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Brake Valve

The JMP Brake Valve is produced in two versions. The first is a stand alone design. The second version as part of the JMP Multi Spool Block Valve. The Brake Valve plus 1-Circuit Block Valve would normally be used for models with retract gear and brakes. The Brake Valve plus 2- Circuit Block Valve is for models that have brakes, retract gear and gear doors. Any of these valves can be mounted directly to the control board or used with our PCU-V2 frames which also include a manifold for the gear and door air lines.

The size of the JMP Brake Valve is 2”x 7/8” x ½”. The height is designed to line up with a JR 8711HV servo. Just use our Zero-Flex grommets and the standard JR two side control arm.  Also available is a machined attach link to keep the install as compact as possible.

Connect the brake air supply line to the “Air In” side elbow fitting and the “Air Out” fitting on the lower side of the valve to the wheel brakes. When the push rod is fully depressed, full system pressure will be delivered to the brakes. When the push rod is fully extended, the pressure to the wheel brakes is zero.

$92.00

Brake Valve Plus Retract Valve

Brake Valve Plus Retract and Door Valve

Here are JMP's new Brake Valves plus 1-Circuit Retract Valve and our Brake Valve plus 2-Circuit Retract/Door Valve.   The Proportional Brake Valve will activate most wheel brake designs in use today.  To work best your Brake servo should have at least 100 in.oz. of torque. We use a JR 8711HV servo for this. The Brake Valve requires about .5 inches of stroke to operate from zero to full system pressure. Lesser servos will work but will buzz more when applying maximum braking. As you increase the system pressure, it requires progressively more servo torque to deliver this pressure to the wheel brakes.  

The gear and door spools are our standard Hi-Flow design with the gear circuit using machined fittings and aluminum air line locknuts. Just set servo end points to push the spools from end stop to end stop to retract the gear or close the doors.

We have several fitting sizes available for custom installations. The stock setup uses 1/8" air line fittings on the Brake Valve circuit. The Door circuit uses 1/8" fittings. The Retract Gear circuit uses 4mm fittings with air line locknuts.

Brake Valve Plus Retract Valve         $155.00

Brake Valve Plus Retract and Door Valve      $185.00

PCU V-2 FRAMES

(Valves and Servos not Included)

PCU V-2 Frame for Brake Valve Plus 1 Circuit      $270.00

PCU V-2 Frame for Brake Valve Plus 2 Circuits      $340.00

The JMP PCU-V2 or Pneumatic Control Unit is designed to control the brakes, retract gear cylinders and landing gear door cylinders of the most complex r/c model aircraft. The goal of the PCU is to eliminate the complexity and disorganized nature of model pneumatic systems. Most installations have many t-fittings which cause unavoidable pressure drops across the entire system. This is eliminated with the PCU. Also included with the PCU are our Machined Servo Connecting Links. These can also be ordered separately for use with our Brake Valve, 2-Circuit Block Valve and 3-Circuit Block Valve. The overall size of the completed PCU-V2 is 7.0” in length and 2.6” in width.  

Either standard 1/8” OD or 4mm fittings with aluminum lock nuts can be ordered. Large models with increasing air cylinder diameters often now use 4mm size air lines. When ordering, let us know the number of retract gear cylinders and gear door cylinders.  The proper fittings will then be installed. Unused ports on the PCU lower side manifold can be plugged, but changed later for some other model with different cylinder counts. Many combinations of fittings and control possibilities can be imagined.

V-2 Fill Panel

Checkout our JMP Fill Panels in either 2-Circuit or 3-Circuit designs. These fill panels come with precision 1-Way Fill Valves and air gauges. A neat front panel and a machined mounting plate attach the Fill Panel to the model. Normally, our Tapered Filling Adapter is used with our 1-way fill valve.  Also available is a 1-Way Valve with a screw in fill fitting.

2 Circuit Fill Panel    $289.00

3 Circuit Fill Panel     $378.00

Professional Series Air Tanks

ALL 4 SIZES NOW IN STOCK!!!

JMP’s Professional Series Air Tanks come in four sizes:

230 ml-Small……………….$35.00      360 ml-Medium……………$36.00

700 ml-Large……………….$37.00      1000 ml-Extra Large…….$40.00

 All of these Air Tank sizes can be ordered with installed fittings as follows:

 Straight fitting: 1/8” or 4mm air line

90 degree fitting: 1/8” or 4mm air line

T-fitting: 1/8” or 4mm air line

The extra large size has nearly half again more volume than the standard large tanks currently in use.

The Air Tanks assembled with 90 degree fittings are used when installations have no clearance in the front. T-fittings are used when multiple Air Tanks are installed or when using an air gauge.

Our Air Tank fittings are machined to maximize compressed air flow rates, and include a clamping nut to eliminate air line blow off. All assembly which includes lid crimping, permanent sealing of the fittings, and leak checking is performed at JMP.

 Make JMP your first choice for quality accessories in all your modeling projects.     

