# Skateboarding: sources and verification log

Checked 3 Oct 2026 (IST). Every fact on the page comes from the source listed here or is standard physics worked on the page. Fees, entry charges, phone numbers and email addresses were deliberately **not reproduced**.

## 1. Physics (standard science, worked on the page)

| Item | Basis | Status |
|---|---|---|
| Coasting d = v²/(2 C<sub>rr</sub> g); C<sub>rr</sub> 0.01–0.02 | mechanics; C<sub>rr</sub> **illustrative** | recomputed (4 m/s, 0.02 → 41 m) |
| Lean angle tan φ = v²/(gr) | mechanics | recomputed (29°, 33°, 25°) |
| Ollie as a projectile: v = √(2gH), airtime 2v/g | mechanics, idealised | recomputed (30 cm → 2.43 m/s, 0.49 s, 1.98 m at 4 m/s) |
| Ramp v = √(2gh); g-load at the bottom of the transition 1 + 2h/r | energy and circular motion, no friction | recomputed (1.5 m, r 1.8 m → 19.5 km/h, 2.67 g, 1,570 N for 60 kg) |
| Fall deceleration = h / stopping distance (in g) | mechanics; stopping distances **illustrative** | 20 g / 5 g / 2 g |
| Wheel rpm = v/(πd) | geometry | 54 mm at 15 km/h → 1,474 rpm |
| How trucks steer, ollie technique, pumping, wheel hardness | general skateboarding knowledge | qualitative only |

## 2. Governing bodies and rules

| Item | URL | Status |
|---|---|---|
| World Skate: governing body for skateboarding and roller sports, recognised by the IOC | https://www.worldskate.org/skateboarding.html | loaded |
| World Skate Academy: coach/skate-instructor courses and judge/referee courses (online and on site); only Academy judges and referees get an international licence; refresher courses | https://www.worldskate.org/about/world-skate-academy.html | loaded |
| RSFI: "the governing body for skateboarding and roller sports in India"; skateboarding page with rulebook 2022, annexures (w.e.f. 1 Apr 2023), rulebook 2018; 3-member Indian team at the 2019 Park Skateboarding World Championship (not used) | https://indiaskate.com/skateboarding/ | loaded |
| RSFI Skateboarding Rulebook 2022 (World Skate rules): Olympic disciplines street and park; no age limits; park helmets for all ages, street helmets under 18, in practice and competition; concussion protocol; park best of 2 (up to 4) runs of 30–50 s, five judges 0–100, drop high and low, average the other three to two decimals; Olympic street format 2 × 45 s runs + 5 single tricks, best run + 2 best tricks | https://indiaskate.com/wp-content/uploads/2024/02/10-SKATEBOARDING-RULEBOOK-2022-compressed.pdf | PDF downloaded and read with pdftotext |
| RSFI Skater Annual Registration 2026–27 | https://indiaskate.com/registered-skaters-2026-27/ | HTTP 200; RSFI home page states registration is mandatory (as checked for the skating page) |
| 64th National Roller Skating Championships, 5–15 Dec 2026, Karnataka, hosted by KRSA; technical-officials letter covers inline freestyle, skateboarding and roller derby | https://indiaskate.com/64th-national-roller-skating-championships-2026-technical-officials-letters-2/ | loaded |
| RSFI Karnataka unit page | https://indiaskate.com/karnataka/ | loaded |

## 3. Places

| Item | URL | Status |
|---|---|---|
| Janwaar Castle: skatepark in Janwaar, a remote village in Madhya Pradesh; "In 2015, a skatepark arrived"; rules "No school, no skateboarding" and "Girls first"; Asha Gond became national skateboarding champion and runs the community organisation | https://ulrikereinhard.com/blog/2026/07/04/what-janwaar-learned-what-telc-can-use/ | loaded (founder's blog, July 2026) |
| Janwaar Castle: construction from December 2014 by 12 skateboarders from seven countries with locals; Barefoot Skateboarders Organisation (youth non-profit) runs skateboarding sessions, community centre, school and homestays | https://ulrikereinhard.com/blog/2023/02/08/janwaar-castle-empowerment-through-transculturation/ | loaded (founder's blog, 2023) |
| Lohia Park, Gomti Nagar, Lucknow: LDA open-air skate park; "skating zone is complete and ready for use"; designed for beginners and young skaters | https://timesofindia.indiatimes.com/city/lucknow/lohia-park-to-get-citys-1st-open-air-skating-zone/articleshow/129111676.cms | loaded (TOI, 6 Mar 2026). Entry terms **not reproduced** |
| Cave Skatepark (Holystoked, Bengaluru) demolished in January 2026 after the collective could not keep paying rent | https://www.newstrailindia.com/inner.php?id=29872 | loaded via WebFetch (Newstrail, 21 Apr 2026) — **not listed as a place**, mentioned as closed |
| Jawahar Bal Bhavan skatepark, Cubbon Park, Bengaluru: announced Jan 2026, expected Apr–May 2026 | News18 / The Hans India / Oneindia (Jan 2026) via search | **opening not confirmed**; mentioned only as a callout telling readers to check |

## 4. Not verified / left off

- **Skateboarding Federation of India**: no official site found; skateboardingfederationofindia.com didn't resolve. **Not listed.**
- **Janwaar Castle's own website** (janwaar-castle.org) is now a domain-for-sale page, so the page links the founder's blog instead.
- **Holystoked** website returns "Store unavailable" (HTTP 402); its Cave park has closed.
- **Other Bengaluru, Delhi and Pune parks** (Play Arena, Backyard, Sam Sk8s, GLC) appear only in map listings and reviews; playarena.in was blocked. **Not listed.**
- **Olympic event details** beyond what the rulebook says were not checked.