Didgeridoo Pulse Jet Engine User manual

Seadog Designs
Nicolas Cunningham
C0405139
Pulse Jet EnginePulse Jet Engine
Assembly Manual

Index
2/9
About the Didgeridoo
Supply List
Air Controller
Fuel Injector
Housing
Power Supply
Enjoy!
3
6
4
7
8
9
5

About the
Didgeridoo
3/9
INTRO
The Didgeridoo Pulse Jet Engine is a hobby rocket designed by
Ron Burnhardt. From the original drawings an updated drawing
package has been made by Nicolas Cunningham. Links to both
the original and updated drawing packages can be found below.
Assembly manual and operations manual is also available for free.
“Play your Didgeridoo safely”
- Ron Burnhardt
Original Drawing Package
https://dokumen.tips/documents/didgeridoo-pulse-jet-plans.html
Updated Drawing Package
https://seadog.designs/didgeridoo-pulse-jet-drawing-package.html
Operations Manual
https://seadog.designs/didgeridoo-pulse-jet-user-manual.html
WARNING
When assembling and operating the Didgeridoo Pulse Jet Engine
extreme caution is warranted. If you can be safe then you can
have fun!
During assembly be sure to NOT have any fuel nearby as the
electronics can spark and cause a fire!

Supply List
4/9
SAFETY GEAR
Safety Glasses
Fire Extinguisher
Insulating Gloves
Rags
Sawdust / Fuel Absorber
TOOL LIST
M10 Wrench
Wire Stripper
Wire Cutter
AIR CONTROLLER
Tip
Collar
Plate
Air Cover
Diverter
Bolt
NOTE
Throughout the manual parts are
listed in the order they appear in
drawings.
FUEL INJECTOR
Fuel Controller
Locking Nut
Receiver
Diverter
HOUSING
Front Housing
Air Controller
Rear Housing
Fuel Injector
Sparkplug
POWER SUPPLY
12’ of Electrical Wire
After Cutting
Short (3 feet) x 2
Long (6 feet) x 1
Wire Connectors
Power Controller
Battery
HOUSINGHOUSING
AIRAIR
COCONNTTRROLLEROLLER
FUELFUEL
INJEINJECTCTOROR
POWER SUPPPOWER SUPPLLYY

Air Controller
Assembly
5/9
Grab the Plate.
Slide the Coller over the rod.
Screw the Tip into place.
The Air Controller is now assembled!
It should look like the image above.
Slide the Air Cover over the Bolt.
The orientation works both ways
Loosely screw the Bolt, with the Air Cover
and Diverter on it, into the rear of the
Plate.
Tighten the bolt the rest of the way.
Grab the Bolt.
Slide the Diverter over the bolt.
NOTE
Use the Wrench to ensure a tight fit.
NOTE
Insure the Air Cover fully covers the holes
on the Plate.
NOTE
Make sure the curved face of the Diverter
is facing away from the Bolt head.
INSTRUCTIONS
1
4
2
5
6
7A
7B
3
PARTS LIST
Tip
Collar
Plate
Air Cover
Diverter
Bolt
TOOL LIST
M10 Wrench
NOTE
Use the Wrench to ensure a tight fit.
NOTE
If you are having issues with misfiring
double check that the Plate holes
are fully covered by the Air Cover.
77
55&& 66
44
11
22
33

33
11
22
55
44
Fuel Injector
Assembly
6/9
Grab the Diverter.
Fully screw the Receiver into the Diverter.
Partially screw the Locking Nut onto the
Receiver, approximately half way.
The Fuel Controller is now assembled!
It should look like the image above.
PARTS LIST
Fuel Controller
Locking Nut
Receiver
Diverter
TOOL LIST
M10 Wrench
Finish screwing the Locking Nut onto the
Receiver until you feel resistance
Only tighten enough so that the Fuel
Controller is no longer able to move.
Screw the Fuel Controller into the
Receiver until you feel resistance.
NOTE
Use the Wrench to ensure a tight fit.
NOTE
Don’t tighten the Fuel Controller too much
as this can damage the tip and allow fuel to
leak out.
NOTE
Over tightening the Locking Nut may
damage the threads.
INSTRUCTIONS
1
4
2
5
3

Housing
Assembly
11
33
55
22
44
7/9
Grab the Rear Housing so that the front is
facing up.
Place the Air Controller on top of the Rear
Housing with the tip pointing up.
With the Air Controller in place screw the
Front Housing on top of the Front Housing.
PARTS LIST
Front Housing
Air Controller
Rear Housing
Fuel Injector
Sparkplug
TOOL LIST
M10 Wrench
Screw the Spark Plug into the hole on the
Rear Housing.
Screw the Fuel Injector into the hole on
the Front Housing.
The Housing is now assembled!
NOTE
The Plate should be the only part touching
the Rear Housing.
NOTE
If you are having issues with
misfiring try placing some wax,
putty or plumbers tape around the
edge of the Plate where it mates
with the Front Housing to insure an
airtight seal.
INSTRUCTIONS
1
4
2
5
3
NOTE
Use the Wrench to ensure a tight fit.

88
1111
1313
55
66
1010
77
44
1212
99
Power Supply
Assembly
8/9
Cut two portions of the Electrical Wire at
arms length.
You should be left with three length of
Electrical Wire.
Grab the long Electrical Wire.
Use a Wire Connector to attach one
end of the Long Electrical Wire to
the GREEN wire on the Spark Plug.
Connect the other end of the Long
Electrical Wire to the GREEN tab on
the Battery.
Grab the second Short Electrical Wire.
Press the BLUE tab on the rear of the
Power Controller and insert the Short
Electrical Wire into the hole.
Leave the other end of this wire dangling.
PARTS LIST
12’ of Electrical Wire
After Cutting
Short (3 feet) x 2
Long (6 feet) x 1
Wire Connectors
Power Controller
Spark Plug
Battery
TOOL LIST
Wire Stripper
Wire Cutter
Grab one Short Electrical Wire and the
Power Controller.
Press the RED tab on the rear of the
Power Controller and insert one end of
the Short Electrical Wire into the hole that
opens up.
Use a Wire Connector to attach the other
end of the same Short Electrical Wire to
the RED wire on the Spark Plug.
Grab the dangling wire.
Connect the wire to the BLUE tab
on the Battery.
Use the Wire Stripper to remove roughly a
fingers width of the plastic insulator on all
the ends of the Electrical Wires.
NOTE
Two wires should be arms length.
(Short Electrical Wire)
One wire should be roughly double the
length of the smaller wires.
(Long Electrical Wire)
TIP
To do this lift the tab on the battery
and insert the Electrical Wire into
the hole.
Press down on the tab until you hear
a “click”.
TIP
To attach two wires with a Wire
Connector.
1. Pinch the ends of both wires
together and place the Wire
Connector over the top of them.
2. Twist the Wire Connector
clockwise.
INSTRUCTIONS
4
1
2
3
9
10
11
12
13
5
6
7
8

Enjoy!
9/9
JUST THE START
Thank you for building the Didgeridoo Pulse Jet Engine. We hope
you had fun! If you wish to learn the best way to operate and
maintain your Didgeridoo download the Operation Manual from
the link below.
Original Drawing Package
https://dokumen.tips/documents/didgeridoo-pulse-jet-plans.html
Updated Drawing Package
https://seadog.designs/didgeridoo-pulse-jet-drawing-package.html
Operations Manual
https://seadog.designs/didgeridoo-pulse-jet-user-manual.html
CONTACT
If you have any questions, or recommendations feel free to email!
[e-mail]