VehiclesArrma Fury MEGA 550 2WD
Arrma Fury MEGA 550 2WD
1/10 scale · short course truck · ARA3221
- Final drive
- 13.64:1
- Tire
- 104mm
Specifications
Last modified
| Spec | Value | Basis |
|---|---|---|
| Drivetrain | ||
| Pinion | 14TStock | Stock |
| Spur | 61TStock | Stock |
| Transmission & axle | 3.13:1Derived | Derived |
| Spur ÷ pinion | 4.357:1Calculated | Calculated |
| Final drive | 13.64:1Stock | Stock |
| Wheels & tires | ||
| Tire diameter | 104mmStock | Stock |
| Rollout | 24.0mm per motor turnCalculated | Calculated |
| Power | ||
| Motor | Not applicable | |
| Motor shaft | Not published | |
| Battery | Up to 2SLiPoStock | Stock |
| Performance | ||
| Theoretical top speed | Not applicable | |
| Vehicle | ||
| Part number | ARA3221 | |
| Scale | 1/10 | |
| Class | Short course truck | |
Stock is as the vehicle ships. Calculated is worked from the stock figures on this page rather than stored beside them, so the two cannot drift apart. Derived is worked out from gear tooth counts the maker publishes rather than printed as a ratio; the notes below say how. Not applicable means the vehicle does not come with it, like the motor on a roller or the tires on a race kit, or does not have one, like a KV rating on a brushed motor. Not published means it exists but no source we could find prints it.
Gearing parts
| Component | Teeth | Pitch | Bore | Part number |
|---|---|---|---|---|
| Fitted at the factory | ||||
| Pinion | 14T | Mod 0.8 | 3.175 mm | ARA311076 (opens in a new tab) |
| Spur | 61T | Mod 0.8 | Not applicable | ARA311100 (opens in a new tab) |
Tooth counts are the ones in the specifications above. Pitch is given as metric module (Mod 1, Mod 0.8) or diametral pitch (32P, 48P). They are different standards and are not interchangeable, even where the numbers look close. Bore is the pinion’s hole, listed separately from the motor shaft. Linked part numbers go to the maker's or official distributor's page for that part.
How these numbers were settled
The brushed 2WD Fury short course truck with a MEGA 550 14T motor.
- Brushed, so there is no KV.
- The Spektrum 40A brushed 2-in-1 ESC and receiver is rated for 2S LiPo or 7-cell NiMH.
- Horizon prints no gearing for this SKU.
- The 14T pinion and 61T spur come from the standard-parts list.
- Horizon's standard-parts list names the 2WD gearbox: a 15T layshaft gear driving the 47T diff through a 29T idler, so the idler cancels and the transmission ratio is 47/15 = 3.13, the figure Horizon prints for the Quake 223S on the same gearbox.
- Final drive is 61/14 x 3.13 = 13.64.
- The standard-parts list names the dBoots Fortress SC tire (ARA550087), whose page prints an overall diameter of 4.1 in (104mm).
Documents
Sources
- ARA3221horizonhobby.com (opens in a new tab)
- searchhorizonhobby.com (opens in a new tab)
- ARA311095horizonhobby.com (opens in a new tab)
- ARA311201horizonhobby.com (opens in a new tab)
- ARA550087horizonhobby.com (opens in a new tab)
- ARA3537horizonhobby.com (opens in a new tab)
- ARA311076horizonhobby.com (opens in a new tab)
- interactive-exploded-viewhorizonhobby.com (opens in a new tab)
- ARA311100horizonhobby.com (opens in a new tab)
- ARA390307horizonhobby.com (opens in a new tab)
Every figure on this page traces to one of these. Where they disagreed, the note above says which was used and why.