RCU Review: JR JR Venture CP - 32

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    Contributed by: Jim Langley | Published: October 2002 | Views: 46501 | email icon Email this Article | PDFpdf icon

    Model Name: JR Venture CP

    Rotor Size : 49.5" (550mm)

    Length: 44.6'

    Flying Weight Tested: 7lbs

    Engine Used: Webra 35 Black Head

    Radio Used: JR 8103DT

    Gyro Used: Futaba GY-401

    Receiver: Hitec Supreme 8

    Servos: HS-525 (cyclic), 9253 (tail), HS-225 (throttle)

    Channels Used: 6

    Manufacturer: JR Heli Division

    Distributor: Horizon Hobby

    JR Venture

    by Jim Langley (pequeajim)

    • ARF pre-assembly is very complete
    • Head and control system are assembled and installed with links
    • Push rods are done up and ready for install
    • Full bearings
    • CCPM control system with 20+ degrees of collective. 3-servo 120 degree mode
    • Large canopy that is very easy to see
    • Very quick from box to flight
    • Slightly heavier than most 30 Helis

    • Wooden mains, covering separates (see text for JR update)

    • Front mount tank causes CG changes as fuel consumed


    Boy, was I excited about getting this Venture. A 15 minute conversation with Kurt at Heliproz, and I knew just what to order. The Venture is the first serious competition for the Raptor in the past two years. JR had their hands full in trying to design a helicopter that incorporated the latest advancements in mixing, frame design and ease of construction. From the conversation floating around the forums, it looks like they did a great job!

    The day finally came when the brown truck made a visit to my house. After flipping my dog a chew bone, Mr. UPS handed me the box and I quickly ran into the house to tear it open. I have been flying helis for a year, and have assembled a few, but have not been this excited since I bought my first Raptor.

    The Venture is packaged in a nice size box, (remember this is an ARF), with a cool looking picture on the side and all components reinforced in their compartment, well protected from the shipping demons. I quickly tore it open to pull out the parts. My first impression was that there was not a lot of work to do to get this heli in the air. In fact, it actually took me more time to break the engine in on a test stand than to assemble the bird!

    When you open the Venture box you are presented with a heli that should require four to five hours to complete, and possibly a little more if this is your first helicopter.

    Kit Includes

    The entire frame assembly is built for you, including the control system and main rotor head. JR even installed all of the linkage rods.

    NOTE: Be forewarned that the heli is setup from the factory for a beginner. To achieve the full range of positive and negative pitch, you will need to adjust the length of the seesaw arms. This is illustrated in Section 4-11 of the manual.

    The tail boom and rotor is completely assembled. The fuel tank is installed and ready to hook up to your engine or header tank, although I would advise replacing the klunk tubing with something a little more resistant. The landing gear struts (installed) are attached with rubber type mounts. There is an installed cooling shroud with easily enough room to fit a 50 size engine.

    The clutch and start shaft assembly is like other JR helicopters and supports a 6mm Raptor type start shaft. The flywheel is relieved for the clutch shoes and it can be installed in two directions to minimize runout. The supplied wooden 550mm blades use 4mm mounting bolts, but you will have to use spacers if you want to use your 12mm blades as the JR blade grips are 14mm.

    The heli comes with two flybar configurations, beginner (the default), and advanced. Although not a full 3D pilot, I also did not consider myself a beginner so I opted for the advanced setup.

    The supplied manual is typical JR, and is very detailed with tons of pictures and drawings to make things very clear. Some of the programming instructions are misleading, but I hear that JR has changed this, so you should be in good shape for all Ventures purchased now.

    Required Items

    This will be a short list as the Venture only requires an Engine, (I used the Webra 35 Black Head), Mavrikk Muffler, five servos, receiver, gyro and battery.

