Apollo

Articles, guides, and products tagged "Apollo" — a combined view of every catalogue resource on this topic.

User guide

Aerodynamics of an electric scooter as an engineering discipline: F_drag = ½·ρ·v²·CdA, decomposition into pressure/friction/induced/interference, Reynolds regimes (rider Re ≈ 10⁶, wheel Re ≈ 6×10⁴), CdA breakdown (rider 60-75% + frame 10-15% + wheels 5-10% + bag 0-15%), measurement methods (wind tunnel + coastdown ISO 10521 + power-meter Martin 1998), yaw-angle dependence Cy, why wheel aero on 8-10" differs from bike/moto, body-position tradeoffs vs stability, P_drag > P_roll crossover ≈ 19 km/h, fairings engineering and EU L1e, vehicle-class CdA table

Why a standing upright rider posture on an e-scooter is the worst CdA configuration among all personal vehicles (typical 0.55-0.70 m²), and why that means drag power begins to dominate rolling resistance from just 18-22 km/h — whereas a tucked motorcyclist only reaches that crossover at ~50 km/h. This article does not repeat the user-facing wind protocol from [Riding in windy weather](@/guide/riding-in-wind.md) and is not the same as the [energy-budget model](@/guide/real-world-range-energy-budget.md) — it is the **engineering foundation under both**: the formal drag equation F_drag = ½·ρ·v²·CdA with decomposition into pressure/friction/induced/interference, Reynolds regimes for the rider (L ≈ 1.7 m → Re ≈ 10⁶ at 25 km/h: turbulent boundary layer) and wheel (R ≈ 0.1 m → Re ≈ 6×10⁴: subcritical regime, drag crisis Re ≈ 3×10⁵ unreachable); CdA breakdown by component (rider 60-75% of frontal silhouette 0.4-0.55 m² + frame/deck 10-15% + wheels 5-10% + bag/cargo 0-15%), extrapolated from Crouch et al. 2017 J. Fluids and Structures 74:153-176 cycling aerodynamics state-of-the-art review and Bert Blocken et al. (TU/e + KU Leuven) bicycle-pose CFD studies; three measurement methods (wind tunnel low-speed automotive Eppler-section; coastdown ISO 10521-1:2015 + SAE J1263/J2263; power-meter regression Martin et al. 1998 J. Applied Biomechanics 14(3):276-291) with accuracy bands; yaw-angle dependence — Cy reaches 0.6-0.8 at 15-20° yaw, explaining catastrophic crosswind behaviour; wheel aerodynamics on small 8-10" wheels — why disc-vs-spoke difference is <2% drag (vs ~5% on 700c bike wheels) because of small frontal area; body-position tradeoffs — tucked posture possible but constrained by deck length and vibration absorption; power crossover P_drag > P_roll for CdA 0.55 + Crr 0.012 + m_total 105 kg at v ≈ 19 km/h (below it P_roll dominates, above it cubic P_drag dominates); fairings engineering — CdA reduction potential 25-40%, but crashworthiness penalty + EU L1e enclosure rules; vehicle-class CdA table for context (cyclist tucked 0.20-0.25; cyclist upright 0.45-0.55; e-scooter rider 0.55-0.70; motorcyclist tucked 0.30; auto 0.6-0.8). ENG-first sources (0 RU): Wilson «Bicycling Science» 4th ed. MIT Press 2020; Martin et al. 1998 J. Applied Biomechanics 14(3):276-291; Crouch et al. 2017 J. Fluids and Structures 74:153-176; Blocken et al. TU/e + KU Leuven cycling CFD; Hoerner «Fluid-Dynamic Drag» 1965; ISO 10521-1:2015; Anderson «Fundamentals of Aerodynamics» 6th ed. McGraw-Hill 2017; Schlichting & Gersten «Boundary-Layer Theory» 9th ed. Springer 2017; SAE J1263 and SAE J2263.

