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Frame size vs prop size

What frame size do I need for 3, 5 or 7 inch props? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: frame size prop size, drone frame size chart, what size props for 220mm frame, 5 inch frame size, wheelbase vs prop, fpv frame sizes, 250 class quad props, 7 inch frame size, quad frame diagonal

Exact dimensions. True size, with no printing tolerance added.

sizes
13 in table

Notes

  • 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.

Frame size vs prop size size chart

parametervalue or rangesource
65-75 mmwhoopsGrepow
90-120 mm2 inGrepow
120-150 mm3 inGrepow
160-200 mm4 inGrepow
210-250 mm5 inGrepow
250-330 mm6 inGrepow
280-330 mm7 inGrepow
330-380 mm8 inGrepow
355-405 mm9 inGrepow
405-455 mm10 inGrepow
Prop tip clearance~0.5 inArduPilot
3 in diagonal (other source)85-100 mmUnmanned Tech Shop
5 in (other source)210-220 mmUnmanned Tech Shop

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

GrepowWhat size FPV drone should I get?webPublisher's page; dimensions are facts
ArduPilotArchived: Advanced MultiCopter DesignwebPublisher's page; dimensions are facts
Unmanned Tech ShopFPV drone propeller size guide: how to choose propswebPublisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

frame-size-prop-size-layouttrue x frame layout: 220 mm motor-to-motor diagonal, 5 in props (discs show the swept area; arms and plate illustrative)STEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=frame-size-prop-size

Frame size vs prop size, isometric render of a generated part
Render of frame-size-prop-size-layout from the free STEP; not to scale.

Fits with

Questions

What is 'wheelbase'?

Diagonal motor-to-motor distance (Grepow).