Hirth 3503 water cooled 2 cycle 70hp inline engine 3503. A monolithic aircooled aluminum cylinder with a pressedin liner is the signature product, but ac also offers a fresh crankshaft design, some interesting intake manifolds, and even oilcooled cylinders. The selflaunching variant discus bm was only built in very small numbers, but turned out to be an important proof of concept for later engine concepts that also kept the engine remaining in the fuselage. The hirth 3502 and 3503 are a family of liquidcooled, inline twincylinder, twostroke. Equipped with the popular schempp hirth turbo system sustainer engine, more than 150 discus bt have been built.
The cylinders are mounted onto the crankcase by stud bolts, discs and hexagon nuts. Since january 01, 2016, he has been vicepresident for innovation and international affairs. From what i can tell, the hirth 3003 engine is only 7 lbs dry. The 3502 was developed from the 3503 as a derated version and produces 60 hp 45 kw, in comparison to the 3503 s 70 hp 52 kw. Files are available under licenses specified on their description page. Schempphirth duo discus 425 words exact match in snippet view article find links to article the schempphirth duo discus is a highperformance twoseat glider primarily designed for fast cross. Advances such as the nikasil process, use of hypereutectic alloys, exhaust port design and highstrength chromemoly steel crankshafts have made this new breed of engines vastly. Hirth also produces both aircooled and liquid cooled engines in two and three cylinder versions. The f36 was formerly known as the solo 210, before the design was purchased by hirth. Choose your specific model by selecting it from the above menu, or browse below. The 3503e is the high performance fuel injected liquid cooled two cylinder 70hp engine, hirths latest development. The motor was installed on a freebird experimental that crashed on its maiden test flight. With nearly l hp to every pound the 3003 has one of the highest power to weight ratios available. Unless they offer some kind of unlimited warranty for that time, its just a number.
The hirth 3502, 60 hp and the 3503, 70 hp are liquid cooled versions of the 3202 and 3203. The selflaunching variant discus bm was only built in very small numbers, but turned out to. Comment on hirth f30 110hp engine showing 143 of 43 messages. Both engines have the same bore, stroke and compression ratio as the. Hirth does not make snowmobile, water craft, or car engines and then try to modify them for aircraft applications. Hirth 70 hp aircraft engine, hirth 3503 70 horsepower. In 1927, hirth separated this part of the business, renaming it as hirth motoren gmbh, with the remainder becoming mahle gmbh. Hirth motors has launched a new 15hp 4201 engine for the unmanned aerial vehicle uav market, the company announced on 11 january.
The first hirth motoren gmbh engine, the 4cylinder inverted inline hm 60, was released in 1931 and was fairly successful. Hirth engines offer outstanding quality combined with unmatched performance and efficiency. Feb 14, 2018 efi stands for electronic fuel injection. The cylinders consist of an aluminium alloy with a nikasil coated running surface that is highly resistant to wear.
Hirth versus rotax, comparing hirth and rotax aircraft. The hirth 3502, 60 hp and the 3503, 70 hp are liquid cooled versions of the 3202 and. Ummm after hearing what hirth has put into its engines, you might be assuming the cost of these engines to be on the pricey side, but be sure to. The 3502 was developed from the 3503 as a derated version and produces 60 hp 45 kw, in comparison to the 3503s 70 hp 52 kw. I would look at the old crower fuel injection for racing. User manuals, hirth engine operating guides and service manuals. An upgrade in the form of the hm 60r improved efficiency, and was followed by 6, 8 and 12. They have the bugs worked out, and if the manual is followed closely and it is. Hirth motors goeblerhirthmotoren kg has been working with saab on the propulsion system for saabs skeldar v200. There is no manual fuel injection made for these 2 strokes used on planes that i know of, but one could be maybe made.
They use the same bolt pattern on the crankcase and can therefore use the same mount, as well as. Jim, if you go in with the expectation that the hirth engine will last h, you sure to be disappointed. Recreational power engineering hirth engines tiffin, ohio. Moshe hirth, md palm beach digestive associates llc. Hirth snowmobile parts hirth snowmobile engine parts. Hirths phone number, address, insurance information, hospital affiliations and more. Hirth 171r manuals manuals and user guides for hirth 171r. Hirth f 33 aas aircooled singlecylinder engine hirth 33 a. Ummm after hearing what hirth has put into its engines, you might be assuming the cost of these engines to be on the pricey side, but be sure to compare apples to apples and oranges to oranges. If the hirth is able to run hotter it just means you are going to due more damage when it finally goes. The first hirth motoren gmbh engine, the 4cylinder inverted inline hm 60.