14 min read

User guide

Smooth acceleration and throttle control on an e-scooter: longitudinal weight-transfer physics, jerk-limited ramp, controller soft-start, slippery-surface launch, wheelie risk on a high-CoG deck, and throttle calibration

Acceleration is the longitudinal mirror of braking: the same weight-transfer, but with the sign flipped. Under a hard throttle opening, the motor torque at the rear wheel generates an equal reactive torque on the frame, which pitches the scooter nose-up; the rider's body inertia simultaneously moves rearward. The front wheel unloads — in the limit, it lifts off (wheelie); in the typical case, it loses lateral grip on a corner or a small bump. On an e-scooter, the throttle is not a 'gas pedal' in the traditional sense: between your finger and the stator winding sit a Hall sensor (0.84–4.2 V), a controller with PWM modulation and its own soft-start ramp, the BMS, and finally the motor with MOSFET switches. Each layer adds its own latency (5–50 ms), its own noise floor, and its own limit: an over-driven MOSFET → 150 °C cutoff, a displaced throttle magnet → ghost-throttle in the cold, an overly aggressive ramp in sport mode → a wheelie on a 30 % gradient. Jerk — the second derivative of velocity, m/s³ — has a medical comfort threshold for car passengers of ≈ 0.3–0.9 m/s³ ([ScienceDirect — Standards for passenger comfort in automated vehicles, 2022](https://www.sciencedirect.com/science/article/pii/S0003687022002046)), but on a high-CoG, short-wheelbase e-scooter, even 1.5 m/s³ means a sharp deck pitch and finger-strain on the throttle. CPSC counts 50 000 ED visits in 2022 alone, 94 % of which were solo-falls with no other vehicle involved ([CPSC — E-Scooter and E-Bike Injuries Soar, 2024](https://www.cpsc.gov/Newsroom/News-Releases/2024/E-Scooter-and-E-Bike-Injuries-Soar-2022-Injuries-Increased-Nearly-21)); among typical mechanisms — stuck throttle (Apollo recall 2025) and uncontrolled acceleration on a slippery surface. This is a drill-oriented guide: physics, weight redistribution, jerk-limited ramp, soft-start vs sport mode, slippery launch, wheelie risk, ghost-throttle troubleshooting, a daily launch protocol with a 2–3 mph kick-start, and a 30-min weekly drill in an empty lot. ENG-first sources: MSF Basic RiderCourse, Wikipedia (Jerk physics, Wheelie, Weight transfer, Bicycle-and-motorcycle dynamics), Inside Motorcycles / Data for Motorcycles on the friction circle, Lime / Bird operator manuals, NAVEE on TCS, Apollo, GOTRAX, Levy Electric throttle guides, marsantsx on controller thermals, CPSC injury data.

13 min read

User guide

Carrying cargo and payload on an e-scooter: backpack vs panniers vs handlebar bag vs frame bag vs deck-mounted, max-payload engineering, weight distribution and effects on stopping distance / range / CoG / stability / tire pressure / motor thermal load

Carrying cargo on an e-scooter is not «just throw on a backpack» — it is a separate engineering discipline in which every extra 5 kg changes five parameters at once: stopping distance (through disc heating and pad fade), CoG height (the difference between a backpack at the shoulders +1.4 m above the deck and a load on the deck itself +0.2 m is up to ±0.1 m of composite-CoG shift, which changes the tip-over threshold and the wheelie limit), tire footprint and optimal pressure (ETRTO targets 15 % tire drop, ΔP ≈ 0.5 psi per +5 kg), range (every 9 kg of additional mass eats 5–10 % of range on flat ground and 10–20 % on uphill per Ride1Up and EBIKE Delight data), motor thermal load (power splits between traction force and gravity on grade, MOSFET overheating scales with the square of current). Manufacturer max-loads range from 100 kg (Segway Ninebot ES4) through 130 kg (Segway MAX G3) and 150 kg (Apollo Pro, Segway GT3) to 180 kg (Kaabo Wolf King GTR) — and that is total deck load, meaning `m_rider + m_apparat (not counted if you hold it) + m_cargo` must remain within a 15 % margin of spec due to frame fatigue, brake-component wear and folding-mechanism stress. The five most common carrier formats — backpack, panniers, handlebar bag, frame bag, deck-mounted — rate differently across five metrics (CoG-impact, steering-impact, fold-impact, capacity, accessibility). This guide is drill-oriented: composite-CoG physics, weight-redistribution formulas, a 7-step securing protocol and an 8-point pre-ride checklist. ENG-first sources: eridehero / Unagi / Levy / NAVEE manufacturer specs, XNITO load-weight-and-braking analysis, Rene Herse / SILCA tire-pressure (Frank Berto 15 % drop standard, ETRTO 20 % deflection), arXiv 1902.03661 tire-deformation paper, Ride1Up / EBIKE Delight / QuietKat range formulas, RegenCargoBikes / Academia.edu cargo-bike CoG physics, Letrigo / ADVMoto / Bike Forums cargo-securing best practices.

