Official Dynam 1500mm B-26 Marauder Thread

[rifleman_btx]

Yeah, all you gotta tell them is shut up and read your user name out loud. Ha! :Cool:

[quitcherbitchen]

So after my bomb bay mod of moving the servos to the aft compartment and taking out the tail weights I am able to balance at 60mm with not only a 3300 4 s Glacier battery, but also a 2200 4s. The 3300 is forward and the 2200 is all the way back. Is 57-60mm the accepted CG location?

[themudduck]

So after my bomb bay mod of moving the servos to the aft compartment and taking out the tail weights I am able to balance at 60mm with not only a 3300 4 s Glacier battery, but also a 2200 4s. The 3300 is forward and the 2200 is all the way back. Is 57-60mm the accepted CG location?

That is the CG that I am using. I haven't tried a 2200 but I'll bet it will fly really well with it.

[rifleman_btx]

60 to 65 seems to be best really for mine, of course I'm flying heavy with 4k and 5k batteries

[quitcherbitchen]

I weighed mine with a load of bombs and with the battery (3300 Glacier) inside. 6.3lbs.

[rifleman_btx]

Should be alright

[Saltydawg]

You haven't tried the landing gear yet.

Yes, I have tried my gear multiple times with a short pause between cycles. It hasn't failed to work yet. But if it does we grow a stretch of tall grass that runs parallel to our runway just for such issues and for people who simply belly land.

[rifleman_btx]

That's a good idea

[Mad Baron]

I am needing some help. I took my B-26 flying today (light breeze and sunny skys) I put one flight on it and it flew great let it sit for about 30 minutes and flew it again about 3 minutes into the flight it was in a left turn and I heard a pitch change in the motors because it banked real hard I was able to recover it I thought that I overcorrected the turn. About anther minute into the flight the motors seemed to be cutting out I immediately set it up for landing and as I was ready to touch down one of the motors dropped rpm which made for semi controlled landing that bent the crap out of the nose gear. I replaced the broken prop and ran up the motors for bout 1-2 minutes and they seem to run fine but after shutting down the motors the prop nuts were really hot as well as the battery lead in the plane was warmer than it should be. I have cooling holes cut out in the cowl. Any thoughts? Any help would be appreciated!

[TiredIronGRB]

I am needing some help. I took my B-26 flying today (light breeze and sunny skys) I put one flight on it and it flew great let it sit for about 30 minutes and flew it again about 3 minutes into the flight it was in a left turn and I heard a pitch change in the motors because it banked real hard I was able to recover it I thought that I overcorrected the turn. About anther minute into the flight the motors seemed to be cutting out I immediately set it up for landing and as I was ready to touch down one of the motors dropped rpm which made for semi controlled landing that bent the crap out of the nose gear. I replaced the broken prop and ran up the motors for bout 1-2 minutes and they seem to run fine but after shutting down the motors the prop nuts were really hot as well as the battery lead in the plane was warmer than it should be. I have cooling holes cut out in the cowl. Any thoughts? Any help would be appreciated!

Check your ESC to motor leads, mine had one lead that was only held on to the bullet connector by one little strand of solder.

[Bearcat]

sounds like you have a motor that might be bad and drawing a lot more amps than it should, can you turn it by hand freely,have you checked it with a watt/amp meter?

[Mad Baron]

Check your ESC to motor leads, mine had one lead that was only held on to the bullet connector by one little strand of solder.

I was thinking that might be a problem with my plane is it difficult to access the esc?

Bearcat
I am not sure how to check it with watt/amp meter. Both motors turn freely but they sound different when they are spun by hand.

[Hardway]

Just guessing, but it does sound like a motor failure. Could be the ESC like TI stated, but go motor first and work your way back. Glad it got down in one piece. More or less!!! :Cool:

[Mad Baron]

Yeah I was really worried when it was acting up in flight I had visions of a busted up plane I was very glad that it landed with minimal damage.:Whew: I am going to look at these motors it just seems odd that both motors got real hot.

[TiredIronGRB]

I was thinking that might be a problem with my plane is it difficult to access the esc?

Bearcat
I am not sure how to check it with watt/amp meter. Both motors turn freely but they sound different when they are spun by hand.

Pull the cowls and cut a hole on the bottom of the nacele and you'll see the ESC.

[Mad Baron]

Thanks TI. I put an amp meter on the input lead from the battery and it was pulling 7 amps at half throttle seems a little high to me.

[Mad Baron]

Well I got to the motor wires and they had corrosion on the bullet connectors I am going to get some new connectors and see if that will help. I had to replace the front retract so I pulled out and found these nuts glued to the retract..... UNBELIEVABLE!!!:Thinking:

[Hardway]

What are they for? Spacers? wow......

[rifleman_btx]

Yeah mine had them as well

[Hardway]

Top notch quality! Spared no expense!!!