    I used Hitec HS-525s on the aileron, elevator and collective, Hitec HS-225 on the throttle, and a Futaba S9253 on the tail. The transmitter used was a JR 8103DT

    Reviewed Upgrades

    The Venture files terrific right out of the box and comes with a full set of bearings, however, I asked around to see if there was ANYTHING that I could add to this helicopter to make it better. I did find a set of KSJ thrust bearings that I installed which help to eliminate a tiny bit of slop in an already tight rotor head assembly. I also installed a fuel filter, header tank, and 550mm carbon blades.

    Finally, although the supplied boom support is adequate, it does not allow you to use a long glow driver when starting your heli as it gets in the way. The frame already comes with two booms support mounts, so I purchased two supports from Heliproz, and now I don't need a remote adapter. I just use my long glow driver and plug it right in!


    Attaching the tail brace is simple and only takes about 10 minutes.

    I used two boom supports to help in gaining rear access to the engine glow plug.

    Tail Boom Installation

    The tail boom is completely assembled with the exception of the horizontal and vertical fins. First sight down the boom and look at the belt to be sure it is not twisted. Attach the boom with the supplied (4) 3x15mm socket head bolts which are conveniently installed. Do not tighten them all the way for now. You will need to turn the belt 90 degrees clockwise before installing it over the front pulley. Check the belt tension by following the instructions on page 8 in the manual. Tighten the 3x3mm set screws equally to keep the boom straight and then tighten the 4 socket head bolts

    Next, you will attach the tail brace to the tail brace clamp and rear of the frame. If you are using two tail braces, the ends attach on the outside of the clamp with a couple of thick washers for support. Attach the other ends to the frames as shown in the picture on the right. JR designed dual boom supports into the frame already which works great!

    Now install the vertical tail fin as per the instructions. Use CA on the self tapping socket head bolts. Since the tail rotor assembly is already installed for you, this is a very easy task, and you don't have to worry about alignment.

    When assembling the rotor control rod, initially, I thought the JR guides were a real pain, but after installing them, I can see how they are very well thought out and versatile. This little gadget allows you to adjust rotation, distance from the boom and location along the boom as well as clamping it in place. No more sliding control rod guides, or using CA to hold them in place. Install the tail control rod bushings, screw on the universal link, and attach the three control guides. First check for friction and adjust the rotation of each guide to minimize this. Now snap the universal link on the tail rotor ball link and repeat the procedure. I had to put a very slight bend in the control rod about three inches from the tail to keep this smooth. Finally, attach the other universal link and do a final check to minimize friction.

    NOTE: It is VERY important to minimize as much friction during the control rod installation as you can. This will give you a fast tail response and reduce the amount of work your tail rotor servo has to do. Less work, better gyro holding!

    The Webra, (shown with clutch, fan and mounting block), is an extremely powerful engine for it's size.

    The engine, (shown with a Hatori muffler), fits perfectly with plenty of room.

    I used a 2 oz. header tank. Make sure you keep it somewhat level with the carb on the engine.

    Engine Installation

    The Venture will fly with any .32 - 39 sized heli engine, however, because of it's size and weight, you might want to consider one of the larger engines in the .35 - .39 range. The OS .32 just doesn't have enough power to fly this bird with authority. I chose the Webra .35 black head because of it's raw power and light weight. Remember, the red head is low nitro and black is high nitro, (15% - 30%).

    Note: The Webra engines require a longer break-in time. I ran mine in on a test stand with a 10 x 6 prop for a half gallon before mounting it in the heli.

    The engine is oriented with the head facing the back so you will need a right hand muffler, (looking from the tail forward). Since my Raptor muffler would not work, I picked up a Mavrikk 30 sized muffler. What a great value at 30 bucks!

    The cooling fan and clutch are easy to attach, but you will need to read the addendum in the manual to properly set the orientation of the engine mounting block. The base instructions are backwards. Be sure to use threadlock where noted in the manual.

    Now mount the starter shaft locking in place with the supplied 4mm set screw.

    When you mount the engine, we sure to slide the muffler mounting screws into the engine case as you will not be able to do so with the bottom screw once the engine is in place because of the way the frame is oriented.

    The bottom of the clutch should align flush with the bottom of the clutch bell.

