Hirth f33 greetings, i am researching uls, planning to purchase one, have considered three or four so far. Chris koepfer editor emeritus, production machining. Recreational power engineering hirth engines tiffin. Hirth engines offers 2stroke engines with outstanding quality, unmatched performance and efficiency. Hirth 3503 water cooled 2 cycle 70hp inline engine 3503. The motor was installed on a freebird experimental that crashed on its maiden test flight. An upgrade in the form of the hm 60r improved efficiency, and was followed by 6, 8 and 12cylinder versions based on the same machinery. They were created primarily to be a drop in replacement for the 582. The hirth 3202 and 3203 are a family of inline twin cylinder, two stroke, carburetted aircraft engines, with optional fuel injection, designed for use on ultralight aircraft, especially two seat ultralight trainers, gyrocopters and small homebuilts. Two cycles, boy some folks sure hate them archive eaa forums. Hirth aircraft engines, built in germany, utilize some of the worlds most.
This unit retains the strength of a triangular bolt pattern and eliminates the added weight of a. A rich fuelair mixture which can be caused by improper jetting, clogged air filter, improper. All hirth engines come complete with carbs, exhaust manifolds, electric starter, alternator, rectifier, starter relay, air filters, fuel pump, ignition system, manuals, and one year warranty. Register at, you can get 10 am points track order status get product discount info win credit point by lucky draw. Hirth aircraft engine now available in high torque, low rpm versions, from recreational power tiffin ohio. These are either original or copies of manuals and blueprints used when these aircraft were in active duty, now transferred into electronic format. The hirth 3502, 60 hp and the 3503, 70 hp are liquid cooled versions of the. The company was founded by hellmuth hirth in 1920 as hellmuth hirth versuchsbau, renamed leichtmetallwerke gmbh and finally elektronmetall gmbh as a manufacturer of light alloy engine components, including parts for aircraft engine components. Dec 30, 2017 hirth aircraft engines, hirth f23, f36, f33, 2702, f23, f3202, f3203, 3502, 3503, 3702, recreation duration.
The 3703 is hirths watercooled alternative to the popular 3003 air cooled engine. Hirth versus rotax, comparing hirth and rotax aircraft. Agauge that we recommend on all hirth two stroke engines is the westach exhaust gas temperature gauge egt as in figure 3. Hirth 3503 70 horsepower water cooled aircraft engine. Hirth is supplying their 3503 efi engine which is a 625cc water cooled inline 2stroke engine with electronic fuel injection efi producing 60 hp 44 kw. The 3703 is hirth s watercooled alternative to the popular 3003 air cooled engine. Rotax toc 20hp 4cyc wrpm of 2000 at blades, recommended 350 adam gibson rotax 277. If the hirth is able to run hotter it just means you are going to due more damage when it finally goes. Oem replacement this part is aftermarket equipment designed to replace the original manufacturers part numbers specified here. Hirth motor 500 a aircraft engine handbook manual german. Each designation may refer to simple differences like the orientation of. With nearly l hp to every pound the 3003 has one of the highest power to weight ratios available. The hirth f30 will certainly be the clear choice for light aircraft builders in need of efficient, quiet yet powerful engines.
Find great deals on ebay for hirth and hirth engine. This gauge is a reliable measurement tool that measures the exhaust gases as they. The motor used in the diablo is a special model of the common 54r hirth used in many sleds back in the late 60s and early 70s. The cylinders are mounted onto the crankcase by stud bolts, discs and hexagon nuts. The hirth 3502 and 3503 are a family of liquidcooled, inline twincylinder, twostroke, carbureted aircraft engines, with optional fuel injection, designed for use on ultralight aircraft and small homebuilts. Hirth 2706 driving us crazy im coming here looking for help, and im pretty sure this is the right place. To this day, hirth manufactures many models of two stroke engines for. This item is sold for historical and reference only. Torco th350c 350c lockup 22002500 stall torque converter. Jim, if you go in with the expectation that the hirth engine will last h, you sure to be disappointed. Hirth motors 3503 efi engine flying in saab skeldar v200. The hirth 3502 and 3503 are a family of liquidcooled, inline twincylinder, twostroke, carbureted aircraft engines, with optional fuel injection, designed for use.
Hirth aircraft engines, recreational power hirth aircraft. Hirth aircraft engine now available in high torque, low. Hirth engine is famous for the its reliable and long life in the world. In contrast, the two 60 hp, hirth 3502 and 3503 engines, use a g50. Hirth engines welcome to the home of twostroke engines. Unless they offer some kind of unlimited warranty for that time, its just a number. It will most likely will need new rings, gaskets, and seals. The engine did get some scrapes and dents as seen in the following pictures, but just a few, and they are. Hirth aircraft engine now available in high torque, low rpm.
