shadow_rusty Posted January 16, 2018 Report Share Posted January 16, 2018 (edited) Hi all, As you may have seen, I've been updating a few of my spreadsheets to be online... Here is a new one that I have created to assist with gearing choices. And yes, if you are an ex RC veteran like myself, this will be very familiar, especially if you ran 1/12 scale. Online SlotCar Rollout Chart Generator Note: Rollout is how far the car will travel for 1 rotation of the motor. Note2: Higher torque motors generally prefer a larger rollout. Note3: Higher RPM motors usually prefer a smaller rollout. Note4: Larger tracks in most cases prefer a larger rollout. Note5: Higher Voltage probably requires a lower rollout. Edited January 16, 2018 by shadow_rusty Quote Stolen from SlotsNZ Team ABC Team Leader (Ambitious, But Crap) Home Track Threads - Shadow's Semi-Permanent Layout & Another Rug Racer & Proud of It & Gymkhana Test Track Car Collection Thread - My Car Collection Charts / Diagrams - MJK Tyre Selector / Slot.it 4wd Gearing / PoliCar Rollout / Rollout Chart Generator / SCX 4wd Rollout / Track Wiring with Brake on Track Call Link to comment Share on other sites More sharing options...
Slo Posted January 16, 2018 Report Share Posted January 16, 2018 Great spreadsheet Shadow, quick reference and comparison! Just multiply rollout distance by any of the vast different motor RPM options available and you have the (potential) distance per minute. Could RPM be added to the spreadsheet? Quote Link to comment Share on other sites More sharing options...
munter Posted January 16, 2018 Report Share Posted January 16, 2018 I am not sure how I am meant to use that information. Any instructions you care to give? Quote John Warren Slotcars are my preferred reality Link to comment Share on other sites More sharing options...
shadow_rusty Posted January 16, 2018 Author Report Share Posted January 16, 2018 The best instructions I can give are... 1. You have a car that is geared perfectly for a particular motor. Eg. 9/27@20mm = 20.94 2. You calculate it's rollout. 3. On another car, with the same motor type, but only 18mm tyres, 9/27 = 18.85, which will be too short. 4. So, we can then work out that to get close to 20.94, we would need 9/25 gearing which is 20.92. In theory, both cars should then perform exactly the same. In reality, it gets you in the ball park, and you can fine tune from there... 1 Quote Stolen from SlotsNZ Team ABC Team Leader (Ambitious, But Crap) Home Track Threads - Shadow's Semi-Permanent Layout & Another Rug Racer & Proud of It & Gymkhana Test Track Car Collection Thread - My Car Collection Charts / Diagrams - MJK Tyre Selector / Slot.it 4wd Gearing / PoliCar Rollout / Rollout Chart Generator / SCX 4wd Rollout / Track Wiring with Brake on Track Call Link to comment Share on other sites More sharing options...
shadow_rusty Posted January 16, 2018 Author Report Share Posted January 16, 2018 (edited) Great spreadsheet Shadow, quick reference and comparison! Just multiply rollout distance by any of the vast different motor RPM options available and you have the (potential) distance per minute. Could RPM be added to the spreadsheet? Thanks slo1quick. Whilst I could add rpm, I'm not sure what it would achieve. All the results would just be a factor of the rpm larger. Also, it would just be a theoretical number as no motor will have enough torque at full rpm to actually move the car at that speed... That said, if people want it, it's not hard to add... Edited January 16, 2018 by shadow_rusty Quote Stolen from SlotsNZ Team ABC Team Leader (Ambitious, But Crap) Home Track Threads - Shadow's Semi-Permanent Layout & Another Rug Racer & Proud of It & Gymkhana Test Track Car Collection Thread - My Car Collection Charts / Diagrams - MJK Tyre Selector / Slot.it 4wd Gearing / PoliCar Rollout / Rollout Chart Generator / SCX 4wd Rollout / Track Wiring with Brake on Track Call Link to comment Share on other sites More sharing options...
Slo Posted January 16, 2018 Report Share Posted January 16, 2018 Thanks Shadow The rollout chart is great, but.... Most of us relate to Kilometers Per Hour better rather than a broken down fraction of that. So need the RPM factor in order to get that figure. The theoretical factors are the same for all motors. Not taking into account ( and its not relevant as far as the rollout chart goes) coefficients amps and torque bring into the equation. Quote Link to comment Share on other sites More sharing options...
bov Posted January 16, 2018 Report Share Posted January 16, 2018 IMHO - a slot.it Orange / Piranha type motor needs a Rollout of about 21.75... a slot.it Red motor needs a Rollout of about 18.15 A Ninco NC-1 type motor needs a Rollout of about 23.5 So - using your tire diameter, you can now calculate what gear ratio will get you closest to that Rollout number..... Quote Cheers, Tony. There's only two questions: 1. What direction do you go 2. What's the Lap Record? Link to comment Share on other sites More sharing options...
