M1A1HA, 9/18/23 update. Delay of Game, two week penalty!

[BarryC]

That was the fun part!

Parting the hinged close out plate attached to the aft end of the upper mantel.















That's all for now!
Barry

[Uncarina]

Great job Barry! That took some FINE cutting and filing, but the mantlet modification looks very good, and it's impressive that it's functional.

Cheers, Tom

[BarryC]

Great job Barry! That took some FINE cutting and filing, but the mantlet modification looks very good, and it's impressive that it's functional.

Cheers, Tom

Thanks Tom, I am not to sure how durable it is going to be in the long run. I have been looking for a hinge but so far no luck. I may have to just build my own out of brass tube and sheet.

Barry

[BarryC]

I have discovered the down side of having relocated the main mount pivot. I did not foresee this, should have been more thoughtful!!!!









Another dilemma to solve.....anyone have a suggestion?

Thanks for looking,
Barry

[atcttge]

Awesome! As for the elevation issue, it seems a simple relocation is all you need.

[BarryC]

Thanks Paul and Atcttge, I guess I ended up somewhere in between your suggestions.







On to the elevation servo mounting.....should prove just as challenging!

Thanks for looking in,
Barry

[BarryC]

Recoil and elevation servos and mounting accomplished, well close.

Looking for some guidance; neither servo provides the amount of throw I need. Recoil is about .250” short. The elevation servo gives good depression but the elevation is some 15-20 degrees short of the desired amount. I know I can get a longer servo arm which will get me more displacement but in both directions. Also how do I determine what arm will fit the spline; I know they come in different "sizes".

I am testing with the servo connected directly to the receiver; when connected to a control board will I be able to increase the amount of the throw?

Thanks for looking,
Barry

Photos removed because they no reflect the final servo mounting configuration.

[MichaelC]

Barry,

If you are using Clark, the answer is no. IBU2 is much more parameters based so you might have better luck there. In fact, I think Clark's servo elevation angle is even less than what you get with directly connecting to the receiver. What radio are you using ? Do you have adjustment on it to increase the limit/range ? That would be one way, you might also want to try mapping the elevation to a pot and see if you can get more travel out of it.

If all else fails, you can always find a different angle to tighten the swing arm and see if you can get more elevation out rather than depression perhaps ?

Great build BTW.

MichaelC.

[BarryC]

Barry,

If you are using Clark, the answer is no. IBU2 is much more parameters based so you might have better luck there. In fact, I think Clark's servo elevation angle is even less than what you get with directly connecting to the receiver. What radio are you using ? Do you have adjustment on it to increase the limit/range ? That would be one way, you might also want to try mapping the elevation to a pot and see if you can get more travel out of it.

If all else fails, you can always find a different angle to tighten the swing arm and see if you can get more elevation out rather than depression perhaps ?

Great build BTW.

MichaelC.

Thanks Michael,

Radio: Turnigy 9XR Pro, I am leaning towards the ElMod PRO but have not ruled out the new IBU3.

I have moved the arm around but "no joy", I have determined that I can set the servo itself at an increased angle (raise the aft end) and obtain more elevation and less depression.
I am not sure how much effort to put into this before I get a board then find out I have to redo it.

The servo itself can be manually moved 90 degrees but will only move 60 degrees via the radio; do you know if this is the way it works?

I appreciate the help and kind words on my efforts, I am have fun!

Barry

[MichaelC]

Okay Perfect. My main radio is 9XR Pro. Which channel is the elevation servo map to right now ? Did you get your 9XR Pro from RCTA ? It has ER9X installed on it already if that's the case. If you can send me the initial screen with the servo max out then I can tell you how to adjust it for more travel.