14 min read

User guide

Hot-Weather Operation of an Electric Scooter: +30 °C as the Battery Limit, Brake Fade, Hot Asphalt, IP in a Summer Downpour, Rider Heat Stress

Mirror of the winter-operation guide, only the opposite end of the scale. Four independent scooter subsystems hold the summer temperature budget, and each fails at its own threshold: (1) Li-ion chemistry — calendar aging accelerates exponentially above 30 °C, Battery University BU-808 records up to 35 % capacity loss per year at 40 °C + full SoC; BU-410 and OEM BMS block charging above 45–50 °C; Xiaomi 4 Pro warns at >45 °C, Segway-Ninebot trips a warning at battery ≥55 °C; (2) brakes — organic pads begin to fade at 150–200 °C, glaze from 300–400 °F (≈150–200 °C), rotors warp at 250–300 °C; (3) tyres and hot asphalt — pavement reaches +60–70 °C while air is +35 °C (ScienceDirect, UGA Extension), tyre pressure rises ≈1 psi per 10 °F (Tire Rack); (4) IP protection — IP54/IP66/IP67 are lab-certified, not against UV aging of gaskets plus a summer downpour; FDNY/FSRI 2024–2025: NYC 18 deaths in 2023, 6 in 2024 (NFPA Journal); (5) rider — CDC NIOSH: heat stroke can raise core temperature to 41 °C in 10–15 min, heat exhaustion + dehydration are silent risks; (6) thermal runaway — FSRI experiment: an e-bike engulfs a room in <20 s.

14 min read

User guide

Roadside Tire Repair: Fixing Flats, Tube Replacement, Field Prevention

Field repair of an e-scooter pneumatic tire: how tubed vs tubeless behaves at the moment of puncture, how to recognise pressure loss (slow deflate ≈8–24 h vs instant blow-out), what belongs in the repair kit (tire levers, mini-pump or 16 g CO₂ cartridges, Park Tool GP-2 pre-glued patches, nitrile gloves, 4/5/6 mm hex), preventive sealant (Slime: up to 1/4″ ≈6 mm punctures, ~2-year service life; Stan's NoTubes Original: ≤6.5 mm sealed almost instantly, 2–7 months liquid life), tubeless mushroom-plug repair (rasp → plug → inflate), full tube replacement for hub-motor wheels (disconnect motor cable before axle removal, pinch flat / snake-bite risk under tire-lever pressure, inside-the-casing inspection for residual sharps), hub-motor specifics (15–20 kg pull-out force on the connector, document spacer and washer order before disassembly), when to give up and visit service (>1/4″ hole, sidewall cuts, damaged valve stem, bead-seating failure), prevention (45–50 psi on Xiaomi M365/Pro, weight-scaled 35–40 psi front / 40–50 psi rear at 50–70 kg, recheck every 2–3 weeks). Sources: Apollo support, Slime / Stan's NoTubes official guides, Levy Electric / Schwinn rear-wheel removal, Jobst Brandt snakebite analysis, Xiaomi M365 user manual.

13 min read

User guide

Transporting your e-scooter: car, train, plane — watt-hour limits and carrier rules

How to transport an e-scooter in the trunk of a car (wheel orientation, tie-down, Li-ion storage temperature window), on trains in different countries (Amtrak ≤22.7 kg + tire ≤2″ + UL certification, Deutsche Bahn folded → 700×500×300 mm as hand baggage, TfL and Network Rail UK with a blanket ban on e-scooters since 2025, Eurostar ban with a children's kick-scooter exception ≤85 cm), and on aircraft (IATA DGR / FAA PackSafe / UK CAA: ≤100 Wh — carry-on, 100–160 Wh — only with airline approval and max 2 spare, >160 Wh — forbidden on passenger flights, which automatically rules out almost every consumer model: Xiaomi M365 280 Wh, Mi 4 Pro 446 Wh, Apollo City 624 Wh, Apollo Phantom ~1217 Wh, NAMI Burn-E 2 Max 2304 Wh, Dualtron Thunder >2500 Wh). Concrete policies of Delta, United, Southwest, JetBlue, American, Air Canada, WestJet — all ban recreational lithium-powered rideables. Why: FAA SAFO 10017 / SAFO 25002 on thermal runaway, IATA 30 % SoC recommendation 2025 → mandatory 2026, mandatory 49 CFR 173.185 and UN 38.3 for shipment.