If you find documents on the 54r, you may find information referring to a 54r1, 54r2, 54r3 or a 54r4. Din en iso 3503 201506 plastics piping systems mechanical joints between fittings and pressure pipes test method for leaktightness under internal pressure of assemblies subjected to bending iso 3503. I do have pic of the engine id tag for more information. Hirth engine design features every hirth engine has a chromoly crank shaft and nikasil cylinders, he said. Figure 10 hirth 3503 water cooled engine saab skeldar uav. The hirth 3502, 60 hp and the 3503, 70 hp are liquid cooled versions of the 3202 and 3203. Hirth 3503 70 horsepower water cooled aircraft engine recreational power. The hirth 3502 and 3503 are a family of liquidcooled, inline twincylinder, twostroke, carbureted aircraft engines, with optional fuel injection, designed for use on ultralight aircraft and small homebuilts, and produced from april 2008. The 3503 produces 70hp at 6500 rpm while building an impressive torque of 57 ft lbs. We have the best prices on the net for hirth snowmobile engine parts after shipping and handling.
Thanks to our advanced conversion technology the quality of the output will be exactly the same as if the file was saved through the latest microsoft office 2019 suite. The conversion of an scs petrol engine fed with heavy fuel maintains the. Transmission direct drive assembly commonly referred to as a torque converter eliminator, this assembly replaces the converter for those type applications where a direct drive is required. Most hirth snowmobile parts are shipped same day on orders placed before 12. Operators manual engine model 3503 read this operators manual thoroughly before putting the engine into operation for the first time and comply strictly with the instructions given here.
They have the bugs worked out, and if the manual is followed closely and it is. Hirth motor 500 a aircraft engine handbook manual german language. Sep 17, 2009 i have a f33 as engine30hp with hirth s exhaust, i used it as an engine of my paramotor, no reduction, directly drive proper diameter 80cm,f33 as weigts 12. This 9minute video covers machining a hirth coupling. Pro king torque converters year engine application part no. In 1927, hirth separated this part of the business, renaming it as hirth motoren gmbh, with the remainder becoming mahle gmbh. The inlet side airbox will have ducting to smoothly convert kinetic energy. They share the same crankshaft, pistons, and the same bore and stroke. This makes it possible to convert the wasserboxer back to an aircooled. My name is bill i have a 650 hirth engine from the late 70s early 80s that was brand new out of the box my step dad use to sell snowmobiles back in the day we put it in a sled and ran it about an hr then my step dad passed away its out of the sled and sitting in my heated basement want to sell it but have no idea what its worth can someone. Again what difference does it make what the cht limits are the rotax is suppose to run as are hirth engines at 350 egt. Standard engine is premix and oil injection is available for either the carb or fuel injected versions. The first hirth motoren gmbh engine, the 4cylinder inverted inline hm 60, was released in 1931 and was fairly successful.
The 3503 is a water cooled, reed valve controlled 2cylinderinline2stroke engine with electronic fuel injection or carburettor and nikasil coated cylinders. Kg hirth motors has launched a new 15hp 4201 engine with advanced technology to create a new consumer off the shelf cots propulsion system which meets the demanding requirements of the unmanned aerial vehicle uav market. For more recent exchange rates, please use the universal currency converter. Hirth engines have been produced since the beginning of powered flight and our engineering excellence continues with performance and efficiency as the driving force in all our products. Hirth snowmobile parts hirth snowmobile engine parts. Goeblerhirthmotoren kg hirth motors has been working with saab on the propulsion system for saabs skeldar v200 vertical takeoff and landing vtol unmanned aerial vehicle uav. Hirth does not make snowmobile, water craft, or car engines and then try to modify them for aircraft applications. Recreational power engineering hirth engines tiffin, ohio.
Silnik hirth 3503 hf z generatorem o mocy 2 kw przeznaczony do napedu dronu. Large selection of parts for your 19691970 hirth engine 211r snowmobile. The hirth 3502 and 3503 are a family of liquidcooled, inline twincylinder, two stroke, carbureted aircraft engines, with optional fuel injection, designed for use. Read next a fond farewell heading into retirement deadline approaching for parts cleaning conference speakers sanitize machine controllers regularly during coronavirus outbreak. 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 rpms. The aircraft incredibly fuel efficient and can provide comfortable touring experience thanks to comfortable cruise speed 90. My problem is, the byf probably my favorite so far, has a waiting period of a year or more, plus the cost is more than i like. Hirth knows that in order for a 2 cycle engine to perform properly in aircraft use, peak power and peak torque have to. Powerfin propellers are 2,500 kgcm2 for a big threeblade model and 1,800 kgcm2 for a two blade model. The cylinders consist of an aluminium alloy with a nikasil coated running surface that is highly resistant to wear. Some months ago my father bought a quad city challenger clipped wings with just 35 hours of flight in both engine and airframe. Hirth warranty is 1 year from date of delivery, with the crankshafts having a 3 year pro. According to dandar, hirths specific hirth engine design features are what make it more reliable.
It has one of the highest power to weight ratio available on the 70 hp engine market. What would be nice is to see what size throttle bodies they used on this hirth efi. At hirth we continually develop stateoftheart technology applied to the proven twostroke principle. Second is the belite, however if you choose the 4 stroke, it. This post will provide more details on hirths family of cots uav engines and a. Almost all rotax engines used 36mm bing 54 carbs 277ul, 377ul, 447ul, 503ul, 532ul, 582ul. Simple, light and modern 2 stroke engine from proven manufacturer suitable for pilots up to 90 kg.
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