Flush Fuel Vent
The JMP FV-1 Flush Fuel Vent System
begins with the main threaded fitting. A 3/8” hole is drilled into the
fuselage and the threaded fitting is secured with the 3/8” washer and
panel nut. There are two sizes of fuel line choices for the vent line,
either 3/16” or 1/8” ID. This fuel system vent line attaches the
internal right angle fitting to the main fuel tank vent. If you are
using the FV-6 Forward Facing Vent, or, “scoop”, time the two mount
holes of the threaded fitting to point the “scoop” forward.
The FV-6 Forward Facing Vent, or
“scoop” is screwed to the main chassis with (2) #2-56x3/32 socket head
cap screws. This “scoop” is usually installed if there is excessive
fuel exiting the main fuel tank vent line. This residual fuel on the
fuselage is often caused by aggressive flying including inverted pushing
maneuvers. Sometimes, the fuselage boundary layer near the external
vent can also cause fuel to exit the Flush Fuel Vent. The FV-6
Scoop/Vent may help eliminate this problem. However, the FV-6 Scoop/Vent
will make the attachment to the Overflow Tank difficult.
The FV-2 Magnetic Fitting Assembly is
available to attach the overflow tank line to the FV-1 Flush Fuel
If your flying style is very
aggressive, a catch tank will stop vent line fuel from spraying out onto
the rear fuselage.
is a magnetic plug and flag that can be inserted during model transport
to prevent fuel leakage.
Overflow Tank ………….. 60.00
Our new style Overflow Tank can
receive the Magnetic Probe once disconnected from the model’s Flush Fuel
JMP External Fueling Assembly
The JMP External Fueling Assembly
EFA-1 allows a neat filling port on the side of the fuselage. An
interior manual ball valve attaches to the Air Trap Fill/Drain port,
eliminating the standard Air Trap Blocking Plug.
This assembly requires the FV-2
magnetic fueling probe that inserts into the flush fitting on the side
of the fuselage. Just insert the magnetic fueling probe, open the manual
ball valve, fill the fuel tanks and shut-off the manual ball valve. Then
disconnect the magnetic fueling probe.
Molded Offset Gear
have finished the molds for our new Offset Hinges. These hinges are
beautifully molded from high quality fiber filled plastic. All part
design, material and molding are done here in the United States.
The three sizes of Offset Hinges begin with the ½” pivot length, which
is the same as the molded size of the past. The middle size has a ¾”
pivot length. The large size has a 1” pivot length. The hinge axles are
alloy steel and each set includes two mounting pads.
Current models with large doors can be improved with these parts along
with many other in our expanding line of accessories. Sold 6 per pack.
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
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.
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.
Brake Valve Plus
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
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
Brake Valve Plus Retract Valve
Brake Valve Plus Retract and Door
PCU V-2 FRAMES
(Valves and Servos not
PCU V-2 Frame for Brake Valve Plus 1
PCU V-2 Frame for Brake Valve Plus 2
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.
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.
Machined Gear/Door Manifold
All air lines for as many as three
retract gear cylinders and three to six gear door cylinders can be
attached to the Retract/Door Manifold. For example: Six individual air
lines coming from the three retract gear cylinders can be attached to
the manifold. Just decide which row of the captive nut fittings will be
the retract gear up lines. The other row of captive nut fittings will be
the retract gear down lines. The captive nut fittings on the front edge
of the manifold will be power to the gear up and gear down rows of
fittings. The other two rows of the smaller hose barb type fittings are
attach points for the gear door cylinders.
The Retract/Door Manifold should
eliminate most of the T-fittings which mess up installations and cause
pressure drops throughout the system. The manifold is usually mounted
near the central and lower part of the model or to the bottom of the
fuselage. All lines from the retract gear cylinders and gear door
cylinders will attach to the Retract/Door Manifold. In more complex
installations with multiple gear door cylinders there can be as many as
18 individual air lines. Once organized and neatly attached to the
fuselage and the manifold, these 18 air lines are now only 4 air lines
of sometimes referred to as 4 circuits (Gear Up, Gear Down, Doors Up and
Doors Down). These 4 air lines will pass upward and attach to the
operating valves on the control board.
Shown in the photo the Manifold has 3
sets of retract gear cylinder fittings that are 4mm.
There are also 6 sets of 1/8” fittings
for the gear door cylinders. Just about any number of attach fittings
and air line sizes can be ordered.
We have several Retract Gear, Gear
Door and Brake operating valve choices available along with a great Door
V-2 Fill Panel
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
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
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
3/8" I.D. x Eight Stroke Lengths
.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
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.
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.
Valves are perfectly machined and carefully assembled with each one
required to pass a “bubble tight” leak check.
is a very compact Connecting Link to finish the servo to Hex Valve
Hex Valve.....63.00 Connecting Link.....15.00
Shut Off Valve and Machined 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
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.
in 4 sizes and 2 mounting options!
Please specify when ordering:
Horizontal Mount-1.5”x 3.25”-2.9 ozs................ 127.112
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
Vertical Mount-1.75” x 3.75”-4.66 ozs............ 100.72
Horizontal Mount-2.25”x 4”-8.8 ozs................... 171.71
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
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
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
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
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.
1-Way Fill Valve 39.00
Tapered Fill Adaptor
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.
Fuel Tank Fittings
NOW AVAILABLE FOR 1/8" I.D.
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.
LARGE 50.00 /
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
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.
VENT OVERFLOW TANK 55.00
JMP’s HUSTLER 100 oz. CENTER
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
Please visit the "Accessories" page for more great products.