Kitfox IV
Speedster
N4JU
 

 

 

Aircraft Manual

The following operations Manual and the Aircraft Data have been composed during many flight tests. The testing has been conducted primarily at about 7000 ft and during the warmer season. The engine together with the Warp Drive has the capability to output a considerable torque but also an impressive short field take off capability. To achieve smooth operation of the engine careful adjustment of the fuel flow has to be made whenever another power setting is selected.
 

Operations Manual

 

Start UP (cold)

Wing fuel tank valves (lever horizontal).

For take off and climb out if possible use feed from both wing tanks especially with low fuel levels in the wing tanks.

 

Main fuel valve on center console

 

Battery / Alternator switch

 

Adjust Propeller pitch to
 

Fuses on right side of panel
 

Carburetor Heat
 

Mixture (or set for known altitude value)
 

 

 

 

OPEN

 

 

 

 

ON

 

ON

 

15 - 16

 

CHECK

 

IN / Pushed

 

SET

 

 

Fuel Pump Switch
Check Fuel Pressure In
LOW FUEL light
 

Ignition Switch A + B

 

Prime (red button above Starter)

 

Power / Throttle apply
 

ON

GREEN

CHECK

 

ON

 

press ~2 sec

 

~ 1/2 inch

 

Break pedals
 

Control Stick
 

"Starter, Switch
apply until engine starts and runs continuously". If necessary prime again while cranking
 

Oil Pressure in
 

Adjust power for approx.
 

Position Light
 

Avionics switch
 

 

Start-UP warm

"Expect Vapor-Lock, "
Use primer while cranking to purge fuel vapor. Even after engine catches expect to use primer intermittently for the next half minute

 

Push Hard

 

pull aft

 

UP

 

 

 

GREEN CHECK

 

RPM 1600 - 2000

 

ON

 

ON

 

 

 

 

 

 

 

 

TAXI
 

While taxiing keep stick towards you
 

Prop pitch setting for taxiing
 

"Use pedals primarily for steering, for tight turns add break on top of foot pedals. No sudden hard breaking, aircraft may flip."
 

Directional Gyro and Compass check in turns
 

 

 

 

 

15

 

 

 

 

 

 

Run UP
 

"Secure possible Load on PAX seat,
avoid leaning against door."
 

"All Controls, movement "
Make sure that stick movement is not restricted by tie-down items on passenger seat.
 

"Flapperon, check
with stick control at various settings"
 

For engine testing: Water temperature in
 

Propeller pitch
 

Engine
 

Flip each ignition separately  smooth engine

 

 

 

 

 

 

FREE

 

 

 

FREE

 

 

GREEN

 

16

 

RPM 4000

 

ON - OFF - ON

 

Flip RPM selector switch to other ignition
 

Vacuum above 4000 RPM in
 

Directional Gyro set to compass
 

Altimeter set to altitude
 

VSI (vertical speed indicator)
 

Low Voltage backup power:
normal operation show
pressing TEST
 

Over Voltage warning: Normally light
Press TEST to check light
 

Radio and Navigation Equipment
 

Doors
The aircraft can be flown with both doors open. It will result in a drop in air speed of about 5 kts in cruise.

 

same RPM

 

GREEN

 

SET

 

SET

 

0 ft/min

 

 

2 GREEN

red on AUX

 

OFF

CHECK

 

SET

 

SECURED

 

 

 

Before Take OFF
 

Strobe
 

Transponder
 

Flaps
 

Set Trim
 

Propeller Pitch
 

Mixture (or set for known altitude value)

 

For High RPM operation the electrical fuel pump MUST be on.

 

Low Fuel Lights

 

 

 

 

ON

 

ON

 

 0

 

neutral

 

20

 

IN / Pushed

 

SET

 

 

check  OFF

 

 

Take OFF

Power -- advance slowly towards the end FULL Throttle. Propeller pitch indication may not be reliable or accurate enough causing the engine at full throttle to reach over-speed stop. >>   Increase power carefully towards the end.
RPM should be about 5000 >> if more increase propeller pitch to max 21

 

As aircraft accelerates move stick forward. If delayed the aircraft may attempt to lift off immediately with nose high.

 

When reaching 50 kts ease stick back and lift off

 

Climb with full power and prop setting high RPM.

If engine runs rough adjust mixture carefully.

 

Reaching 500 ft AGL reduce climb rate and

accelerate to 60 kts with full power setting

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

400 ft/min 55 kts

 

 

 

 

 

Cruise Setting general
 

Power setting
 

Propeller Pitch
 

"Mixture, >> lean to rough operation,

then advance until smooth"

 

Set power according to altitude and desired speed. Monitor Water temperature as well as Oil temperature and pressure.

 

 

 

Descent

 

Power setting

 

Propeller Pitch

 

Descent rate

 

Mixture >>  set to smooth operation, adjust frequently

 

 

 

"2 - 3 ""MP"

 

26 - 30

 

 

3 - 4 GPH

 

 

 

 

 

 

 

 

"5 ""MP"

 

 26 - 30

 

400-500 ft/min

 

 

 

Approach and Landing

 

Abeam touch down point:

   - Increase mixture to

 

   - Propeller pitch

 

   - Power

 

Flapperon can be set to

"More Flapperon can not be recommended as it moves the lift too much to the back limiting the control of the elevator. 10 acceptable for 2 wheel landings, has ballooning effect on 3 wheel landings."

 

 

 

~ 1 inch out

 

 20

 

4000 RPM

 

5

 

 

 

 

 

On Final:

Mixture (or set for known altitude value)
 

Propeller pitch

(not higher as engine may be chocked off when in idle and speed gets smaller)

 

Adjust power for airspeed of

 

Over Threshold:

For 2 wheel landing adjust power to

For 3 point landing adjust power to

 

Expect sharp stall with engine in IDLE at

 

If propeller pitch is higher than 20 the engine may quit at this point. The propeller windmills giving no notice of the quitting engine.

"If GO AROUND is required, re-start engine before giving full throttle."
 

"If breaks are necessary, use" GENTLY

 

IN / Pushed

 

 

18

 

 

60 kts

 

 

about 60 kts

over 55 kts

 

50 kts

 

 

 

 

 

 

 

Taxiing

 

Set propeller pitch to

 

Turn Strobe

 

Turn Transponder

 

 

Shutting Off

 

Landing and Taxi Lights

 

Avionics

 

Position Lights

 

Low Voltage Backup Power

 

Fuel Pump

 

Power setting

 

Ignition Switch A + B

 

Battery / Alternator switch

 

Valves to Wing Fuel Tanks

 

 

 

15

 

OFF

 

OFF

 

 

 

 

OFF

 

OFF

 

OFF

 

OFF

 

OFF

 

IDLE

 

OFF

 

OFF

 

2 x OFF

 

For further information select from the directory at the top right

Contact address is   My.Sky2fly@gmail.com

This page was last maintained  2. 9. 2008