View Full Version : HET-RC Super Sniper Build Thread
cgroves
02-20-2006, 08:45 AM
Given the terrible flying weather on the weekend I decided to start another of my winter projects and take a break from glider assembling and tuning. I am putting together a HET-RC Super Sniper electric ducted fan jet. The kit arrived from www.warbirds-rc.com (http://www.warbirds-rc.com) along with a Wemotec Mini 480 fan unit. The guys at WarBirds were great and everything was packaged great. They also include a lot of information on their site about the various models in the research section. I had also ordered a Typhoon 2W-20 motor from them and am using a 60 amp ESC purchased locally.
The fuselage and ducting are al FRP composites while the main wing is balsa over foam and the stab and elevator are balsa. The tail is moulded into the body and is fixed, there are no rudder controls on this plane. Here is the kit out of the box:
cgroves
02-20-2006, 08:53 AM
The Wemotec Mini fan is build for Speed 480 size motors and can be ordered with a number of different shaft diameters for different motors. It comes with 2.5mm mounting screws which don't fit most of the Mega and Typhoon motors which need 3mm screws. It also includes an intake ring which won't be used on this project.
cgroves
02-20-2006, 08:56 AM
The wings and stab come with standard plastic hinges which are already inserted. All you need to do is check the alignment and a few drops of thin CA.
cgroves
02-20-2006, 08:59 AM
Now that the wings are together it is time to assemble the motor and the fan. It is CRITICAL that the fan be perfectly balanced since it will be spinning up to around 30,000rpm. If the fan fails it usually destroys the aircraft (this is also why you should never test the fan by holding it in your hand). The fan is rough balanced on its own and then the final balancing is done with the spinner attached. Tape is used to mark the alignment between the fan and the spinner.
Dave Rees
02-20-2006, 09:00 AM
"I feel the need............the need for speed"
Goose
cgroves
02-20-2006, 09:06 AM
The fan shaft mounts on the motor shaft using two grub screws. The end of the fan shaft is notched with a dremel so a screwdriver can grab it later. It is important to make sure the motor is centered so the fan doesn't rub on the shroud or the motor mount. Once the alignment is check the fan is mounted on the fan shaft, the nut secured and the spinner is attached as per the earlier markings.