Prop Control Knob — FAR 23.781 Compliant (Ergonomic)

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Prop Control Knob — FAR 23.781 Compliant (Ergonomic)

$26.95

A FAR 23.781-style prop knob that’s easier to grab and easier to find by feel. Lightweight, coated for durability, and designed to drop onto compatible CT-series quadrant levers. A small change that makes prop tweaks feel more deliberate.

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Made by a pilot for pilots, the FAR 23.781 PROP Control Knob is manufactured in the USA by Swearingen 3D works of Marion IA., packaged in the USA and distributed by the designer.

The PROP control knob consists of a 1.1 in, 3D printed PROP knob, scaled around FAR 23.781 guidance and Piper engineering plans. The PROP knob has been made to be compatible with the VANs RV-3, -4, and -8 /8A throttle quadrants CT-42F, CT-43F and CT- 82F, 83F and 81R (as pictured). The PROP knob has been sized to adequately clear the Throttle Grips sold on this site.

This is a PROP control knob that provides a remove and replace option to your CT series of VANs throttle quadrants. (RV-4 CT-43F Throttle quadrant shown in pictures, not included in sale).

FEATURES

  • PROP Knob Size 1.2 in. width

  • Compatible with 0.61 Inch width throttle quadrant levers. Attaching T-4 hardware included.

  • Weight: 7 gm..

  • The PROP knob is made from tough ecologically friendly, 3D printer BLUE PLA, coated in clear urethane.

  • PROP knob is compatible with all RV-3, RV-4 Throttle Grips sold on this site..

  • Condition: Mint, ready to plug and play. 

  • Terms and Conditions approval required prior to purchase

  • Non-Smoker Manufacturing Facility

    Shown within the pictures is the PROP control knob installed on the VANs RV-4 CT-43F three lever throttle quadrant. This sale is for the PROP knob only and is not sold with the throttle quadrant or MIXTURE control knob..

If you have any questions about this product, please ask.

Pilot-built throttle grips, cockpit controls, and control wheel emblems for Experimental and classic aircraft

If you fly an RV (or any Experimental), you already know: the cockpit should feel natural, not fussy. I design and build throttle grips, knobs, smoke-system controls, and control wheel emblems that make the cockpit feel intentional—so you can fly the airplane instead of hunting for switches.

Designed, printed, assembled, and tested in Marion, Iowa.

Shop Throttles • Shop Control Knobs • Shop Control Wheel Emblems • Shop Smoke Controls • Shop Tools

What I make

Throttle grips

Throttle grips built around real cockpit tasks: PTT, Smoke, TO/GA, COMMS/ICS, Flaps, and more—laid out to reduce fumbling and keep your hand where it belongs.

Control knobs

FAR 23.781-style Prop / Mixture / Trim / Alt Air knobs and matched sets that make controls easy to identify by feel and make the panel look “finished.”

Control wheel emblems

3D emblems and badges for classic aircraft control wheels and yokes—Piper, Mooney, Beech, Learjet, Aero Commander, and more. A small upgrade that brings the cockpit back to life.

Smoke system hardware

Pilot-proven accessories that clean up wiring and protect components—built for the realities of RV smoke systems.

Tools and cockpit details

Small upgrades that make ownership easier: maintenance tools, placards, and cockpit add-ons.

Why pilots buy from me

  • Built by a pilot for pilots

  • Options that match your mission

  • Clean wiring logic and practical ergonomics

  • Tested before shipment

  • Made in the USA

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