What Makes Hirth Engines Different?

When initially looking at the Hirth Aircraft engine line, it may at first appear that Hirth engines are more expensive than equivalent engines from other sources. We would like you to consider the 1000hr rated TBO, one year warranty, superior reliability, and the lower rpm operating range. Over the long run you will find that Hirth engines can actually turn out to be the least expensive choice.

Most engines in the light aircraft market were designed for a specific use on the ground and then altered to be used in aircraft. Hirth engines are designed specifically for aircraft use. Hirth does not make snowmobile, water craft, or car engines and then try to modify them for aircraft applications. Hirth knows that in order for a 2-cycle engine to perform properly in aircraft use, peak power and peak torque have to be achieved at lower rpm's. The engine has to have a realistic TBO and not use complicated rotary valves. The use of Nikasil cylinders and Hyper-Eutectic Aluminum pistons make Hirth engines very seizure resistant. Our red line CHT is 535F, our redline EGT is 1256F. This gives Hirths good fuel efficiency and a very clean oil burn. The use of chrome moly steel crankshafts insure long life with little chance of failure. It costs more to build an engine when you use the best technology and materials available but in the long run you will find that Hirth is the better value.

Hirth Aircraft Line

All Hirths have Al-Nikasil coated cylinders for superior performance and reliability. Al-Nikasil in simple terms is a nickel based material, applied in a paste form. When super heated it becomes part of the cylinder itself. Al-Nikasil provides for a super low coefficient of friction allowing Hirths not only to produce more hp than our nearest competitor but also to run with greater efficiency and reliability.
Hirths crankshafts are 4130 chrome moly steel. Heads, rings, block casting, connecting rods and associated components are all of the highest grade alloys available today. Brief descriptions of the entire Hirth engine line are listed below. Click on the picture of the engines you are interested in for detailed information and current pricing.

 

More details on the F-33 Engine

F-33 2-cycle 28hp The F-33 engines are some of the lightest single-cylinder engines you'll find anywhere. Engine Type: 2-cycle, single-cylinder Horsepower: 28hp @ 6500rpm Torque: 25ft-lbs @ 6000rpm Cooling: Free air cooled by prop or slip stream (optional fan cooling available)

 

More details on the F-23 Engine

F-23 2-cycle 50hp If you prefer an opposed cylinder engine, then this one's for you. The F-23 puts out an amazing 50hp at only 6150rpm and provides 42ft-lbs of torque. All with a total weight of only 78lbs. This engine can handle any Part 103 ultralight and most single seat experimentals. Opposed pistons cancel out each others internal inertia forces resulting in an amazingly smooth running engine. Engine Type: Opposed, 2-cycle, 2-cylinder Horsepower: 50hp @ 6150rpm Torque: 42ft-lbs @ 6150rpm Cooling: Free air cooled by prop blast

 

More details on the 3202 Engine

3202 2-cycle 55hp (Replaced Hirth 2704 - May 2002) Hirth's High Torque low rpm engine. The 3202 produces 55hp at only 5500rpm while building an impressive torque of 52ft-lbs. at only 4500rpm. This low rpm operation equates to the smoothest and quietest running power plant you'll will find anywhere. Hirth 3202 the biggest little engine available. Engine Type: 2-cycle, 2-cylinder Horsepower: 55hp @ 5500rpm Torque: 53ft-lbs @ 5000rpm Cooling: Optional, fan cooled or free air cooled by prop

 

More details on the 3203 Engine

3203 2-cycle 65hp (Replaced Hirth 2706 - May 2002) Hirth's most popular engine. The 3203 produces more horsepower and torque per pound then any other engine in it's class. The Hirth 3203 is the premiere powerplant for the heaviest of ultralight trainers and light experimentals today. Engine Type: 2-cycle, 2-cylinder Horsepower: 65hp @ 6300rpm Torque: 55ft-lbs @ 6000rpm Cooling: Optional, fan cooled or free air cooled by prop

 

 

More details on the 3503 Engine

3503 Water Cooled 2-cycle 70hp The new 3503 2-cylinder water cooled engine. Engine Type: 2-cycle, 2-cylinder InLine Horsepower: 70hp @ 6500rpm Torque: 57ft-lbs @ 6000rpm Cooling: Liquid cooled

 

QUALITY SUPPORT

While the quality and design of the engine is of course important. After-sale support of the engine is of equal importance. Recreational Power Engineering has developed the most comprehensive support system in the industry. Engines are warranted for a full year plus a 3 year pro-rated crankshaft warranty. Warranty not only covers defective parts but also labor, free tech support, and prepaid return shipping of the engine. These are all unprecedented support features.

NOTE: Hirth engines are manufactured on a limited basis. There can be a 4 to 6 week lead-time on some models. It is best to get your order in well before your kit is complete to avoid waiting on your engine. 50% down is required to order.

!!!Prices subject to change without notice. Call or write for current pricing!!!

We hope you like what you've seen

Thank you for visiting RPE's Hirth Web Pages. Let us know via e-mail, phone, fax, or snail-mail, which engine(s) interest you and we will be happy to send you detailed data sheets and 9"X 11" dimensional drawings free of charge. Full size prints are available for $10 each. If you have any questions feel free to contact us at your convenience.

Thanks for giving Hirth a look