{{short description|Australian 8-cylinder aircraft engine}} {{Use dmy dates|date=November 2019}} <!-- This article is a part of Wikipedia:WikiProject Aircraft. Please see Wikipedia:WikiProject Aircraft/page content for recommended layout. --> {{infobox aero engine |name=Jabiru 5100 |image=Jabiru5100-180hp.jpg |caption= |engine_type=Piston aero-engine |national_origin=Australia |manufacturer=Jabiru Aircraft |first_run= |major_applications= }} The '''Jabiru 5100''' is a lightweight four-stroke horizontally opposed flat-eight air-cooled aircraft engine, manufactured by Jabiru Aircraft.
==Design and development== The engine is direct-drive and is fitted with alternators, silencers, vacuum pump drives and dual-ignition systems as standard equipment.
It was developed from the Jabiru 2200 and 3300 aeroengines, but whilst these earlier modular-design engines share the same bore and stroke (97.5mm x 74 mm), the 5100 flat-eight shares only the 97.5mm bore, and the stroke is increased from 74mm to 85mm.{{Citation needed|date=November 2013}}
In November 2014 the Australian Civil Aviation Safety Authority proposed restricting all Jabiru-powered aircraft to day-visual flight rules only, without passengers or solo students and within gliding distance of a safe place to land due to the engine line's safety record. Both the manufacturer and Recreational Aviation Australia opposed the restrictions as unnecessary and unwarranted.<ref name="Niles15Nov14">{{cite news|url = http://www.avweb.com/avwebflash/news/Australia-Eyes-Jabiru-Restrictions223107-1.html|title = Australia Eyes Jabiru Restrictions|access-date = 17 November 2014|last = Niles|first = Russ|date = 15 November 2014| work = AVweb}}</ref> The final rule adopted somewhat softened the restrictions, allowing the carriage of passengers and students, but requiring them to sign an acknowledgement of risk before flying and restricting equipped aircraft to day VFR flight and within gliding distance of a safe place to land.<ref name="Niles21Dec14">{{cite news|url = http://www.avweb.com/avwebflash/news/CASA-Issues-Jabiru-Final-Rule223279-1.html|title = CASA Issues Jabiru Final Rule|accessdate = 22 December 2014|last = Niles|first = Russ|date = 21 December 2014| work = AVweb}}</ref>
As of December 2023 the Jabiru 5100 is not listed on the Jabiru web site. The maintenance manual for the 5100 engine on the Jabiru web site states that the engine is no longer in production and only 50 units were ever produced.<ref>{{cite web |url=https://jabiru.net.au/wp-content/uploads/2020/09/JEM5101-4_IM-1.pdf |title=INSTRUCTION AND MAINTENANCE MANUAL FOR JABIRU 5100 AIRCRAFT ENGINE DOCUMENT No. JEM5101-4 |access-date=13 December 2023 |date=September 2020}}</ref>
==Applications== *Ibis GS-750 Grand Magic *Quikkit Glass Goose<ref name="WDLA11">Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', page 116. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X</ref>
==Specifications== {{pistonspecs| <!-- If you do not understand how to use this template, please ask at Wikipedia talk:WikiProject Aircraft --> <!-- Please include units where appropriate (main comes first, alt in parentheses). If data are missing, leave the parameter blank (do not delete it). For additional lines, end your alt units with )</li> and start a new, fully formatted line with <li> --> |type=Flat-8 |bore=97.5 mm (3.84 in) |stroke=85.0 mm (3.346 in) |displacement=5,077 cm³ (310 in³) |length=960 mm (37.79 in) |diameter= |width=638 mm (25.12 in) |height=445 mm (17.54 in) |weight=117 kg (257 lbs) with exhaust, carburetors, starter motor, alternator & ignition system |valvetrain= |supercharger= |turbocharger= |fuelsystem=Mechanical fuel pump |fueltype=AVGAS 100/130 |oilsystem=Wet sump |coolingsystem=Air-cooled |power=126.8 kW (170 hp) at 2,700 RPM (continuous); 134.2 kW (180 hp) at 3,000 RPM (intermittent) |specpower= |compression=8:1 |fuelcon= |specfuelcon= |oilcon= |power/weight=1.10 kW/kg }}
==See also== *ULPower UL520i
==References== {{Reflist}}
==External links== {{Commons category}} *{{Official website|http://www.jabiru.net.au/}}
{{Jabiru aeroengines}}
Category:Boxer engines Category:1990s aircraft piston engines Category:Jabiru aircraft engines Category:Eight-cylinder engines