JMP Door Cylinders

3/8" I.D. x Eight Stroke Lengths

                                     Cylinder Pricing:

                                  .5" Stroke......39.50    1" Stroke......41.00

                                1.5" Stroke......42.50    2" Stroke......44.00

                                2.5" Stroke......45.50    3" Stroke......47.00

                                3.5" Stroke......48.50    4" Stroke......50.00

Used for years by quality minded modelers, the JMP Door Cylinder is now available in eight stroke lengths. These door cylinders are perfectly machined and carefully assembled with each one required to pass a “bubble tight” leak check.

They are designed with a precision fixed orifice that stops the “snap action” and door slamming of other styles while eliminating the additional cost of separate restrictors. The piston rod has 4-40 thread for Quik-Link, Rocket City or ball link attach points.

Available in 1/2" increments from .5” of stroke length through 4” of stroke length.

Also, pictured below is the 1” stroke length cylinder with the custom machined cylinder pivot post for secure mounting. The pivot post fits every cylinder length.

Pivot Post......8.00

2-way Retract Hex Valve

JMP’s new 2-way Hex Valve is now available. This servo controlled valve features six output fittings which will directly operate a common three air cylinder retract system.  The Hex Valve will often eliminate most or all of the T-fittings. The spool design has definite end stops which eliminates over travel. This is the highest flow retract cylinder operating valve available and can be ordered with hose barbs for 1/16” i.d. air line or 4mm air line.

These Hex Valves are perfectly machined and carefully assembled with each one required to pass a “bubble tight” leak check.

Also available is a very compact Connecting Link to finish the servo to Hex Valve connection.

Hex Valve.....63.00    Connecting Link.....15.00

Shut Off Valve and Machined Mount

Complete Assembly.....45.00     Mount Only.....25.00

The mount securely holds the shut off valve to the model jet’s control board. Locate the shut off valve between the pump and the turbine engine. The Machined Mount can be purchased alone or with the shut off valve.

JMP Air Trap

Four sizes in either vertical or horizontal style are now available.

The JMP Air Trap uses a proprietary fiber membrane to filter fuel to 10 microns and virtually eliminate air from entering the final fuel pump suction line. Smoke systems are also improved with use of the Air Trap. This design is extremely robust with properly designed end caps that deal with positive and negative pressures often found during fast fuel filling and draining. The JMP Air Trap comes completely assembled, leak checked, and ready for installation.

The Air Trap has positions for two “Fuel In” hose barb fittings that can be used for twin main fuel tanks. One of these “Fuel In” fittings can be blocked if there is a single main fuel tank requiring only one fuel inlet fitting.  A center hose barb fitting attaches to the fuel filter membrane. This is the “Fuel Out” position which delivers fuel to the turbine fuel pump.  Also, a drain/fill line is provided.

Hose Barb Fittings: The JMP Air Trap is available with hose barbs to fit either 1/8” i.d. or 3/16” i.d. tubing sizes. Many combinations of the two are also possible.  

Construction: The Air Trap is constructed from aircraft grade aluminum and the finest West Systems Epoxy with a main body that is translucent. It is easy to visually check for system air leaks and overall fuel system performance.

Proper Filling: The fitting with the smaller hole is for the fueling/de-fueling line. Do not allow any air to enter this line when removing the fill line from the fueling station. Fold this fill line over in your hand when the tanks are full and install the plug. Very little air should show in the Air Trap when the fuel tanks are completely full.

Proper Operation: Typical clunk style fuel systems found in model jets do not deliver fuel perfectly, especially when the model fuel tanks are near empty. Some air is normal to see in the Air Trap. An amount of air that would leave the Air Trap half full is not good. Either the main fuel tanks were run very low or there may be a leak upstream in the fuel system. This should be checked out.

Proper Orientation: The vertical design Air Traps are normally mounted straight up and bolted to the model control board. The horizontal design Air Traps are normally mounted with the mounting tabs bolted down to the model control board. On the horizontal design, this keeps the “Fuel In” fitting to the top. If you decide to mount the horizontal design Air Trap upside down to the bottom of the model control board, you must reverse the “Fuel In” fitting and the “Drain/Fill” hose barb fittings. Drain/Fill must always happen from the lower side of the Air Trap. Just remember that air in the system must be forced up and out during the filling cycle leaving the Air Trap completely full of fuel.

                  Available in 4 sizes and 2 mounting options!

