Official Dynam 1500mm B-26 Marauder Thread

[Mad Baron]

Had an AWESOME day today! Got 3 great flights on my B-26 today taking out the shim and adding some more expo to the ailerons made all the difference on my plane. I have very little up trim added in and with a 40-50 foot takeoff roll it lifted up and took flight and after trimming out the elevator and aileron it flew hands off. When it comes time to land I put in half flaps and control the landing with the throttle it practically lands itself!:Cool:

[rifleman_btx]

Nice

[handyman220]

Had an AWESOME day today! Got 3 great flights on my B-26 today taking out the shim and adding some more expo to the ailerons made all the difference on my plane. I have very little up trim added in and with a 40-50 foot takeoff roll it lifted up and took flight and after trimming out the elevator and aileron it flew hands off. When it comes time to land I put in half flaps and control the landing with the throttle it practically lands itself!:Cool:

Nice to see all your efforts finally paid off.:)

[Alpha]

I can't recommend Adam's bombs highly enough. They're really fun, well made, straightforward, and effective. He's right on target (pun intended) about the "string" of bombs. I've watched him hit targets at Apollo with startling accuracy. We sell Techone and Dynam servos in the 2-4g range. 2.5g is more than enough to acurate the mechanism. Mine is on a dial, just because I found that sometimes the servo buzzes depending on how much load is in the bomb itself.

[rifleman_btx]

I'm thinking about pulling the main retracts and replacing them with the units from my crashed P38. The dynam units are really pissing me off now. They start their cycle then one side stops when in flight. Then after i land it, they will cycle perfect until I take off again then it starts it's b.s. again. I've had enough.

[Bearcat]

I'm thinking about pulling the main retracts and replacing them with the units from my crashed P38. The dynam units are really pissing me off now. They start their cycle then one side stops when in flight. Then after i land it, they will cycle perfect until I take off again then it starts it's b.s. again. I've had enough.

Rifleman, take off each retract and loosen the screws by 1 turn and give it a try, I got this advice 5 years ago from the Dynam A-10 forum and it goes help until you get around 50 degree..

[Bearcat]

Wanted to say I was lucky enough to meet Warbird Bob and his wife over the weekend and some good food from Shoney's!
Bob Thanks for the B-26 Fuselage as I will put it to good user someday.

[CFIT rob]

Rifleman....one of my mains stuck half up on my second flight. Drove me nuts for the next handfull of flights. Land, pick up,cycle gear....no problem. Bench test worked every time.....until i turned her upright. Every time i was checking the gear i had her on her back. Something about the wormdrive and what little load there is on the way up. A few cycles of it "catching" and it went fubar. Motion sent a new one and its been fine since. Oddly enough the other main failed in the very same manner a couple weeks ago......hmmm.

[xviper]

Rifleman....one of my mains stuck half up on my second flight. Drove me nuts for the next handfull of flights. Land, pick up,cycle gear....no problem. Bench test worked every time.....until i turned her upright. Every time i was checking the gear i had her on her back. Something about the wormdrive and what little load there is on the way up. A few cycles of it "catching" and it went fubar. Motion sent a new one and its been fine since. Oddly enough the other main failed in the very same manner a couple weeks ago......hmmm.

Is it getting cold where you fly?

[Mark 2]

Rifleman, take off each retract and loosen the screws by 1 turn and give it a try, I got this advice 5 years ago from the Dynam A-10 forum and it goes help until you get around 50 degree..

Is this for the screws that hold the retract into the wing or the screws that hold the two halves of the retract unit’s case together?

[CFIT rob]

Its was warm(80s) when i had my failures, no flights under 70 F. Been unusally warm till now ,now below normal (think my ex wife must have returned to the state. Yup... so cold she made the furnace kick on.) Im going to experiment myth buster style with a spare main and my glitching main, see what it takes to make 'em fail.

[Dewey H Lee]

Also check and see if your end points on your tx does anything. This helped with a bird that i had trouble with that XVioer suggested to me. I thought that once it was activated it went through the cycle unless it binds up but strangely enough it made a difference. Mine was not Dynam and was not working at all and then change what Xviper told me to and they were good and then started doing almost the samething later as yours. Fiddled with the end points again and was good to go. Only 8 flights since though. Long shot but maybe. Not the expert these guys are. THERE GURU'S. :) . If it wasn't for them id be lost:Confused: halve the time.

[Bearcat]

Is this for the screws that hold the retract into the wing or the screws that hold the two halves of the retract unit’s case together?

That holds the halves together

[Alpha]

CFIT Rob, we conducted similar cold temperature tests on these new V2 retracts when they were redesigned. Granted it was the summer outside, but we controlled for temperature and humidity down to freezer temps. The V2 retracts were noticeably less prone to stalls than the original Dynam retracts in these tests, due in part to a couple key redesigns:

For one, the PCB elements are less exposed, and the microswitches are pyramids. The older flat style microswitches required precise alignment otherwise they wouldn't depress. The new V2 microswitch's pyramid shape accepts a wider range of leadscrew position in order to depress or release the switch. The margin for error literally multiplied by a factor of five. Importantly, the V2 switch is SMT soldered by machine for consistency compared to the hand soldered V1 microswitch, making failures due to alignment almost a thing of the past according to our Service Center data collected since the V2s were rolled out earlier this year. The PCB layout also requires less lubricant, which was also prone to fouling the mechanism in colder conditions. They were using the wrong viscosity and amount.

Please post your results here! I expect they will match what our tests found.

[CFIT rob]

Alpha...when do you sleep? Your devotion should be a model for every american business. Im starting to picture your company a bit like wonka's chocolate factory. All the wonderful toys. The R&D. The committed staff. I would love to see pilot ryan dressed as an oompa-loompa. Ive been around boat/engine mfgrs as a shop owner/mechanic for 30 years, if there is a V2 of a problamatic part, that usually adresses the problem. Temps are returning to normal so it may be a few weeks to get real world results. "Lab" testing this weekend. Testing will be true to my mythbuster heros.

[Bearcat]

Better yet I would love to work for them...

[rifleman_btx]

Rifleman, take off each retract and loosen the screws by 1 turn and give it a try, I got this advice 5 years ago from the Dynam A-10 forum and it goes help until you get around 50 degree..

Copy that, will give that a go

[themudduck]

So, its on sale now for $209. That's a nice price! Just buying the retracts, motors, escs, props and hubs separately costs almost $150. I'm tempted to get one just for all the spare parts.

Its the pilots, that's where the money is. I bet they sell a lot of those spare pilots.

[TSHobbies]

realll tempted to get one now lol

[NoDirt!]

So, its on sale now for $209. That's a nice price! Just buying the retracts, motors, escs, props and hubs separately costs almost $150. I'm tempted to get one just for all the spare parts.

Of course! I just got one :Silly: