Model Airplane Club, California, USA
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Gasparin G-24
Basic technical characteristics:
The motor test results with tank 3ccm. Ta = 22ºC as measured at July 7, 1999.
Original wood propeller JAS D110x90mm. Charged from 200g bulb.

Performance Data


Operating Instructions for the GASPARIN G28 CO2 motor

The GASPARIN G28 motor is designed for driving small and light slow fly models, or small scale models fitted with a radio or infrared control system.
The construction of the motor is based on the construction of the excellent motor GMW73 designed for driving the FF models of the category CO2 FAI F1k.
The motor is designed for a maximum use of the compressed CO2 energy from the flight tank featuring a volume of 3ccm.

The construction of the motor has following characteristics:

The motor is designed for the work at medium revolutions 2500 to 3000 RPM with a supplied wooden propeller D125mm, 5 Inch, or with a similar propeller. The motor is suitable for driving models up to a weight of 20 grams, i.e. 0.7 oz, with a good sliding capacity. The properties of the motor are shown by the performance charts enclosed hereto.

Specification:

Bore 2.853 mm Stroke 4.5 mm
Volume 28.70 cmm Weight 7.1 g, 0.25 oz with propeller

The G28 has been designed for higher efficiency in comparison with standard motors. Please, pay appropriate attention to its operation.

Filling the CO2 tank

When testing the motor, or testing a flying model, it is possible to fill the tank with a gas only charge. This provides a limited run of the motor. To achieve a "Gas" charge, hold the nozzle of the charger pointing up and the filler of the motor pointing down. To fill the tank with a "Liquid" charge, therefore give a longer motor run, reversing the procedure for the gas charge.

Maximum filling of the tank with liquid CO2 and with the under cooling of the tank

In order to achieve the highest flight performances of the models, the filling with a liquid with the under cooling of the tank is used. It is possible to put up to 2.7 gram, i.e. 0.095 oz of liquid CO2 to a strongly under cooled tank of a volume of 3ccm. For the maximum filling you can use filling bombs of a larger volume up to 0.3 liters, the best possibility are 12-gram bombs used for sport shooting.

Filling procedure:

Starting and setting the speed
The motor is supplied with the revolutions set. The cylinders are secured locking collars. Do not turn the cylinders more than 1/4 turn from the original setting.

Fill the tank and, making sure the motor is firmly secured, strike the tip of the propeller in the direction of the rotation required. Do not try to stop the motor when running, because of the level of torque generated, this could damage internal parts. If you do wish to adjust the speed or dismantle the motor to repair parts or cure leaks, we suggest the following method: Lubricate the motor before testing. Loosen the locking collar in the cylinder and unscrew the cylinder so much, that the valve in the cylinder could close in compression stroke. After charging the tank, when the crankshaft is revolved, the cylinder is not working. Now screw in the cylinder slightly until the motor runs at final speed.

The setting of the motor is completed by securing the locking collar without upsetting the position of cylinders.
IMPORTANT
DO NOT  attempt to operate the motor over medium revolutions of 4000 RPM using an oversize propeller as this could cause damage to the motor.
Beware of the situation  when any cylinder is screwed in too much that the piston in the power stroke cannot open the outlet openings. Full gas pressure in the piston blocks the motor run and this action is very dangerous for the O-rings of the motor pistons.

Motor Lubrication
It is essential to lubricate the motor between each 2-3 runs. Use special CO2 or sewing machine oil, light bicycle oil can be used as well. A syringe as used by diabetics makes a useful injector for the oil in the small quantities needed.
Connection
Before starting the motor for the first time, lightly check whether all the joints and pipe connections are tight. Loose connections can blow the seals when under pressure.
Always empty all the gas from the motor after use.
Storage and Cleaning
Before storing the motor for any length of time it is always desirable to clean and lubricate it.
Cleaning should be done with a soft brush using medicinal clean petrol or paraffin. Cleaning the cylinder head valve can be done by using a piece of soft balsa wood sharpened to a dull point. Do not enlarge the hole in the cylinder head valve as this will allow the ball to drop through and prevent that cylinder from working. Lubricate after cleaning as described above. Motor and filling valve should be disassembled carefully above a suitable pad in order to avoid losses of small parts.
List of spare parts supplied together with the motor, when available.
 
1 Screw for the propeller attachment M1.4x10 1 Cylinder valve seat
3 Screws of the motor attachment M1.2x8 1 Filling needle valve gasket
1 Ball of the cylinder valve D 1 2 O-ring of the piston 2x0.5
1 Ball of the filling valve D 1.5 1 O-ring of the tank 1.5x0.75
1 Cylinder head inlet sealing 0.5x0.25x1.2 1 O-ring of the cylinder head inlet sealing 1x0.6
1 O-ring of the valve 2.5x0.65    



GAŠPARÍN CO2 MOTORS

Roy Hanson, Black Sheep Treasurer,
21410 Nashville St.
Chatsworth, California 91311
( 818 ) 718-1685

G 28BB
Volume: 28.70 mm3
Bore:2.85 mm
Stroke:4.5 mm
Power unit weight: 6.7 g with propeller
This engine has a fragile crankshaft.
Use as a "pusher" only.
The motor test results with tank 2ccm. Ta = 25 oC (77F)as measured at September 10, 1999. Charged with the cooling of tank. Original wood propeller JAS D123x90mm.

Operating Instructions for the GASPARIN G28 CO2 motor
NXa Average rpm for the first X minutes
Operating Instructions for the GASPARIN G28BBRV CO2 motor with RPM regulation
The GASPARIN G28BBRV is a motor designed for driving small and light slow fly models, or small scale models fitted with a radio or infrared control system. The G28BBRV has the RPM regulation valve in the cylinder head. RPM of the motor can be controlled by means of the smallest proportional servos.

The construction of the motor is based on the construction of the excellent motor GMW73 designed for driving FF models of the category CO2 FAI F1k and of a basic type of the motor G28BB without RPM regulation.

The motor is designed for a maximum use of the compressed CO2 energy from the flight tank featuring a volume of 2 ccm.
The construction of the motor has following characteristics:
  • Motor crankshaft is seated on two ball bearings
  • Connecting rod is made of brass for the purpose of better sliding capacities
  • The sealing O-ring of the piston features a small cross sections to prevent friction losses
  • The stroke of the motor is extended to 4.5 mm for a better use of compressed gas energy
  • By using the filling valve it is possible to discharge sharply the gas from the tank, thereby strongly undercool the tank for the purpose of the following highly efficient filling of the flight tank with liquid CO2 to a maximum level of 1.8 grams, which is 0.063 oz.
  • The RPM is controlled by the regulation valve lever. The useful range of lever position is in a range 60°. See enclosed drawings. The force necessary for the regulation of the lever is up to 2 grams.
  • The G28BBRV has a flat space above the piston, so the RPM should be set very carefully. See the "Starting and setting the speed" section for details.
The motor is designed for the work at medium revolutions 2500 to 3000 RPM with a supplied wooden propeller D125mm, 5 Inch, or with a similar propeller. The motor is suitable for driving models up to a weight of 20 grams, i.e. 0.7 oz, with a good sliding capacity. The properties of the motor are shown by the performance charts enclosed hereto.

Specification:
 
Bore 2.853 mm Stroke 4.5 mm
Volume 28.70 cmm Weight 6.9 g, 0.24 oz with propeller
The enclosed illustrations clearly show the construction of the motor.
The G28BBRV has been designed for higher efficiency in comparison with standard motors. Please, pay corresponding attention to its operation.

Filling the CO2 tank
When testing the motor, or testing a flying model, it is possible to fill the tank with a gas only charge. This provides a limited run of the motor. To achieve a "Gas" charge, hold the nozzle of the charger pointing up and the filler of the motor pointing down. In order to fill the tank with "Liquid" charge, keep the motor running for a longer time and then, reverse the procedure for the gas charge.
Maximum filling of the tank with liquid CO2 and with the undercooling of the tank
In order to achieve the highest flight performances of the models the filling with a liquid with the undercooling of the tank is used. It is possible to put up to 1.8 gram, which is 0.063 oz of liquid CO2 to a strongly undercooled tank of a volume of 2ccm. For the maximum filling you can use filling bombs of a larger volume up to 0.3 liters, the best options are 12-gram bombs used for sport shooting.
Filling procedure:
Starting and setting the speed
The motor is supplied with the revolutions set. The cylinders are secured with locking collars. The RPM regulation valve is set according to the enclosed drawing. Fill the tank and, making sure the motor is firmly secured, strike the tip of the propeller in the direction of rotation required. Do not try to stop the motor when running, as this can damage internal parts because of the level of torque generated. Do not turn the cylinder more than 1/4 turn from the original setting.

If you do wish to adjust the speed or dismantle the motor to repair parts or cure leaks, we suggest the following method: Lubricate the motor before testing. Unscrew the RPM regulation valve by a half of a turn from the lowest possible position. Loosen the locking collar in the cylinder and unscrew the cylinder so much, that the valve in the cylinder can close in compression stroke. After charging the tank, when the crankshaft is revolved, the cylinder is not working. Turn carefully the cylinder so that it can slide into the crankcase, and rotate the propeller as long as the piston pivot impacts the valve ball. Slide carefully the cylinder as long as the valve starts to open during the turning phase, and the gas force starts to operate onto the motor piston. Now screw in the cylinder slightly until the motor runs at final speed. Setting of the motor is completed by securing locking collar without upsetting the position of cylinders. Check whether the regulation valve is screwed out by a half of revolution from the lowest position. Try to rotate with the valve. Rotate the valve lever only within a range of 60° and follow the RPM regulation. By means of a change in the lever position towards the valve screw you will set the RPM regulation range required.

The suggested position of the regulation valve lever is according to the drawing, when the RPM increases when the lever moves forward.
IMPORTANT
DO NOT  attempt to operate the motor over medium revolutions of 4000 RPM using an oversize propeller as this could cause damage to the motor.
Beware of the situation  when any cylinder is screwed in too much that the piston in the power stroke cannot open the outlet openings. Full gas pressure in the piston blocks the motor run and this action is very dangerous for the O-rings of the motor pistons.

Motor Lubrication
It is essential to lubricate the motor between every 2-3 runs. Use special CO2 or sewing machine oil, light bicycle oil can be used. A syringe as used by diabetics makes a useful injector for the oil in the small quantities needed.
Connection
Before starting the motor for the first time, slightly check whether all the joints and pipe connections are tight. Loose connections can blow the seals when under pressure. Always empty all the gas from the motor after use.
Storage and Clearing
Before storing the motor for any length of time it is always best to clean and lubricate it.
Cleaning should be done with a soft brush using medicinal cleaning petrol or paraffin. Cleaning the lever of the regulation valve can be done by using a piece of soft balsa wood sharpened to a dull point. Lubricate after cleaning as described above. Motor, regulation valve and filling valve should be disassembled carefully above a suitable pad in order to avoid losses of small parts.

List of spare parts supplied together with the motor:
 
1 Nut for the propeller attachment 1 O-ring of the regulation valve 2.5x0.65
3 Screw of the motor attachment M1.2x8 1 Filling needle valve gasket
1 Ball of the cylinder valve D 1 2 O-ring of the piston 2x0.5
1 Ball of the filling valve D 1.5 1 O-ring of the tank 1.5x0.75
1 Cylinder head inlet sealing 0.5x0.25x1.2 1 O-ring of the cylinder head inlet sealing 1x0.6

I wish you much success and pleasure with your G28BBRV motor!


Gasparin CO2 motor, GMW 73  for models to 36" wingspan.
Also suitable for category FA1 F1k

The Gasparin GMW 73 is a special CO2 motor designed for the drive of sport aircraft models, including the regulations of the category FAI F1k.  The motor has been designed for maximum utilization of energy originating from the compressed CO2 in a flight tank of 3ccm, or larger.

The construction of the motor has following characteristics:
 


Basic technical characteristics:


GASPARIN GMW 73( CO2 model motor  )
Performance Data
Gasparin GMW-73 Twin
 
Basic technical characteristics: Now also available with speed control.

GASPARIN GMW 73T(CO2 model motor  )
Performance Data

Download performance diagram in Microsoft Word format

Operating Instructions for the GASPARIN G160 RV CO2 motor

The GASPARIN G160 RV is a robust and price affordable CO2 motor of a medium power output. The motor features a cylinder which is firmly screwed into the crankcase, and a simplified RPM regulation, carried out only by screwing the regulation valve in the cylinder head.

The consturction of the motor is based on the consttruction of the excellent motor GMW73 designed for driving the FF models of the category CO2 FA F1k.

The motor is designed for a maximum use of the compressed CO2 energy from the flight tank featuring a volume of 5ccm, possibly from larger tanks with capacities of 13 and 16ccm.

The construction of the motor has following charactreristics:

The motor is designed for the work at medium revolutions 1500 to 2000 RPM with a supplied propeller D180mm, 7 inch, or with a similar propeller. The motor is suitable for driving models up to a weight of 100 grams, i.e. 3.5 oz, with a good sliding capacity. The properties of the motor are shown by the performance charts enclosed hereto.