        Please specify when ordering:                                       Introductory Price

          ___ Small Horizontal Mount-1.5”x 3.25”-2.9 ozs................ 127.112    

          ___ Small Vertical Mount-1.5” x 3.25”-2.9 ozs..................... 99.28

          ___ Medium Horizontal Mount-1.75” x 3.75”-4.66 ozs........ 129.04

          ___ Medium Vertical Mount-1.75” x 3.75”-4.66 ozs............ 100.72

          ___ Large Horizontal Mount-2.25”x 4”-8.8 ozs................... 171.71

          ___ Large Vertical Mount-2.25”x 4”-8.8 ozs....................... 133.31

          ___ Extra Large Horizontal Mount-3”x 5”-19.5 ozs............. 183.11

          ___ Extra Large Vertical Mount-3”x 5”-19.5 ozs................. 145.79

      Choose one option for each fuel line:

       1. Number of “Fuel In” hose fittings 1___or 2___

      2. Size of “Fuel In” hose fittings 1/8”___or 3/16”___

      3. Size of “Fuel Out to Pump” hose fittings 1/8”___or 3/16”___

      4. Size of “Fuel/De-Fuel” hose fitting and fuel line plug 1/8”___ or 3/16”___

Pneumatic Control Unit-PCU

The JMP Pneumatic Control Unit is designed to control the brakes, retract gear cylinders and landing gear door cylinders of the most complex r/c model aircraft. The goal of the PCU is to eliminate the complexity and disorganized nature of model pneumatic systems. Most installations have many t-fittings which cause unavoidable pressure drops across the entire system. This is eliminated with the PCU. Also included with the PCU are individual servo linkages and quality 1” readable pressure gauges for each of the three air circuits. The overall size of the completed PCU is 5.5” in length and 3.5” in width. From the top face of the gauges to the bottom edge of the brake servo it is 2.0” tall.  

Either standard 1/8” OD or 4mm fittings can be ordered. Large models with increasing air cylinder diameters often now use 4mm size air lines. When ordering, let us know the number of retract gear cylinders and gear door cylinders and the proper fittings will be installed. Additional unused ports on the PCU lower side manifold are plugged, but can be changed later for some other model with different cylinder counts. Many combinations of fittings and control possibilities can be imagined.

The PCU can use three individual air supplies which will divide the retract gear, gear doors and main wheel brakes into separate air circuits. A manifold air fitting point for the JMP Failsafe Sequencer is also provided. This Sequencer senses a low air supply in the retract gear air circuit and shifts the retract gear and gear doors to the down position. Robust servos control the High Flow 2-Way Valves and proportional Brake Control Valve.  Precision 1-Way Fill Valves are mounted to the PCU and feature a very neat and quick Tapered Filling Adapter. Also available is a more standard 1-Way Valve with a screw in fill fitting.

Single point control units have been available for some time. Their miniature control valves are fragile and unreliable. These valves are controlled by very weak actuators. Difficult and painful programming is found on nearly every one of these units. They are also produced offshore with no real way to deal with manufacturing and programming problems. Multiple manifold type air line attach points are not found on these digital type units. The “Old School” nature of the PCU makes it easy to use and deals directly with air line and plumbing challenges found in easy to complex models.

PCU 549.00

2-Way Valve 59.95

The new JMP 2-Way valve is the finest and most robust servo controlled valve built for RC models. The spool design uses quad seals with definite end stops. Its vertical design allows the air lines to remain hidden. It is truly a high flow valve and may be ordered with hose barbs for 1/16" i.d. air line or 4mm air line.

The new JMP 1-Way Fill Valve is a precision machined check valve. It uses a checking concept found in expensive demanding aerospace equipment. Mounts to the model's control board using a washer and nut. The JMP Tapered Fill Adaptor provides easy connect and disconnect to the air supply. Available with hose barbs for 1/16" i.d. air line or 4mm air line.

NEW  JMP 1-Way Fill Valve 39.00

Tapered Fill Adaptor

20.00

A simple but effective way to couple your air pump to the 1-Way Fill Valve. Just push the tapered nylon fitting into the valve to create a temporary seal. The air line automatically recoils, stays neat and out of the way.

Large Fuel Tank Fittings

These large fuel fittings are designed to minimize tank and pump pressures during fueling-defueling and running of the turbine. For 3/16" I.D. Tygon fuel tubing.

50.00 / Set

Machined arms and mounts are available for the HiTec 5755 metal gear servo. These parts are designed for heavy-duty applications requiring power and holding strength. The servos are somewhat larger than standard sizes and feature an extremely large and tough gear set.

          MACHINED SERVO ARM....... 75.00   0-FLEX MOUNTS......25.00 

This new twin vent overflow tank is designed for models with one or two fuel vents. The extra-large fuel fittings and tubing help to lower the pressure caused by fueling at a high rate.  

TWIN VENT OVERFLOW TANK 55.00

JMP’s HUSTLER 100 oz. CENTER FUEL/SMOKE TANK

This custom fiberglass tank will deliver either turbine engine fuel or smoke fuel engine. A JMP Accumulator is embedded into the tank to save valuable fuselage space and deliver a bubble free fuel supply to the engine or smoke pump. The center baffle controls rapid fuel weight shift. A machined aluminum truss provides for easy mounting in the Hustler airframe or other similar model designs. This JMP fuel tank comes fully assembled and leak tested for the perfect fuel delivery system.

SMOKE TANK     250.00