All structured data from the file and property namespaces is available under the. Some months ago my father bought a quad city challenger clipped wings with just 35 hours of flight in both engine and airframe. Hirth engines offers 2stroke engines with outstanding quality, unmatched performance and efficiency. Hirth motors 3503 efi engine flying in saabs skeldar v200 vtol. Hirth 3503 70 horsepower water cooled aircraft engine. Posted by christopher braun on january 12, 20 at 2. Hirth engines welcome to the home of twostroke engines. To this day, hirth manufactures many models of two stroke engines for. If you find documents on the 54r, you may find information referring to a 54r1, 54r2, 54r3 or a 54r4. Hirth 70hp 3503e aircraft engine miscellaneous goods gumtree.
Large selection of parts for your all hirth engine 270r snowmobile. The motor was installed on a freebird experimental. The power plant is hirths 3503 efi engine a 625cc water cooled inline 2stroke engine with electronic fuel injection efi producing 60 hp 44 kw. Hirth motors 3503 efi engine flying in saabs skeldar v200 vtol february 7, 2011 see the full news archive for goblerhirth motoren kg. They share the same crankshaft, pistons, and the same bore and stroke.
The hirth 3502 and 3503 are a family of liquidcooled, inline twincylinder, two stroke. Both engines have the same bore, stroke and compression ratio as the threecylinder inline liquidcooled hirth 3701 and the bore, stroke, compression ratio and displacement of the twincylinder hirth 2704 and hirth. Hirth 3503 70 horsepower water cooled aircraft engine recreational power. Operating in an rpm range 1500 rpm higher than the 60hp 3502. Hirth develops new uav engine unmanned vehicles shephard.
Hirth 3503 water cooled 2 cycle 70hp inline engine 3503 special design high torquelow rpm fuel efficient engine model. Hirth engines for 750 zenith aircraft builders and flyers. The germanbuilt hirth f33 is still a twocycle engine and. The hirth f36 is a single cylinder, two stroke, carburetted aircraft engine designed for use on ultralight aircraft, especially powered paragliders and very light ultralight trikes. Its more expensive to build an engine like ours, said dandar. Hirth engines are designed specifically for aircraft use. The 3503 produces 70hp at 6500 rpm while building an impressive torque of 57 ft lbs.
All structured data from the file and property namespaces is available under the creative commons cc0 license. Jul 30, 2014 hirth also produces both aircooled and liquid cooled engines in two and three cylinder versions. From 2012 to 2015, hirth was vice dean of faculty 4 energy, process and bioengineering of stuttgart university. The cylinders consist of an aluminium alloy with a nikasil coated running surface that. Attended medical school in sackler school of medicine in tel aviv, israel and a graduate of new york medical school. What would be nice is to see what size throttle bodies they used on this hirth efi. Basically a 3003 is the 3002 80hp engine equiped with high performance cylinders. 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 power plant is hirths 3503 efi engine a 625cc water cooled in. Recreational power engineering hirth engines tiffin. The aircooled 4201 engine is a reed valve intake 2stroke boxer. Again what difference does it make what the cht limits are the rotax is suppose to run as are hirth engines at 350 egt. Operating in an rpm range 1500 rpm higher than the 60hp 3502 results in much more thrust at full power for vehicles requiring more climb capability than cruise power as the 3502 is designed for.
This gauge is a reliable measurement tool that measures the exhaust. Kohler k91, k141, k161, k181, k241, k301, k321 and. This gauge is a reliable measurement tool that measures the exhaust gases as they. The hirth f36 is a singlecylinder, twostroke, carburetted aircraft engine designed for use on ultralight aircraft, especially powered paragliders and ultralight trikes. Agauge that we recommend on all hirth two stroke engines is the westach exhaust gas temperature gauge egt as in figure 3. Find link is a tool written by edward betts searching for hirth 490 found 954 total alternate case. Hirth is supplying their 3503 efi engine which is a 625cc water cooled inline 2stroke engine with electronic fuel injection efi producing 60. It is noted for its extremely small equipped weight of 28 lb kg including exhaust system, reduction drive and carburetor. They were created primarily to be a drop in replacement for the 582.
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