2 Loop

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Revision 1 - 18 Nov 2004 2004 Eagle Flight Training Ltd

Aerobatic FlightThe Loop

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Objective

To fly the aircraft completely through 360

pitch and loop the aircraft.

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Considerations

A perfect loop in a high performance aircraft would be

executed from straight and level.

Due to the low performance of training aircraft this isnot possible.

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Considerations

We must gain enough energy and expend this at ahigh enough rate to fly over the top of the loop.

If attempted at an acceleration rate below the

minimum required, the aircraft will run out of speed atthe top of the manoeuvre and stall.

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Considerations

G In order to fly a circular loop we must:

Maintain the rate of pitch / looping (constant)

Establish 3.5g on entry and exit, and approximately

+ve 0.5g at the top

First time that you will be exposed to high G.

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Forces in a Typical Loop

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Engine Handling

Power (RPM) Smooth movements (red line)

Mixture Full rich

Carb heat Normal use Ts & Ps Monitor

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Airmanship/ Human Factors

IMSAFE LOOKOUT HASELL-HELL

Use well defined ref points and features

Flaps up Load factor, airspeed and power limits (AFM)

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Airmanship/ Human Factors

Entry Select line feature & reference point Lower nose to gain entry airspeed:

Left Rudder -Reduce throttle as required RPM

Set entry attitude Keep Straight At entry speed (ref A/C flight manual) Smooth & positive pitch-up to 3.5g (balance) Check wings level through horizon

Look to the wing tip to ensure a constant pitch rate Full power approaching vertical: Right rudder

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Air Exercise

Approaching and at the Top Head back and search for the horizon Ease back pressure as the nose approaches the

inverted attitude (key point) to avoid buffeting andattempting to maintain a symmetrical pattern (positiveg throughout) continued pitch change

Check wings level while inverted - Right rudder

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Air Exercise

Exit Increase back pressure when the nose is below the

inverted horizon

Search for line feature / reference point and checkalignment Left rudder

Reduce power - control RPM

Wings level and keep straight on the ref point

Pitch up to the climbing attitude

Set climb power

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Questions

2 Loop

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