This is the dual speed gearbox Team 716, The Who’sCTEK’s developed this summer and first ran at Riverrage 7. You can see the ‘square’ dog and, just barely, the ‘square’ hole it fits in. The circular cutout in the back is for the drill motor gearing. We ran without the drill motors as we are still waiting for PIC to send the gears. I will be posting a white paper as soon as I can clean up the drawings.
Andy,
Very nice!
I was at River Rage, and I wish I knew you were using this so I could take a look!
How does the square dog work out? 229 is currently developing our next generation gearbox, and we’re looking at using a Techno-Style dog shifter. How do you think this compares?
Thanks,
John
I Love! the square Dog, Very simple,small, and cheap, i may have to steal it
Thanks John,
The square dog works very well. I had limited air pressure during the event due to flexing in the plywood base. The drivers said they needed to come almost to a stop to shift but they loved the dual speed option.
I was going to introduce myself to you but had lost my voice by the end of the day. You and your team did a fantastic job reffing.
Thanks again,
Andy Brockway
BTW we will be at Bash@the Beach Sept 20, I will also have our original gearbox for everyone to see.
Happen to know off hand how much it weighs?
-Andy A.
Wow, congratulations on a really great job to team 716. That gearbox looks really compact and could be very easily lightened 226 style. It also looks great!
Cory
*Originally posted by Cory *
…That gearbox looks really compact and could be very easily lightened 226 style…
That’s the first thing that I thought, when I saw this picture. The gearbox itself looks incredibly compact. Maybe it’s the orientation playing tricks with my eyes, but wow.
It looks really awesome! Congratulations!
For a little reference, are the outer plates 1/4"?
What are the ratios on that? and what size is everything?
I am planning a white paper detailing the shifter mechanism within the next two months. I will include gear ratios and main plates in the write up.
In the meantime, The approximate weight without motors is 5 lbs. This is only an estimate as I forgot to do a weight check.
The output speed at the shaft is 162/684 rpm for low/high. We reused the gear on the CIM and the sprockets from the output so this dictated some of the ratio decisions.
This box is 2-5/16" wide by 2-3/4" tall. I am guessing it to be about 7" long, I left the file at home. The plates are 1/4", the ouput bearings are not flanged so the button heads keep them in.
I have been running flat out the last few weeks at work so I am a little behind on everything. I will answer questions as fast as I can.
I uploaded the white paper for this gearbox today. Detail drawings for the shift mechanism are included. The parts can all be made on a maual lathe and mill although having digital readouts is recommended.
I appreciate any feedback.
Andy