    Attach the fuel and pressure lines as outlined in the manual You should use a good quality filter that can be cleaned periodically. I used a 2 oz. header tank attached to the rear part of the frame. Make sure you keep it somewhat level with the engine carburetor.

    With CCPM, make sure you center all servo arms perpendicular to the control rod.

    Servo Installation

    The Venture requires 5 servos for operation. Although it in not necessary to use digitals, it is important to use the same type of servos on the three cyclic, collective and pitch controls. With 120 degree CCPM, the swashplate servos work together to control cyclic and collective functions instead of using a separate servo for each. Since the servos work together, you won't have to use expensive digital or super servos. JR did a nice job with the placement of the radio system, tucking the servos away into the body so that they are well protected.

    You will use the supplied 12mm screws and washers to mount the servos. Each servo body should be snug with no movement. Be sure to route all servo wires so that they are isolated away from the sharp edges of the helicopter's mechanics, (gears control rods, etc.). Mount the switch harness before you install the rudder servo. This will make it's installation easier.

    There's plenty of room in a nicely designed area for your electronics.

    Put the voltwatch in this spot where it can be seen through a cutout in the canopy.

    Gyro/Receiver/Switch Harness/Battery Installation

    The Venture provides a nice layout for the installation of the electronics. The instructions show the battery pack wrapped in foam and slid into a battery tray. I used an 1800 NiCad pack which provided a snug fit. The receiver, once wrapped in foam fits easily on the shelf above the battery and can be oriented with the connectors to the front or side, there's plenty of room. I used Velcro and rubber bands to hold it down as the tray has small tabs that you can wrap the bands around, nice!

    The large flat area just in front of the elevator arm linkage is perfect for the gyro. Be sure to use the double sided tape provided by the manufacturer, and make sure the surface is clean and free from oils. I used a Futaba GY-401, and it fit with plenty of room to spare.

    Lastly, attach the switch harness and use the provided rubber grommets to provide a little stress relief. If you find that you mounting screws are too short, then skip the grommets.

    I used a Hitec 8 channel receiver and installed the servos as follows:

    Gyro Sensitivity

    JR provides some clear wire wrap for keeping the servo wires neat and out of the way. Use it as it makes life easier, looks neat, and keeps the wires away from the moving parts.

    The Venture looks great decked out with the supplied decals.

    Final Touches

    JR Provides some nice looking decals to trim your large Venture canopy with. Wash the canopy with hot soapy water before applying the decals. Trim the windshield and install it using the supplied self tapping screws.

    My only disappointment with the Venture was with the blades. The set that I received were pretty far out of balance and only good for spinning the heli up to hover and check things out. Don't get me wrong, they are more than adequate to perform minor aerobatics, but not much more. Plus, the ends of the covering started to split after 10 flights. If I had not seen comments about this on RCU, it could have been a very bad situation for me if this happened in flight. Check yours every flight and then get a set of carbon or light glass blades.

    (Editors note regarding blades: JR has corrected this problem. For Venture owners that experience this problem, they can call JR's customer service department for a free replacement set. Also, these rotor blades were never really intented for aerobatic performance, but more as a low cost replacement for the learning pilot. More advanced pilots will most likely use composite blades rather than the stock wood. )

    Make sure your blades are balanced and tracking properly. This is the major cause of vibration in ALL helicopters and is also the easiest to fix.

    120 Degree CCPM uses three servos for aileron, elevator and pitch


    The JR 120° CCPM or Cyclic/Collective Pitch Mixing, provides a control system that gives the same control inputs as a single servo standard system, but with increased precision and reduced complexity. Like the single servo system, the JR CCPM system uses three servos for the three main controls: aileron (roll), elevator(pitch) and collective. The CCPM lower swashplate ring is designed with only three control balls, spaced at 120° from each other, thus the 120° CCPM designation. Even though the control balls are not at 90° as in the standard system, the aileron (roll) axis is still parallel to the main mechanics of the helicopter, and the elevator (pitch) axis still functions at 90° to the mechanics like a single servo system.

