Pro Boat Blackjack 42 brushless 8S catamaran (PRB08043) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/pro-boat-blackjack-42-8s-prb08043/  (sheet CC BY 4.0)
Basis: Secondary source: RC Car Action (Horizon Hobby announcement), RC Visions (dealer), Horizon Hobby (copy of the maker's figures; the maker publishes none directly)
Catalog version: 2026-10-20

Overall (mm): length 1086, width 387, height 184.15
- The Blackjack 42 is Pro Boat's polycarbonate 42-inch 8S catamaran. The file is a 1086 × 387 × 184 mm envelope of the hull.
- Pro Boat (Horizon Hobby) numbers are quoted from Horizon's launch announcement as republished by RC Car Action / a dealer, because Horizon's own spec tab could not be read; treat as secondary.
- The motor designation differs between Horizon's spec table (4985) and description (4685).
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.
- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.

dimension  value
Length  42.75 in (1086 mm)
Beam  15.25 in (387 mm)
Hull height  7.25 in (184.15 mm)
Weight  8.95 lb (4.1 kg)
Propeller  2-blade, 1.7 × 1.6 in, 5 mm shaft
Drive  flex shaft
Motor  listed as 4985 1350 Kv brushless water-cooled (description says Spektrum Marine 4685)
ESC  Spektrum Smart 160A HV water-cooled
Battery  two 4S 5000 mAh 50C+ with IC5/EC5 (8S total)
Top speed  55 mph

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- RC Car Action (Horizon Hobby announcement): Pro Boat Blackjack 42 Brushless 8S Catamaran RTR — web — Publisher's page; dimensions are facts — https://www.rccaraction.com/?p=341929
- RC Visions (dealer): Pro Boat Blackjack 42 8S — web — Publisher's page; dimensions are facts — https://rcvisions.com/products/pro-boat-blackjack-42-8s-brushless-rtr-electric-catamaran-w-2-4ghz-radio-system
- Horizon Hobby: Blackjack 42 8S PRB08043 — web — Publisher's page; dimensions are facts — https://horizonhobby.com/product/blackjack-42-8s-brushless-catamaran-rtr/PRB08043.html

Free files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/pro-boat-blackjack-42-8s-prb08043/index.json
API: https://xemstudio.com/api/geometry?object=pro-boat-blackjack-42-8s-prb08043