Name

Kolm Engines

Legal name

Kolm Engines GmbH

Website

https://kolmengines.com

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

1–10 employees

Ownership category

akta.pro rank

Product category

RC Model Aircraft Engines

NAICS

Engine, Turbine, and Power Transmission Equipment Manufacturing (3336), Other Engine Equipment Manufacturing (333618)

SIC

Engines & Turbines (3510), Aircraft Engines & Engine Parts (3724)

akta.pro primary industry

Engine Modules & Hot-Section Components (Compressors/Turbines/Combustors) (IMABADAJ)

Keywords

• Four-stroke model engines
• RC aircraft engines
• Model airplane motors
• Boxer engine manufacturing
• Radio-controlled engine parts

Headquarters

HQ city

Attnang-puchheim

HQ country

Austria

HQ region

Europe

Offices2 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Revenue model

1. RC Engine Sales: One-time hardware sales of four-stroke RC model aircraft engines. Sales through direct webshop and inquiry-based sales for custom/special orders.
2. Accessories and Spare Parts: Sales of engine accessories including electric starter kits, silencers, ignition systems, drill jigs, speedometers, mounting bolts, and RPM controllers.
3. Service and Repairs: Repair requests and spare parts handled via [email protected].

Go-to-market motion2 records

Distribution channels3 records

Marketing channels3 records

Core offering

Kolm Engines develops and manufactures four-stroke engines for radio-controlled (RC) model aircraft, ranging from 50ccm single-cylinder engines to 310ccm four-cylinder in-line engines and a 6-cylinder boxer engine. Production follows a modular construction system that allows customization and special customer requirements, with all design, manufacturing, and testing conducted at the Attnang-Puchheim, Austria facility. The company also offers supporting accessories including electric starter kits, silencers, ignition systems, speedometers, drill jigs, and mounting hardware.

Product overview

Kolm Engines develops and manufactures the world's most powerful four-stroke engines for radio-controlled (RC) model airplanes, as well as a comprehensive range of accessories. The product portfolio consists of three main engine types organized by cylinder configuration: Single-cylinder engines (EZ50-V4, EZ77-V4) for smaller models up to 13-16 kg; Flat/Boxer engines (BX120-V4, BX155-V4, BX240-V4, BX310-V4) for towplanes and aerobatic aircraft up to 50 kg; and In-line engines (IL100-V4, IL150-V4, IL155-V4, IL230-V4, IL310-V4) for Warbirds and Scale models up to 60 kg. The company also produces accessories including electric starters, speedometers, drill jigs, ignition systems, and silencers. All products feature modular design with components made from high-quality solid materials, enabling customization and individual customer requirements. Production and testing are conducted exclusively in Attnang-Puchheim, Austria.

