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Hitec RCD ProModeler
g5sean

Heliman

Savannah, GA

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Hey Andrew,

If it's not too late, you might consider using a different intermediate 50* box. This one reverses the direction of the tail drive due to the floating gears. The only unknown is if it will fit ok. http://www.psg-dynamics.de/562/prod...ar-hd-peek.html

Sean

02-10-2017 01:29 PM
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bwellmaker

Key Veteran

Long Island

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Dang,

That is a nice looking IGB

UIH,

B

02-10-2017 01:39 PM
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Thumper217

Senior Heliman

Slidell, LA - USA

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Sean,

Thanks for the link. I actually saw that one and it will be option B. If I didn't already have the existing box installed I would probably go this route to start with. It does look pretty sweet but will be an even tighter fit than the one I have.

Andrew

Thumper

02-10-2017 02:59 PM
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Thumper217

Senior Heliman

Slidell, LA - USA

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I need to ask a question. If I go with the IGB that reverses the direction of the drive shaft it will make the tail rotor turn in the correct direction but it will be turning the helical bevel gears in the TRG opposite as well. Can helical cut gears operate in either direction or are they direction specific?

Andrew

Thumper

02-10-2017 03:05 PM
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g5sean

Heliman

Savannah, GA

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Andrew,
IMHO, for this kind of load, it shouldn't be an issue. I would check the TGB mesh and backlash by providing some resistance on the TGB output shaft during the "proper" rotation direction. The gears should be quiet whether the output shaft is loaded or not. As long as the mesh is correct and there isn't any lateral shaft play, I'd be satisfied. I flip the same type of gears around in the Kasama TGB and don't have any issues at all. It's not until you put serious load on palloid spiral bevel that one needs to be concerned with mechanical advantage of gear orientation.

02-10-2017 04:03 PM
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g5sean

Heliman

Savannah, GA

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Andrew,

BTW, this box is 44mm wide, out of curiosity will is fit?

02-10-2017 04:06 PM
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Thumper217

Senior Heliman

Slidell, LA - USA

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Sean, it would fit but it would have to be mounted about 12mm lower than where I have mine which would increase the angle between the output shaft on the mechanics and the tail drive shaft, which on mine is about 3.5*.

Andrew

Thumper

02-11-2017 03:00 AM
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g5sean

Heliman

Savannah, GA

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12 millimeters shmillimeters, HA! Thanks for checking. Not sure what's going on with Baumann, they shipped to me in the past but it's been about two years since the last order. We can chat about a possible solution.

02-11-2017 10:54 AM
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Scorpion Power Hitec RCD
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