Victorian Sport Rotorcraft Association

E - ROTAX Aircraft Engines Tech Tips......

Fri, 16 Nov 2007 11:50:00 +1100

ROTAX Aircraft Engines Tech Tips...

In this section we will try to answer many of the technical questions which arise during installation or use of Rotax engines. We will break down this section into different areas, for ease of use.

Installation / Break-In Issues
Frequently asked Questions
Electrical Systems
Lubricants
Fuel Systems
Propellors
Exhaust Systems
Troubleshooting

E - Incredible footage INSIDE a Petrol Engine thats running!

Sun, 14 Oct 2007 18:30:00 +1000

Piston, valves and spark plug all clearly show that simple action to make engines run.
High pressure and miniature temperature resistant 1000fps camera was used.

A listing of some of the Subaru Engine Specs

Wed, 3 Oct 2007 09:10:00 +1000

A listing of some of the engine specifications throughout the years for Subaru engines.

R - All about spark plugs

Mon, 3 Sep 2007 18:30:00 +1000

All about spark plugs for rotary engines, substantial portions apply to traditional piston engines as well.

R - The incredible Mazda wankel rotary aircraft engine

Sun, 2 Sep 2007 23:10:00 +1000

Please remember, Paul Lamar is based in the USA. Certain references and costs are based on the USA rather than Australia.

The incredible Mazda Wankel rotary aircraft engine.

Copyright 1988-2004 By Paul Lamar

G - Glossary Gyroplane Terms.

Wed, 22 Aug 2007 14:00:00 +1000

1-Per-Rev:- Usually referring to rotor vibration cycles that occur once for every complete revolution of the rotor. 1-Per Rev rotor vibrations are caused by mass or aerodynamic imbalance of the rotor – the Center of Mass and aerodynamic Centers not concentric to the spinning axis of the rotor.. Rotor vibrations may be felt in either he cyclic control stick or in the airframe. 1 Per Rev vibrations can be verified if they continue in a zero airspeed vertical flat decent – no forward airspeed to create confusing 2-Per Rev vibrations. See also “Center of Mass,” “Aerodynamic Center,” “Rotor Shake,” “Tracking,” and “2-Per Rev.”

2-Per Rev:- Usually referring to rotor vibration cycles that occur twice for every complete revolution for a 2-bladed rotor system. Some 2-Per Rev rotor vibrations are inevitable to some extent in semi-rigid 2-blade rotor systems at forward airspeeds due to varying total rotor drag as the blades move from lateral alignment to longitudinal alignment. Other 2-Per Rev rotor vibrations can be generated by a mis-match of the teeter height and the coned CG of the rotor, and by looseness or “slop” in the teeter pivot and support. 2-Per Rev rotor vibrations or shake is usually felt more in the cyclic control stick rather than in airframe vibrations. 2- Per Rev vibrations can be verified if they decrease or disappear at very low or zero forward airspeeds. See also “Coning Angle,” “Rotor Shake,” and “1-Per Rev.”

P - Ivoprop Repairs

Tue, 10 Jul 2007 00:00:00 +1000

DINGS
When fixing dings first if you see broken fibers restore them with fast drying super glue, then use polyester resin or 2 part epoxy to fill the void and then sand it back to its original shape. The skin is polyester gel coat with black pigment. The inner core is 2 part epoxy with micro balloons making a high density foam. If the leading edge is split open or if there is a large bulge around the strike then it is probably not repairable.