Official Dynam 1500mm B-26 Marauder Thread

**rifleman_btx** · Aug 12, 2017, 02:01 PM

Mine had 2 weights in it viper I think I found your weight...

**Hardway** · Aug 12, 2017, 02:44 PM

What is up with the random weights, or lack of..... That is crazy.... I bet your wing was changing incidence on you in flight,,,

**rifleman_btx** · Aug 12, 2017, 03:08 PM

Quick question, does the middle wing spare part come with the engine necells? Or is it just the wing portion only?

**rifleman_btx** · Aug 12, 2017, 03:09 PM

Originally posted by Hardway

What is up with the random weights, or lack of..... That is crazy.... I bet your wing was changing incidence on you in flight,,,

That's really what I was thinking after pulling it apart

**xviper** · Aug 12, 2017, 03:51 PM

No weight, 1 weight, 2 weights ................... very strange. I wonder if I just haven't found all of them yet.

**rifleman_btx** · Aug 12, 2017, 03:55 PM

Indeed

**TiredIronGRB** · Aug 12, 2017, 05:00 PM

Maidened mine today...no weights in mine, CG at 65mm, used flaps taking off and landing, needs plenty of speed before rotation, added up elevator, flew great and landed like a butterfly

**rifleman_btx** · Aug 12, 2017, 05:18 PM

Wonder if my foam was just weak

**handyman220** · Aug 12, 2017, 05:52 PM

No weights in mine, one of the guns did break loose though.

**xviper** · Aug 12, 2017, 06:34 PM

What are those washer like things for? There are 8 of them.

**ryramZ** · Aug 12, 2017, 07:14 PM

Originally posted by xviper

What are those washer like things for? There are 8 of them.

Props

**rifleman_btx** · Aug 12, 2017, 07:47 PM

Put one on both sides of each prop

**xviper** · Aug 12, 2017, 08:23 PM

Originally posted by rifleman_btx

Put one on both sides of each prop

Thanks. Shoulda paid attention during Ryan's video. :Sleeping:

**borntoolate** · Aug 12, 2017, 08:27 PM

My B-26s arrived today. They were supposed to be here on Monday, but earlier is always better.
My bomber buddies were here and we gave it the once over. Too exhausted to start on her today.
The boxes were huge!

No weights in mine.

Bob

**TiredIronGRB** · Aug 13, 2017, 07:27 AM

Really liking this bird once you get the normal Dynam issues resolved.

**Hardway** · Aug 13, 2017, 11:00 AM

Looks really nice on the grass runway!!! I am glad it flies well for you! I think Rifleman will get his going again too! Those wing mounts were very loose in mine, but not anymore... :-)

**rifleman_btx** · Aug 13, 2017, 11:40 AM

Yeah I'm gonna look at throwing some balsa under the anchor points

**borntoolate** · Aug 13, 2017, 12:53 PM

The top wing cover did not fit well on my bomber. The magnets were not glued in properly. I removed the magnets and the cover still did not fit very well. To fix that, I trimmed the aft side of the cover slightly and also the back portion of the wing, I took off a small portion with a new blade held at about a 45 degree angle. The cover now fits flush. I will work on the bomb bay later today. On the first B-26, I am going to use a conventional type door - like on the B-17. It will not look as cool on the ground as the bi-fold doors, but in the air, on a bomb run, you probably won't be able to see it.

Bob

**themudduck** · Aug 13, 2017, 01:21 PM

Back at home charging after flying... got in two nice flights today and found something very important. If your elevator has too much throw, you will snap-roll this model. I discovered this while doing some tests 2-mistakes high. When I yanked back on the stick the model did a "departure from controlled flight" - into a very fast and nasty 1 & 1/2 snap roll. No aileron or rudder, just elevator. The guys were saying "your elevators must not be adjusted" but that isn't it. It was a classic high-speed stall.

I dialed back the throw and it solved the problem for the second flight. I started with 75% elevator travel on my DX9 and ended up with 55%. This model is short-coupled and reacts strongly to elevator. If you keep the elevator movement low you will have good results. Mine is set now at 1/2" maximum throw each way, and I am not using full up most of the time.

Neutral flight requires a bit of up elevator trim, mine has about 1/8" up. But I don't think its nose heavy. Later on maybe I'll adjust the stab incidence, I bet lowering the LE of the stab by just a bit will fix it.
Balanced at about where the manual says. The battery isn't all the way back - if I push the battery all the way to the back the front Velcro won't hold it... so its about an inch away from the backstop. I put a piece of foam there as a spacer.

I found that the B26 isn't very fast. When you go to full power it doesn't speed up much - but that's OK, I like a plane that flies realistically.
My 4000mah 4S Admiral battery showed 3.8 volts after a 5 minute flight (3.9 when I got home)

I used a little flap for takeoff (maybe 10-12% down) - takeoff was uneventful. Retracting the gear had no affect on trim. I used full flaps for landing. I didn't use any elevator trim at all with the flaps, and I'm not sure it's necessary. With full flaps it handles really, really nice and flares nicely. I really love the way it lands with flaps..

All in all it was really nice flying plane. You just need to be careful with the elevator. Try a loop and pull out too sharply and "pow" it will snap and you'll see why it was called it the "Baltimore *****".
Fly it like a lady and it will reward you.