since he did that step ahead , to have these parts already in production ,
and I was impressed of the quality of these parts , judging just by photos ,
I ordered right away a few sets of his gearbox's .
The principle of having 2 motors side by side and driving the out-drive-shafts via bevel-gears
is actually nothing new for tracked vehicles .
That principle is around since I can remember , also found in construction type vehicles .
Roland has the edge on this now , since he grabbed that idea and created his modular type gearboxes .
Now , you wondering , what has that to do with me ?
well , his gearboxes are very nice and a rugged design , but his original versions of gear-ratios and choice of motors
doesn't meet our expectations for our serious tank-battling.
For the scale-modeler his original versions are perfect ,
but for us doing serious tank-battling , we do need different configurations here .
In the meantime , Roland offers now also his gearbox's with various motor-choices .
But they are all 540/550 type motors , which are not so good for our needs
I haven't done yet any comparison tests with his latest motor-options ,
but from my years of experience with gear-ratios and motor-options for the Tamiya DMD's ,
I have learned that the best is to stick with 380/400 size motors
and to get the performance we want after the tank received several hits ,
the gear-ratio needs to be increased for more low end torque
here are now my modified version of his gearbox's :
the first introductory to the public and tests of my modified version
was done during our 2 past events in Danville , March 2013
Jim and Marty ( which had already the original Roland gearbox's )
were very impressed of the change in performance
in between these 2 Danville events , March + May 2013 ,
I upgraded Jim's gearbox's to my version
during the May 2013 event we had already 2x Tiger 1's equipped with these gearbox's
ripping up the Danville battlefield
here are a few feedbacks and comments :
I knew Willy had his Tiger 1 and I was curious to see if his tank “was all that”. It was. It ran well, was smooth, drove like a precision machine.
I went the whole event on less than two battery changes and I did not economize on mileage running around the field.
The Tiger 1 gearboxes are really impressive. I think they would work real well in a KV hull or the new JS hull.
Only drawback is their initial higher cost.But the energy efficiency, stronger design,and improved play value
evens out compared to what you’d invest in and experience when upgrading Tamiya gearboxes anyway.
Daryl Turner , ACE
Willy, I loved the way your mod worked! Thanks for the test drive.
Climbing a steep hill after 8 hits was just what I've been looking for all these years!
Please build a Custom RC gearbox for my new Tamiya JS-2.
Let me know when you are taking orders and I'll send a deposit or full payment.
Thanks, Dana
Dana Lowell , CO: H*E*A*T
I just want to echo Dana's comments, since Willy moded my gear boxes the Tiger has been running like a champ.
There's enough torque left at 8 hits to back up hills, I didn't find any terrain on the battlefield that my Tiger couldn't handle.
The speed is scale and performance is top notch.
I'm going to get another set for my Jagdpanther, well worth the investment.
Jim Farris , NEAT
Jim's video :
Very nice. The turret rotation sounded louder than Willy's TU. He is a true craftsman. He just did my 1/14 King Hauler mods. Enjoy it Jim.
Bob , NEAT
Willy always does great work. As one of the first distributors of Impact gearboxes; he fixed the initial problems and turned them into really smooth units;
much better than any that have been available since. After seeing how nicely they run in your Tiger (thank you for posting the video, by the way),
I am going to pull the trigger on a JS-2 for him to experiment with, and buy a set of them for it as well.