The Honeycomb Sierra TPM Module is a USB throttle quadrant laid out for piston general aviation aircraft. Three push-pull vernier axes with color-coded handles control throttle, prop and mixture, and Honeycomb names the Cessna 172 as the kind of aircraft it suits.
Alongside the verniers are a trim wheel, a parking brake, a flap lever and a landing gear lever with LED indication. It connects to a PC or Mac over USB-C to USB-A, with the cable included.
Sierra suits pilots who mostly fly piston aircraft and want to set power, prop and mixture with push-pull verniers. The throttle vernier can be fixed in position with its shaft screw, and the prop and mixture verniers have a fine adjustment by turning the knob.
The tradeoff is focus. Honeycomb designs Sierra for piston-engine aircraft simulation, so it is a specialised layout rather than a general-purpose quadrant. Honeycomb also lists it as a USB-C device for PC and Mac and does not state that it attaches to, or works as part of, any other Honeycomb product, despite the word "Module" in its name.
Push-pull vernier axes for throttle, prop and mixture, each with a color-coded handle.
The throttle vernier position can be fixed using the shaft screw.
The prop and mixture verniers adjust finely by turning the knob.
A built-in, low-profile trim wheel. Honeycomb calls it high-resolution but does not publish a figure.
A flap lever and a parking brake on the same unit.
A landing gear lever with an LED status indicator.
PC, Mac
X-Plane 11 & 12, Prepar3D, Microsoft Flight Simulator. Honeycomb also states compatibility with Microsoft Flight Simulator 2024 & 2020.
Sierra ships with Honeycomb's "Mounting Solution". Honeycomb does not describe the mounting method further on the product page.
Width 11.73 in / 298 mm, depth 11.93 in / 303 mm, height 4.84 in / 123 mm.
3.8 kg / 8.37 lb, as stated on Honeycomb's product page.
Honeycomb designs Sierra for piston-engine aircraft simulation.
Honeycomb names the Cessna 172 as an example aircraft for its vernier engine controls.
Engine, trim, flap, brake and gear controls in one USB unit for PC or Mac.
| Brand | Honeycomb |
|---|---|
| Product Name | Sierra TPM Module |
| Manufacturer reference | HC003998 |
| System Compatibility | PC, Mac |
| Software Compatibility | X-Plane 11 & 12, Prepar3D, Microsoft Flight Simulator |
| Engine Controls | Three push-pull vernier axes (throttle, prop, mixture) with color-coded handles |
| Vernier Adjustment | Throttle position fixable by shaft screw; prop and mixture fine adjustment by turning the knob |
| Flight Controls | Trim wheel; parking brake; flap lever; landing gear lever with LED indicator |
| Connectivity | USB-C to USB-A (Cable included) |
| Mounting | Mounting Solution (included) |
| Dimensions | Width 11.73 in / 298 mm; Depth 11.93 in / 303 mm; Height 4.84 in / 123 mm |
| Weight | 3.8 kg / 8.37 lb |
| Warranty | 2-year limited warranty, as stated by Honeycomb |
Honeycomb lists Sierra as connecting over USB-C to USB-A to a PC or Mac, and does not list any other Honeycomb hardware as a requirement. It also does not state that Sierra connects to or docks with other Honeycomb units. Contact us if you are planning a combined setup.
Honeycomb lists Sierra for PC and Mac only. Xbox is not listed. Contact us if you fly on Xbox.
X-Plane 11 & 12, Prepar3D and Microsoft Flight Simulator, including Microsoft Flight Simulator 2024 & 2020. Honeycomb publishes Landing Gear LED drivers for MSFS 2024 and MSFS 2020, and Airplane Profiles for MSFS 2024.
Honeycomb states that the throttle vernier position can be fixed using the shaft screw, and that the prop and mixture verniers have a fine adjustment mechanism by turning the knob.
Sierra includes Honeycomb's "Mounting Solution". Honeycomb does not describe it further on the product page, so contact us if you are planning a specific desk or stand.
Honeycomb states a 2-year limited warranty. Contact us for help with a warranty question.
| Specification name | Specification Value |
|---|---|
| Color pattern | Black, Multicolor |
| Connection type | USB |
| Connectivity technology | USB |
| Power source | USB |
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