    The biggest difference in the way that these two systems operate is that unlike the single servo system where the three servos work completely independent from each other, CCPM servos work together to achieve the same control inputs. For example, if an aileron (roll) input is given, two servos work together to move the swashplate left and right. If elevator (pitch) input is given, all three servos work together to move the swashplate fore and aft. For collective, it?s also the strength of three servos that will move the swashplate up and down the main rotor shaft. With two to three servos working at the same time during any given control input, servo torque is maximized and servo centering is also increased. In addition to these benefits, CCPM achieves these control responses without the need for complex mechanical mixing systems that require many more control rods and parts to set up.

    CCPM is preprogrammed into many of today's radio systems. Since the 120° CCPM function is preprogrammed, CCPM is no more complicated to set up than a conventional single servo
    standard system.

    The manual comes with instructions for programming, (all JR radios, of course) and the way they explain things can be a bit confusing. Stick with it and ask for help if you do not understand. Horizon support is terrific and you will find many users on the RCU forums willing to help.


    Ready to go. Note the Revolution base loaded antenna.

    Flight Test

    The time came to try this birdie out and I was pumped. I checked all of the linkages, connections and fueled her up. I used 15% Cool Power heli fuel with an OS #8 plug.

    After starting the engine, I allowed the blades to spin up slowly and watched for anything that might be out of wack. Not seeing anything, I slowly lifted the heli up to check my gyro and servo direction and the GY-401 was setup perfectly.

    All that was left was to lift off, so I did and was pleasantly surprised of the stability of this heli over other 30 size ships that I have flown. A little forward flight was smooth with a very slight tendency to pitch up when coming out of a turn.

    You do have to pay attention to the elevator trim as the CG shifts slightly as the fuel burns off in the front mounted tank, but this is not really a concern.

    After four flights, I switched to carbon mains and wrung the heli out a little. Even though the Venture is a bit heavier than my Raptor, the Webra responds instantly and pulls the heli through maneuvers with no problem.

    Flips, rolls and loops are executed with ease, however multiple flips will start to bog the engine down. Perhaps when the Webra is broken in, it will perform better. Inverted flight proved to be pretty easy though I am not good enough to get it down close enough to cut the grass. I save that for my lawn mower!

    This helicopter is sized for a larger engine. Every time I pick it up, it screams for a .50 which would be very easy to install. There have been multiple discussions on the boards with folks that have converted the heli with the Ergo 46 conversion kit and metal engine mount. I will be doing this some day myself turning a great heli into a monster!

    The Venture files and good as it looks!


    I have been flying helicopters for a year, and am learning something new every day. I wanted to try a CCPM heli for the sake of setting up and flying some different than my conventional heli, thus the Venture.

    I am very pleased with the first rate construction, sturdiness of the frame design and smoothness of flight. This heli performs great with no modifications, is cheap to repair and parts are readily available. Some people have pointed out that the size and weight of the heli is a deterrent compared to a Raptor or Caliper. This heli is made for the larger 30 class engines and with new engines coming out like the Thunder Tiger Pro .39, you can still bounce and flip around the sky without breaking the bank in fuel costs.

    Overall, the Venture has all the good parts of an Ergo coupled with some incredibly ingenious frame design. The machine should take someone from first-day beginner right on into moderate 3D with no change in equipment necessary. The best thing is that when you doink it, you won't feel the repair cost pain of it's more expensive siblings.


    Kit Quality

    (1=Not so good, 5 = Excellent)

    Packaging Quality:

    1 2 3 4 5

    Construction Quality: 1 2 3 4 5
    Hardware Quality: 1 2 3 4 5
    Quality of Manual: 1 2 3 4<
    Comments on RCU Review: JR JR Venture CP - 32

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    The comments, observations and conclusions made in this review are solely with respect to the particular item the editor reviewed and may not apply generally to similar products by the manufacturer. We cannot be responsible for any manufacturer defects in workmanship or other deficiencies in products like the one featured in the review.

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