with Dynam retracts. I replaced the main retracts with Freewing MiG21 retracts. The nose gear retract was replaced with an FMS P-39 nose gear retract. The mains dropped right in, the nose required some modification. I also added oleos to the retracts.

The new motors give the plane the speed that it was lacking. And the retracts work every time!


Bob

[edwarda10pilot]

Hello everyone. I have just purchased the Dynam B26 and have a question regarding the location of the CG. The manual (if you can call it that) suggests that the CG is between 70 and 75mm aft of the leading edge of the wing at the root. Can some of you chime in on where you have located your CG and how the plane flies at that location? I am in the process of refinishing my plane in the colors and nose art for one of the planes my late uncle flew in World War II. As soon as Callie gets me the graphics, I will post some photos.

Thanks in advance for your input.

Ed

[Mad Baron]

I balanced my B26 at 70mm and it flies well for me.

[edwarda10pilot]

Mad Baron:

Thanks so much. I have mine balanced at 75 but will move it to 70.

Thanks,
Ed

[themudduck]

Mad Baron:

Thanks so much. I have mine balanced at 75 but will move it to 70.

Thanks,
Ed

There's been a long discussion on this thread about the balance point and a bunch of other things that need to be done - read through posts 20-30 (approx.). Of course you'll find lots of opinions here on the Squawk, but here are some tips and a short list of some of the things that you really need to check:
- If top hatch won't fit - move the magnets, the factory glued them in the wrong place (at least on the earlier planes)
- Check the mounts in the fuselage for the wing bolts - they can right pull out. Best to epoxy the mounts into the fuselage.
- Stock plane will need "up" elevator trim.... instead, raise the entire TE of the horizontal stab by 3mm using a shim - your plane will fly a lot better
- There are two weights in the tail (in the space where the tail guns go) - get rid of them
- Check the flap hinges, on many models they are loose (not glued on well)
- Use flaps for takeoff (1/2 position), landing (full position) every time
- Keep the control throw very low on the elevator. Too much elevator and this model will snap-roll in a heartbeat
- Keep the weight down. A 3600 battery works fine. Doing that along with removing the tail weights results in a lighter plane.

I replaced the racing-car tires on mine with skinnier foam wheels from Dubro, and I used a slightly large nose wheel to get the nose up (the real plane sat with the nose up).
I balanced mine between 55-60mm (measured from the LE of the wing where it meets the fuse, not the fillet. Flight testing shows that this is not nose-heavy. But there's been a lot of argument on that.

I made this video specifically to show off how nicely this model flies and how easy it is to make it snap-roll. This is with the forward balance point.
I didn't like the first landing very much, so I did a second flight on the video - second landing was a little bit better!

[Mad Baron]

It seems that each plane is different. Mine still has the tail weights and the 70mm cg works good for me. I also fly mine with a 3600.

[edwarda10pilot]

Thanks guys. I have done some of the things suggested above but will check the wing bolts. Mine did not have any weights in the tail section. I currently have mine balanced at 70 with a 4000 mah battery. I did end up regluing all of the flap hinges as they were either poorly glued or not at all. I replaced the nose and main wheels with some Robart "scale" treaded tires. I also refinished the plane and added some weathering. Will show photos shortly.
Thanks again,
Ed

[edwarda10pilot]

I just finished painting and weathering the Dynam B-26.The story behind this plane, Frances Joan, is that it was the plane one of my uncles (Luis) was flying when he was shot down and lost in a bombing mission over Ovierto, Italy in January 1944. He was on his 36th mission and had he completed one more he would have rotated home. My uncle (pilot/aircraft commander), his co pilot, navigator and bombardier were all lost in the crash. Only the tail gunner and the turret gunner managed to bail out. My dad, two of his older brothers (Luis and Al) and his younger brother William all served in World war II. Luis flew the b-26, Al flew the B-29. My dad and his younger brother were in pilot training in 1944 when the Army Air Corps decided they had enough pilots so my dad was transferred to the infantry where he served with Patton in Europe in 1944 and 45.

For the paint I used Tamiya Olive Drab for the top and sky/blue/gray for the bottom. For the weathering I wanted to simulate the paint peeling off of the plane and exposing the bare aluminum so I used a plumbers acid brush dipped in Tamiya aluminum and just stippled it all over the plane. Once the silver was on the plane I used a tissue to smudge the silver in a direction that looked "right". For the rest of the weathering I use artist pastel chalk. I used pink to simulate the av gas flowing back from the gas caps on the top of the wing and I used the gray, black and brown to simulate oil, grease and wear and tear on the plane. Once I had applied the pastel chalk I then used a tissue to spread the chalk in the direction of airflow for the grease and exhaust stains. I used the black to simulate the corrosion on the plane. I applied the black to the tops and bottom of the wings and tails and spread the chalk aft (in the direction of air flow) and for the fuse and vertical tail I spread the black vertically as it would have flowed down those surfaces while sitting in the elements while on the ground. Once all of this was done I sprayed the entire plane with Tamiya flat clear. I replaced the stock wheels and tires with similar size Robart scale wheels/tires.

Ed

[Mrdronenut]

Hey y'all!!! I just ordered my B-26 from Grayson Hobby. It will be here the 1st of the week. Thanks to all for you're input through out the thread.(HEY BOB!)LOL

[Mrdronenut]

Got it in. It was "as expected". Strange thing tho.......... I got a 5s,4500mah battery,and none of my Dynam planes......not one.......stock everything, would let me set the throttle. Flight surfaces,retracts,everything works. But the motor. It just beeps twice.
Ok all you airplane guru's,figure this out. I can put in a 3s,4s,2s,activates great. 5s.......beep beep..........beep beep........beep beep.

[xviper]

Those ESCs were only meant for 2s - 4s.