dangermouse Posted January 16, 2018 Report Share Posted January 16, 2018 How does one determine - what is a the ideal roll out Bov How did you come to 23.5 for a NC1 How would I work out the ideal roll out for an NC5 for example? cheers David Quote Link to comment Share on other sites More sharing options...
shadow_rusty Posted January 16, 2018 Author Report Share Posted January 16, 2018 Trial and error David... And yes, ~24 is about where I start with NC1/BWA motors too. Slo1quick, I've added another tab for you, this time, in km/h... Interestingly, the values are not that different to the mm/revoloution version... Now, I don't believe that it will even come close to the 'km/h' values that are on a Tamiya speed checker, but if it helps you understand the numbers, then it's all good. Quote Stolen from SlotsNZ Team ABC Team Leader (Ambitious, But Crap) Home Track Threads - Shadow's Semi-Permanent Layout & Another Rug Racer & Proud of It & Gymkhana Test Track Car Collection Thread - My Car Collection Charts / Diagrams - MJK Tyre Selector / Slot.it 4wd Gearing / PoliCar Rollout / Rollout Chart Generator / SCX 4wd Rollout / Track Wiring with Brake on Track Call Link to comment Share on other sites More sharing options...
Slo Posted January 16, 2018 Report Share Posted January 16, 2018 Great stuff Shadow! Thanks! Quote Link to comment Share on other sites More sharing options...
shadow_rusty Posted January 16, 2018 Author Report Share Posted January 16, 2018 (edited) No worries... DM, here are my 'starting' values when setting up a new car... I haven't updated this list in a while, and it's only a guide. Also, the values were calculated for 11v - 12v on small - medium tracks. Motor, RPM, Target Rollout (+/- 0.25mm) FF-050 BWA 14k FF 14000 24mm Scaley '18k' (20k) 20000 20mm FC-130 Ninco NC-1, 13000, 24.5mm BWA 14k, 14000, 24mm H&R Jack Rabbit, 14000, 24mm SRP 16k, 16000, 23mm Pioneer 18k, 18000, 22mm Carrera E200, 18000, 22mm Scaley 18k, 18000, 21mm Fly 18k, 18000, 21mm Slotter 18k, 18000, 21mm, NSR Shark 20, 20000, ScaleAuto SC-08B, 20000, SRC x01, 20500, 20mm Slot.it Orange (Original), 21500, 20mm Team Slot TS-10 "Fire", 23000, 19mm Revell ??, 23000, 19mm Carrera E100, 23000, 19mm AutoArt 26k, 26000, 18mm Scaleauto SC-06 Red, 30000, FK-130 Ninco NC-8 (Thruster), 13000, 25mm Ninco NC-11 (One), 13000, 25mm Ninco NC-9 (Sparker), 16500, 23mm Ninco NC-12 (Evo), 16500, 23mm FK-180 Ninco NC-2 (Black), 14600, Ninco NC-2 (Red), 15000, 26mm Fly Truck 15k (Original), 15000, 26mm M/T Racing M/T - 5, 15200, Ninco NC-7, 15600, Ninco NC-5, 16500, 24.5mm Ninco NC-12, 19500, Spirit Lemans, 19500, 22mm Spirit SxXx, 20500, 20.5mm Slot.it Flat-6 Yellow, 20500, Team Slot TS-11 "Glory", 21500, MSC Lightning, 22000, FK-SCX SCX RK-44/91, 17000, 24mm RX-SCX SCX F1 / RX-41/42/81/82, 16400, 25mm SCX RX-81B/82B, 17500, SCX RX-41B/42B/44B, 18000, 22mm SCX Pro Turbo Plus, 19000, SCX RX-91B 4wd, 19100, 21mm SCX Pro 4wd, 19100, 21mm SCX Pro Double 4wd, 20000, SCX Pro Speed, 20000, 20mm Team Slot TS-4 "Inferno", 20000 Edited January 16, 2018 by shadow_rusty Quote Stolen from SlotsNZ Team ABC Team Leader (Ambitious, But Crap) Home Track Threads - Shadow's Semi-Permanent Layout & Another Rug Racer & Proud of It & Gymkhana Test Track Car Collection Thread - My Car Collection Charts / Diagrams - MJK Tyre Selector / Slot.it 4wd Gearing / PoliCar Rollout / Rollout Chart Generator / SCX 4wd Rollout / Track Wiring with Brake on Track Call Link to comment Share on other sites More sharing options...
dangermouse Posted January 17, 2018 Report Share Posted January 17, 2018 Thanks Looking at your table it helps explain how an NC1 car that I had mistakenly put an 11t pinion on instead of a 9t set the class lap record and had everyone saying you can't get an NC1 to go that fast Quote Link to comment Share on other sites More sharing options...
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