Differentiator

Problem solved

Functional benefit

Products and services

• EZ50-V4 Smallest single-cylinder four-stroke engine in the Kolm Engines lineup, suitable for scale and aerobatic RC models up to 13 kg take-off weight. Can be equipped with an electric starter and two silencer versions.
• EZ77-V4 Further-developed single-cylinder four-stroke engine featuring a Nicasil-coated cylinder, larger bore, reduced weight, and improved performance versus the EZ65. Available in standard and Long Edition versions.
• BX120-V4 Two-cylinder flat/boxer four-stroke engine developed from the BX100 model. Features Nicasil-coated cylinders and a modified body. Designed for scale and tow models up to 23 kg take-off weight.
• BX155-V4 Two-cylinder boxer engine positioned as a power plant in the towing sector, capable of towing gliders up to 22 kg. Known for top noise measurement scores when paired with the optional silencer.
• BX240-V4 Four-cylinder flat four-stroke engine characterized by elegant shape, low vibrations, smooth running, and easy manual start-up. Popular choice for Pitts aircraft installations.
• BX310-V4 Largest 4-stroke 4-cylinder flat engine on the market. Suitable for RC models up to 50 kg take-off weight, covering scale models, tow airplanes, and aerobatic models.
• IL100-V4 Smallest in-line four-stroke engine in the lineup, positioned as the entry point into the Warbird and Scale class with two cylinders. For models up to 20 kg. Available in Long and Short editions.
• IL150-V4 Proven in-line four-stroke engine in the Warbird scene, suitable for models up to 25 kg take-off weight. Features small installation dimensions and an optional electric starter.
• IL155-V4 Extremely reliable in-line drive for Warbird models up to 25 kg take-off weight. Available with 270° or 180° crankshaft. Installation kits include CNC-milled frames and 3D-printed shrouds.
• IL230-V4 Three-cylinder in-line four-stroke engine with Nicasil-coated cylinders, described as a true power house. Featured in the first Galloping Ghost. A special CARF Galloping Ghost edition is available.
• IL310-V4 Four-cylinder in-line four-stroke engine described as the master of power and performance, with a 4-cylinder sound. Suited for RC models up to 60 kg take-off weight. Available in Long and Short versions, with or without electric starter.
• M-360-FT First 6-cylinder 4-stroke boxer engine from Kolm Engines, created by extending the BX240-4 platform with an additional module. Marks the debut of the M series of larger modular boxer engines.
• Electric Starter Kit Universal electric starter compatible with all Kolm engines from the V3 generation onwards. Powered by a Roxxy brushless motor. Protects users against injuries during manual starting.
• Speedometer Tachometer that connects directly to the ignition output of Kolm engines, displaying a 3-digit value to be multiplied by 10 to obtain the engine RPM reading.
• Drill Jig (29 and 34mm) Steel, burnished drill jig for 29mm and 34mm propeller bolt circles, supplied with the required screw. A practical tool for properly drilling the bolt circle into propellers for Kolm engines.
• ISB V2.0 Ignition Box Ignition box developed for electric starters that supplies ignition, fuel pump, and starter motor from a single 3-4S LiPo battery.
• Compact Silencer BX155-2 Compact silencer developed for flat/boxer Kolm engines, offering a very quiet drive with smoke intake and one or two outlet tubes.
• Set of Spacer Bolts M5 Set of four M5 mounting spacer bolts for series and flat engines, including the required screws.

Quantifiable outcome

• Engines power aircraft with take-off weights up to 60kg
• +2 more outcomes

Named customers5 records

Segments3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• Vogelsang Aeroscale (Götz Vogelsang)coreChannel Partner/ Reseller/ Distributor · 1 January 2017Götz Vogelsang from Vogelsang Aeroscale serves as the American distribution partner for Kolm Engines. He demonstrated the products at the Joe Nall Week 2017 event, showcasing Kolm-powered aircraft including an extremely fast CARF Spitfire.

Scale indicators4 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• 3W-Modellmotoren: German manufacturer of large two- and four-stroke RC engines for scale and aerobatic models. Comparable DACH-based premium competitor with overlapping engine sizes and customer base.
• Saito Seisakusho (Saito Engines): Japanese manufacturer of four-stroke glow and gas RC model aircraft engines. Most directly comparable to Kolm in product category (four-stroke RC engines), customer base (scale and aerobatic modellers), and premium positioning.
• Valach Motors: Slovak manufacturer of high-power four-stroke and radial RC model engines (VM, VR series). Closely comparable in displacement range, four-stroke architecture, and target use in large scale aircraft.
• RCGF: Chinese producer of small to large-displacement gas RC engines, including four-strokes, used in scale and aerobatic models. Direct category competitor with broader price-tier reach than Kolm.
• YS Engines: Japanese maker of high-performance four-stroke RC model engines. Comparable to Kolm in four-stroke focus, premium positioning, and target hobbyist segments.
• Desert Aircraft: US manufacturer of large-displacement two- and four-stroke RC engines used in giant scale and warbird applications. Comparable to Kolm's high-end 200–310ccm four-stroke boxer and in-line offerings for aircraft up to ~60 kg.
• OS Engines: Long-established Japanese maker of both two- and four-stroke RC model aircraft engines. Directly competes with Kolm across displacement classes in the same hobbyist and OEM customer segments.
• DLE Engines: Chinese manufacturer of boxed two- and four-stroke RC engines widely used in large scale and gas warbird applications. Comparable product category and customer base, though positioned at lower price points.

Broad incumbents

• Horizon Hobby: Large US RC hobby distributor and brand owner (Spektrum, E-flite, and previously the Evolution engine line). Overlaps with Kolm via the broader RC powerplant and airframe ecosystem rather than direct four-stroke engine competition.

Others

• APC Propellers: US manufacturer of propellers for RC model aircraft. Adjacent ecosystem participant — Kolm's drill jigs and engines are specified together with APC props, making them a complementary (not competitive) peer in the same customer workflow.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/KolmEngines
• LinkedInlinkedin.com/company/kolm-engines

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Kolm Engines