Specification:

Bore 5.0 mmStroke 8.0 mm
Volume 157 cmm Weight 21.5 g, 0.76 oz with propeller

The enclosed illustrations clearly show the construction of the motor.
The G160 RV has been designed for higher efficiency in comparison with standard motors. Please, pay appropriate attention to its operation.

Filling the CO2 tank

When testing the motor, or testing a flying model, it is possible to fill the tank with a gas-only charge.This provides a limited run of the motor. To achieve a "Gas" charge, hold the nozzle of the charger pointing up and the filler of the motor pointing down. To fill the tank with a "Liquid" charge, therefore give a longer motor run, reversing the procedure for the gas charge.

Maximum filling of the tank with liquid CO2 and with the undercooling of the tank

In order to achieve the highest flight performances of the models, the filling with a liquid with the undercooling of the tank is used. It is possible to put up to 5.0 gram, i.e. 0.0176 oz of liquid CO2 to a strongly undercooled tank of a volume of 5ccm. For the maximum filling you can use filling bombs of a larger volume up to 0.3 liters, the best possibility are 12-gram bombs used for sport shooting.

Filling procedure:

Starting and setting the speed

The motors are supplied with the revolutions set. Their cylinders are firmly screwed into the crank case. Fill the tank and, making sure the motor is firmly secured, strike the tip of the propeller in the direction of the rotation required. By rotating the red control ring above the cylinder head it is possible to try the extent of the RPM control of a running motor. Do not try to stop the motor when running, because of the level of torque generated, this could damage internal parts. If you do wish to adjust the speed or dismantle the motor to repair parts or cure leaks, we suggest the following method: Lubricate the motor before testing. Unscrew the cylinder valve with the red control ring in such a way that there can be a space of approximately 1.5 mm between the lower edge of the ring and the cylinder head. After charging the tank, when the crankshaft is revolved, the cylinder is not working. Now screw the regulation valve in the cylinder slightly until the motor runs at final speed.

IMPORTANT
DO NOT attempt to operate the motor over medium revolutions of 3000 RPM using an oversize propeller only up to a diameter of 240mm, i.e. 9.5 inch as this could cause damage to the motor.
Beware of the situation when the screw of the regulation valve of the cylinder is screwed too deep.

Motor Lubrication

It is essential to lubricate the motor between each 2-3 runs. Use special CO2 or sewing machine oil, light bicycle oil can be used as well. A syringe as used by diabetics makes a useful injector for the oil in the small quantities needed.

Connection

Before starting the motor for the first time, lightly check whether all the joints and pipe connections are tight. Loose connections can blow the seals when under pressure.
Always empty all the gas from the motor after use.

Storage and Cleaning

Before storing the motor for any length of time it is always desirable to clean and lubricate it.

Cleaning should be done with a soft brush using medicinal clean petrol or paraffin. Cleaning the cylinder head valve can be done by using a piece of soft balsa wood sharpened to a dull point. Do not enlarge the hole in the cylinder head valve as this will allow the ball to drop through and prevent that cylinder from working. Lubricate after cleansing as describe above. Motor and filling valve should be disassembled carefully above a suitable pad in order to avoid losses of small parts.

List of spare parts supplied together with the motor:

1 Screw for the propeller attachment M2x16 1 O-ring of the regulation valve 3x1
3 Screws of the motor attachment M1.6x6 1 O-ring of the piston 3x1
3 Nut of the motor attachment M1.6 1 Ball of the filling valve D 1.5
1 Ball of the cylinder valve D 1.5 1 Filling valve gasket
1 O-ring of the cylinder head inlet sealing 0.74x1.02    



GAŠPARÍN CO2 MOTORS

Roy Hanson, Black Sheep Treasurer,
21410 Nashville St.
Chatsworth, California 91311
( 818 ) 718-1685

G 160RV
Volume: 157 mm3
Bore:Ø5.0 mm
Stroke:8.0 mm
Power unit weight: 21.5 g with propeller

The motor test results with tank 5ccm Ta= 22ºC (71.6F) as measured at July 22, 2000. Charged from 12 g charger with the cooling of tank Original propeller Modela D 180mm, 7inch.


NXa Average rpm for the first X minutes

I wish you much success and pleasure with your G160 RV motor!




24 hour message machine:
(818 ) 718-1685
OR WRITE
Roy E. Hanson Jr.
21410 Nashville Street
Chatsworth, CA 91311

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