With the knowledge of Century Helicopter Products and their gas-powered helicopter experience, we are proud to present the Hobby World Corporation T700 Gasser conversion kit. This kit takes a standard T700 nitro and allows the pilot to convert the power plant to a gasoline engine. The conversion kit uses the reliable, tried-and-true Zenoah PUH motor format (from 23cc to 30cc). This is a very complete conversion kit with all the components coming from one manufacturer and doesn't require the need to purchase additional parts. Once converted, you will be provided with highly efficient and inexpensive flights using gasoline instead of much more expensive nitro fuel. This product is exclusively distributed by Century Helicopter Products. Please inquire with your local dealer for more information.
Figure 1: This is what comes in the conversion kit.
Figure 2: First we start out with the basic T700 mechanics.
(The nitro engine and related drive-train components have already been removed in this image.)
Figure 3: When performing your conversion, you will first remove the original clutch assembly.
The replacement special gasser clutch bell is shown on the right. Notice how much larger it is compared to the standard nitro clutch.
Figure 4: You will be utilizing the bearings and clutch bearing blocks. A special pinion gear is included as
this slant gear pinion provides additional surface area and strength needed when using a gasoline power plant.
Figure 5: The original clutch bell assembly and pinion with starter shaft is shown on the left,
the converted clutch bell assembly is shown on the right.
Figure 6: The elevator A-Arm and the various bearing blocks are going to be
removed from the main mechanics and used in the following steps.
Figure 7: Shown here are the new side frames along with the fuel tank.
These parts are going to be used to start the build up of the frames.
Figure 8: Here are the frames built up with the elevator A-Arm installed along with the fuel tank fully assembled.
Figure 9: This is the rear frame and the tail pushrod control bellcrank.
Figure 10: The rear frame and tail pushrod bellcrank shown assembled onto the frames.
Put the frames aside to start the engine preparation.
Figure 11: A Zenoah 23-30cc engine can be utilized with this kit. The drive train has been engineered to handle the torque of these motors. Shown here are the new clutch shoe, cooling fan and accompanying shroud. The cooling fan is a very important part to create a successful gas powered helicopter. This is a dual function cooling fan featuring fins on top and bottom. This offers a push/pull configuration offering optimum cooling of the engine. The clutch is very large at 54mm in diameter. This provides the grip needed to transfer all the torque available in these gasoline motors.
Figure 12: The clamping style fan hub offers a unique way to fasten onto the crankshaft found on these motors. This heavy duty fan hub provides a very stout platform for the heavy duty clutch. This is the engine assembly complete with the clutchshoe mounted.
Figure 13: Here is the engine mounted on the landing gear platform. NEW carbon fiber landing gear now stock on T700 conversions. The engine is captured in 3 locations on the platform, and 2 more later onto the frames, offering a 5-point support configuration. Also included are side frame reinforcement plates. Notice how the engine assembly can be separated from the side frame assembly. This offers very easy access to the engine for future maintenance if required.
Figure 14: The side frames and engine platform are shown assembled.
The needed parts from the original T700 mechanics is the electronics tray and hardware.
Figure 15: Throttle servo mounting plate shown assembled onto the mechanics.
Figure 16: Original electronics tray shown mounted onto the mechanics.
Figure 17: The tail boom is going to be used for the next steps. Remove the tail boom assembly from the original mechanics.
Figure 18: The tail boom and various hardware are pictured here for use in the
next step of mounting the tail boom and supports to the main mechanics.
Figure 19: The tail boom is mounted onto the main mechanics.
Figure 20: Another view of the assembly thus far.
Figure 21: We are going to utilize the original sprag one-way assembly.
A new 103T slant cut main gear is provided. The original tail drive gear is also going to be used.
Figure 22: Here is the gear assembly completed.
Figure 23: The side frame reinforcements, gear assembly, and main shaft with head are ready for installation.
Figure 24: The conversion is almost complete.
Figure 25: Mount the elevator servo mount and the rudder control rod. Then mount the servos.
Figure 26: Here it is: the completed HWC T700 Gasser Conversion mounted with optional
RotorTech 710mm SG Edition rotor blades installed. Also shown is the optionl Torpedo Slim Tuned Gasser Muffler.