13 min read

Electric scooter components

Display, throttle and error codes: how to read your dashboard and what the errors mean on popular decks

How the e-scooter user interface works: display types (Xiaomi M365 / M365 Pro LCD, Ninebot Max G30 LCD, EY3 on Dualtron / Kaabo / Currus, Apollo TFT, Inmotion), the three throttle types (trigger, thumb, twist), cruise control (activation condition, how to disable, safety limits), error-code tables for Xiaomi (10–40 with long/short blink encoding), Ninebot Max G30 (10–27), Apollo (E1–E7), EY3 (1–6), Inmotion (E01–E16) with causes and actions.

13 min read

User guide

Battery Charging Rules and Care: 20–80 % Window, BMS Temperature, Smart Chargers, Where and How to Charge

Why charging is one of the two biggest sources of e-scooter problems (alongside crashes): dendrites below 0 °C permanently destroy capacity (Battery University BU-410), full charging keeps a pack to only 80 % of its life vs 200 % with a 25–80 % window (BU-808), storage at 100 % SoC at room temperature gives ~80 % after a year vs ~96 % at 40 % SoC (BU-702). FDNY 2024 records 277 fires and 6 deaths in New York (67 % drop in fatalities after NYC Local Law 39 requiring UL 2271/2272/2849). Specific figures from Xiaomi 6 Max (5–40 °C charging) and 6 Ultra (8–40 °C), Segway-Ninebot (Max G30: 'over 50 °F / 10 °C'), Apollo Charging Best Practices (20–80 % daily, 50–70 % storage, top-up every 1–2 months), smart chargers with 80 / 90 / 100 % cutoff (Apollo / NAMI / Dualtron / Fluid FreeRide), five steps UK OPSS, FDNY protocol 'not in bedroom, not on couch, not near exits'.

13 min read

User guide

Winter Operation of an Electric Scooter: 0 °C as the Engineering Boundary, Range −30…−50 %, Traction on Ice, Salt and Condensation

Why winter is not a cosmetic inconvenience but a simultaneous stress test of four independent scooter subsystems: (1) Li-ion chemistry below 0 °C (BMS blocks charging — Battery University BU-410, Xiaomi 6 Ultra: charging 8–40 °C; Segway-Ninebot: with battery <0 °C the vehicle 'cannot accelerate normally and may not be charged'); (2) real-world range drops 25–50 % (Apollo: ~25 % of normal at freezing; AAA EV: 41 % at −6.7 °C with heating; NMC vs LFP difference — NMC ~70–80 % at −20 °C, LFP down to −40 %); (3) traction on ice and snow — pneumatic studded vs bare rubber; recommended pressure 10–15 % below rated; Apollo winter tire set; Nordic jurisdictions' studded tyre windows (Norway: 1 November – first Sunday after Easter; Nordland/Troms/Finnmark — 16 October – 30 April; Oslo/Trondheim — charge for entering with studs); (4) salt, condensation and IP — no IP56/IP66 is certified for road salt; Apollo: 'do not ride in icy, snowy, or salty conditions'; FDNY 2024: 277 fires, 6 deaths.

14 min read

Electric scooter components

Electric scooter frame, handlebar and folding mechanism: materials, fold types, known failures

How the structural components of an electric scooter are built: frame (6061-T6 / 7075 / 6082 aluminium, magnesium alloy, steel, carbon fibre), stem column, handlebar and grips (400–610 mm width, 22.2 mm grip diameter), folding mechanism types (lever-latch, multi-point hinge, twist-and-fold, push-button trigger-pin), known failure modes (Xiaomi M365 2019 recall, Lime/Okai sharing deck cracks, M365 stem-hook wear), and regulatory requirements (EN 17128:2020, ASTM F2641).

10 min read

Types of electric scooters

Off-road electric scooters: a separate class with 8–11 kW, hydraulic suspension and its own legal reality

Profile of the off-road / hyperscooter class of electric scooters: dual-motor 5–11 kW layouts on 72 V Li-ion 21700, hydraulic suspension (KKE, Logan), 4-piston hydraulic brakes, 10–11″ tires, 45–55 kg mass. Legal status: private land only in the UK, outside eKFV in Germany, outside PLET in Ukraine. Reference examples: Dualtron Thunder 3, NAMI Burn-E 2, Kaabo Wolf King GT Pro, Apollo Phantom, Weped SST/GTR. Injury data from JAMA Network Open 2024 and CPSC 2017–2024.

13 min read