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Seattle RC Racers/Hangar 30

Old 09-11-2022, 12:54 PM
  #19396  
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Originally Posted by Lence View Post
On this class does it matter what 25.5 motor I buy?

USGT: 1/10th scale electric chassis. 5mm minimum ride height. Motors: Tamiya 540 silver can; outdoors at Seatac R/C Raceway–ROAR-approved 21.5 brushless, OEM rotors only ; indoors at Hangar 30–ROAR-approved 25.5 brushless, OEM rotors only. ROAR-approved non-timing ESC for brushless motors. Tires for all venues: Gravity RC USGT pre-mount. Current allowed bodies here: USGT rules ROAR-approved 7.4V 2S lithium technology batteries. 4WD: 1350g minimum weight. FWD: No minimum weight; hatchback bodies only. Scale livery for all cars is encouraged. Racers are encouraged to operate both within the letter and spirit of the rules.
the slot machine from trinity seems to be a good one
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Old 09-11-2022, 04:05 PM
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Originally Posted by skypilot View Post
here i'll rephase it,

is the spur/pinion size that important as long as it ends up 1.8 final
Good question : depend on if the tech person or H30 want to do the math .(calculation)

Last edited by OVA; 09-11-2022 at 04:17 PM.
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Old 09-11-2022, 08:42 PM
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Originally Posted by skypilot View Post
here i'll rephase it,

is the spur/pinion size that important as long as it ends up 1.8 final
Hey Ritchie,

It's the final that matters.

You know how this goes though, if there is reason to doubt, someone will eventually grouse about it. That said, I'm not inclined to be held hostage by someone's mental or emotional limitations.

You are an experienced racer and I take you to be a fair minded competitor. We can put it in your hands to show up with a combo that hits the spec.

If someone has a bitch they can take it up with me at the track.
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Old 09-12-2022, 08:37 AM
  #19399  
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Yep, if ya can hit 1.80...who cares. I can see someone complaining if someone shows up with 1.81, which for anyone who knows this motor knows it won't mean a damn thing. But in the spirit of rules...1.80 is the gearing. Hit it, you good.

There were a lot of unknowns speccing a specific spur and pinion. We were trying to follow what some of the big races had done...but I knew in the back of my mind that there would be some obscure car, or a total lack of parts availability and we'd be meeting this conversation all over again.

1.80 is good....which may be the Seahawks scoring average at the end of the season...go Hawks?!?!?
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Old 09-13-2022, 11:28 AM
  #19400  
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Originally Posted by OVA View Post
no
any 25.5 Roar approved ,must be OEM rotor only
I think for now I will take my changes with TC 21.5, hopefully this class will come back to life this year. Plus hitting the wall harder is always better.
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Old 09-13-2022, 06:07 PM
  #19401  
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Originally Posted by OVA View Post
Good question : depend on if the tech person or H30 want to do the math .(calculation)
The what? The Hangar has a tech person?
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Old 09-13-2022, 11:35 PM
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Originally Posted by OVA View Post
Good question : depend on if the tech person or H30 want to do the math .(calculation)
Anyone who can’t follow a simple rule for a Wednesday night club race is a special kind of island-worthy. Pretty cut and dry. 1.8. Done.
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Old 09-14-2022, 10:21 AM
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Originally Posted by cementsurfer86 View Post
Anyone who can’t follow a simple rule for a Wednesday night club race is a special kind of island-worthy. Pretty cut and dry. 1.8. Done.
I mean, it's really not that hard to figure out. Here's a cheat sheet for all those "concerned"

Spur / Pinion
45 / 25
54 / 30
63 / 35
72 / 40
81 / 45
90 / 50

See the pattern?

For those more mathmatically minded....
Is the spur divisible by 9?
Is the pinion divisible by 5?
Is the pinion slightly more than half the value of the spur?

If all 3 are a go...their gear ratio is a go....

And as an added note...everyone at that group of tables is a special kind of worthy...ALL OF YOU...counting to 4 to ensure all the tires are on the car is an accomplishment....I'm waiting for the day someone forgets to put their body clips on...
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Last edited by Carnage9270; 09-14-2022 at 10:51 AM.
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Old 09-14-2022, 06:45 PM
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Originally Posted by Carnage9270 View Post
Yep, if ya can hit 1.80...who cares. I can see someone complaining if someone shows up with 1.81, which for anyone who knows this motor knows it won't mean a damn thing. But in the spirit of rules...1.80 is the gearing. Hit it, you good.

There were a lot of unknowns speccing a specific spur and pinion. We were trying to follow what some of the big races had done...but I knew in the back of my mind that there would be some obscure car, or a total lack of parts availability and we'd be meeting this conversation all over again.

1.80 is good....which may be the Seahawks scoring average at the end of the season...go Hawks?!?!?
Nice, I popped in here to ask exactly this question. Looks like I can get a 76T spur as the smallest for my gear diff. So with 76/42 that puts out a 1.809 ratio. I'm good or nah?
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Old 09-15-2022, 10:20 AM
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Originally Posted by peter_robinson View Post
Nice, I popped in here to ask exactly this question. Looks like I can get a 76T spur as the smallest for my gear diff. So with 76/42 that puts out a 1.809 ratio. I'm good or nah?
Hi Pete,

Since we're talking FDR, yes, you are good to go.

So, to be really clear, the minimum FDR is 1.80000...

1.799999... is a no-go. I'm not going to argue. Just drop a tooth.

Divide spur teeth by pinion teeth. Minimum 1.8000....infinity.

The tire diameter is fixed, so we don't need to do mess with rollouts and all the fancy pi stuff.

Sidebar confession: After many years, my mind goes to rollout when thinking pan cars. My first limbic response was, "No way!" But then my frontal lobe engaged and slowed the roll: "Hey genius, it's FDR not rollout, and that rollout would be way to small, even if it is in inches." You're good, Pete.
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Old 09-15-2022, 02:15 PM
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Did I miss if the club has GT12 tires for sale?
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Old 09-15-2022, 06:32 PM
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Originally Posted by arn671 View Post
Did I miss if the club has GT12 tires for sale?
H30 don’t sell them
most of us get them online
just maybe
Somebody may have an extra set for sell
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Old 09-20-2022, 07:15 PM
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thanks
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Old 09-21-2022, 03:35 AM
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Do MRT transponders work with the clubs lap counting software? Thanks
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Old 09-21-2022, 11:37 AM
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Originally Posted by Fred Sanford View Post
Do MRT transponders work with the clubs lap counting software? Thanks
They did last year
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