Frame size vs prop size — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/frame-size-prop-size/ (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/) Basis: Design rules and figures from the cited sources; example geometry by Xem Studio Catalog version: 2026-10-20 Sizes: see table below - Frame size is the diagonal motor-to-motor distance; it caps prop diameter because props need tip clearance (Grepow; ArduPilot). Grepow maps 210-250 mm to 5 in props. - ArduPilot suggests about half an inch of clearance tip-to-tip and to the frame; overlapping tips hurt efficiency and cause vibration. - The file is a reference example built by Xem Studio from the numbers above (Reference 5-inch build: 220 mm diagonal within Grepow's 210-250 mm class for 5 in props.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle. parameter value or range source 65-75 mm whoops Grepow 90-120 mm 2 in Grepow 120-150 mm 3 in Grepow 160-200 mm 4 in Grepow 210-250 mm 5 in Grepow 250-330 mm 6 in Grepow 280-330 mm 7 in Grepow 330-380 mm 8 in Grepow 355-405 mm 9 in Grepow 405-455 mm 10 in Grepow Prop tip clearance ~0.5 in ArduPilot 3 in diagonal (other source) 85-100 mm Unmanned Tech Shop 5 in (other source) 210-220 mm Unmanned Tech Shop Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Grepow: What size FPV drone should I get? — web — Publisher's page; dimensions are facts — https://grepow.com/blog/what-size-fpv-drone-should-i-get.html - ArduPilot: Archived: Advanced MultiCopter Design — web — Publisher's page; dimensions are facts — https://ardupilot.org/copter/docs/advanced-multicopter-design.html - Unmanned Tech Shop: FPV drone propeller size guide: how to choose props — web — Publisher's page; dimensions are facts — https://www.unmannedtechshop.co.uk/de/blogs/knowledge-base/fpv-drone-propeller-size-guide-how-to-choose Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/frame-size-prop-size/index.json API: https://xemstudio.com/api/geometry?object=frame-size-prop-size