Just curious, what did everyone think of the Chiaphua (AKA Atwood Mobile, Chalupa [sorry, team joke]) motor this year, Good or Bad?
I thought they were great… We had to drop them from our drive due to weight (they are hefty), but I still love to just hook them up to a battery and enjoy trying to hold onto them when they torque. They have some serious potential, much better then the van door motors
The one quibble is probably that funky gear on the shaft and the cluster… If only every motor were as easy as the drill motor…
-Andy A.
i loved those motors. gave us huge speed and power. heck, teamed up with the drill motors, we were almost unstoppable (yes, almost :(). if they don’t have them next year, i would be saddened, because those motors rock.
*Originally posted by Ian W. *
**i loved those motors. gave us huge speed and power. heck, teamed up with the drill motors, we were almost unstoppable (yes, almost :(). if they don’t have them next year, i would be saddened, because those motors rock. **
Yes you are right…but what if you went one step foward and added Fisher Price Motors to the assembly?
Chalupas are god!!!
Thats quite impressive. Is the window motor for changing gears?
and how did you overcome the problem of popping breakers…espcially with treads.??
Chris
151
Chris,
Yes,
The window lift motor was for shifting. We used it for our regionals. Then we switched to a non-pnuematic pump shifting system. All we did was fill up the accumulators before each match and they would enable us to shift more than we needed to for a certain amount of shifts…
Actually in the very beggining we did pop breakers because we were way too fast…then we geared down, and still had some problems under tuff pulling matches…So we figured out how to cool down the circut breaker with that “cold spray” stuff and that seemed to help a lot…
I dont have any photos of it yet, but i have this CAD pic…
http://www.theforumisdown.com/uploadfiles/060602/tkf02m16a_asm_pneu.JPG
{edit} Copy and paste that URL
That shifter was designed before nats, but it was built and mounted in a little over 2 hours on the Thursday of Nats
Interesting design. Care to explain any of it?
Jeff,
I’m working on a white paper which describes this design in detail (prints and all)… it should be done by Aug. 1st.
Actually, this design is alot like your team’s gear shifting desgin. The way our gears engage and disengage is a bit different, and they were able to do this on the fly, but the overall concept is the same. We eventually got smart and actuated the shifter mechanism via pneumatics as DJ and Clark mentioned above.
Andy B.
Cool beans. I’ll be eagerly awaiting your white paper. I’m interested to see how this drive of your works.
*Originally posted by Andy Baker *
**
I’m working on a white paper which describes this design in detail (prints and all)… it should be done by Aug. 1st.Actually, this design is alot like your team’s gear shifting desgin. The way our gears engage and disengage is a bit different, and they were able to do this on the fly, but the overall concept is the same. We eventually got smart and actuated the shifter mechanism via pneumatics as DJ and Clark mentioned above.
Andy B. **
I am anxiously awaiting your white paper, and also seeing the machine in person. I really want to see how you did the shift on the fly. We’ve trashed entirely too many Bosch trannys. :(Fortunately none in competition.
At least we’ve gotten pretty good at rebuilding them.:rolleyes:
ChrisH
Would the “bad” voter care to explain why they did so? I’m not harassing you about this or anything, but I’d be interested to know why you don’t like the Chiaphuas.
It wasnt me that voted for that, but i think i can see where the person is coming from…
If u dont have the resources to build something really “mechanical” to use these motors (gearboxes, etc.) then it stretches the “unfairness” (is that a good word?) of the competition in some sense…
Back to the gearbox.
Here are some more pics (sorry you’ve gotta copy and paste the url the once “really cool” place i used to upload this pictures to has banned places like this from viewing the pictures)
http://www.theforumisdown.com/uploadfiles/060602/tranny.JPG
http://www.theforumisdown.com/uploadfiles/060602/DSCF0559.JPG
I may go over to our shop sometime soon so i can finally get some pictures of the pneumatic shifting.
They don’t have as much power as the Drill Motors as FIRST has given us in the last couple of years.
we didn’t use the chiaphua motors, we used 2 drill motors and 2 fisher price motors for our drive system.
*Originally posted by Team522 Captain *
**They don’t have as much power as the Drill Motors as FIRST has given us in the last couple of years. **
I suppose you voted “Bad” althought it is 2:35 am on sunday morning and im not totally awake
I suppose you voted “Bad” althought it is 2:35 am on sunday morning and im not totally awake
I voted Bad. I wouldve voted a different answer but there were only 2 “YES and NO”.
For the 8 - Wheel Drive train my team used this year on “Dorothy” the Chipaqua’s would’ve been useless. WE chose the Drill’s because they were a much stronger motor. The Drill Motors were tested about 3500 RPM’s compared to the “Chulapas” where they were tested about 1500 RPM’s. Our team ddin’t find much use in using them. The “Big Motors” or Chulapas still currently sit in the Kit of Parts Box. Next Year however we are developing an improved Drive Train so that we don’t have to use the Drill’s. Which motors would have I chosen this year: Drill / Fisher Price / Chalupas I would go along with Drills:
A: there lighter then the Chulapa
B: There Stronger
C: They have a clutch which sometimes when not broken prevents the other teams from pushing us around all that mcuh.
The bad point. They wear out two quickly. The chulapas are long lasting but the Drills prove to be stronger. Maybe next year our team will move onto a stronger motor if FIRST gives us any but until then we will stick to The drills for Strength.
“YES and NO”.
I meant to say “GOOD or BAD”
*Originally posted by Team522 Captain *The Drill Motors were tested about 3500 RPM’s compared to the “Chulapas” where they were tested about 1500 RPM’s.
Are you sure about this cause it does not sound right. THe chips are rated for 145 oz-in at max efficency and 321 at max power and 208 at normal load.
The drill is between 200 and 500 mN-M 5000-10000rpm and through the gearbox becomes 225 ft-lbs at 400 rpm.
Now if someone could give me the conversions forft-lbs mN-m and oz-in i could figure it out for sure but i think when i tried it i found that the chips were 2-3 times more powerful than the drill.