UKBL ~ 10 Second Banner Rotator
View RSS Feed

Jet'n in Texas

Building the Tazor 1.0

Rate this Entry
Thread has moved to:

02/06/2011 -- Haven't gotten to the beginning task of the build yet, but studying the instruction manual, looking at the parts provided and deciding among various. options.
One decision involves whether or not I want to do gear doors. the added complexity, and the potential for air leaks, or having to land with fouled gear because something didn't work right has me leaning towards keeping it simple. My spark makes a whistling sound due to its open wheel bays and I kinda like it. So, I am leaning on mechanically using a door for the oleo, but forgoing the wheel cover. This is not final yet, please comment if you have a strong opinion one way or the other, I could be swayed.
Here are some pictures of kit parts and the undercarriage.

Click image for larger version

Name:	parts2..jpg
Views:	464
Size:	224.4 KB
ID:	503 This is a tray of hardware showing some bits and pieces that came with the kit. Note the fiberglass horns, high quality ball links, clevis's, door brackets, hinges, etc. The little red tool is a wedge to separate the wing when breaking the model down. The wing snaps together using white nylon pegs that fit into a female receptical to securely hold the wing.

Click image for larger version

Name:	parts3..jpg
Views:	492
Size:	277.0 KB
ID:	504 Nose Gear. Interesting, the manual shows a directly driven steering coupling base on a spigot mounted on the servo the steering arm drops into the U shaped cup in the spigot (for lack of a better way to describe it) The direct drive steering is only engaged when the gear is down and the spring centering wire keeps it straight when retracting. This is probably a common method, but to me its new and seems to be a elegant method.

Click image for larger version

Name:	wheel..jpg
Views:	555
Size:	246.3 KB
ID:	505 Wheel and brakes. These wheels are great, the photo doesn't do them justice, but they use ball bearings, and are pretty wide so they shouldn't have problems in a grass field. The brakes look nice, and the retracts are really tough

Click image for larger version

Name:	oleo-retract..jpg
Views:	499
Size:	258.5 KB
ID:	506 I plan to start the initial tasks now, fitting the hatch for the fan area and the cockpit.
will be checking back when I get something done.

Click image for larger version

Name:	hatch1..jpg
Views:	500
Size:	139.1 KB
ID:	509 The small semicircular tabs are a perfect fit, just stick in the slots provided. I waited until I cut the slots for these tabs in the fueslage just give me a little bit of flexibilty

Click image for larger version

Name:	hatch2..jpg
Views:	494
Size:	183.0 KB
ID:	510 Be very careful not to loose one of these before you get them glued into place, I lost one at least three times. (found it each time)

Click image for larger version

Name:	opening1..jpg
Views:	480
Size:	155.7 KB
ID:	511 Now all the slots are cut! I taped the rails, and then laid the hatch in place, and lined it up so that although it was held off by the tabs, I was able to take a pencil and make a center mark, and a line to indicate where the tab fit.
Then I took a dremel, scored a line. then an exacto saw cut it through, then I tool an exacto flat file, and worked the slotted open to the correct size using one of the semi circular tabs as a gauge, once it would fit flush, then I was ready to move on to the next one. I put a sheet of plastic on the hole to catch the dust and debris from cutting and fileing.

Click image for larger version

Name:	opening2..jpg
Views:	522
Size:	153.0 KB
ID:	507 Tape off, ready to check the fit

Click image for larger version

Name:	fitfanhatch..jpg
Views:	520
Size:	154.1 KB
ID:	508 hmmm. it seems to fit real nice, hope I do as well when I add the rear locating tab.

Click image for larger version

Name:	restingspot..jpg
Views:	520
Size:	319.0 KB
ID:	512 Back in its resting place until I can do some more work on it.


Submit "Building the Tazor 1.0" to Digg Submit "Building the Tazor 1.0" to Submit "Building the Tazor 1.0" to StumbleUpon Submit "Building the Tazor 1.0" to Google Submit "Building the Tazor 1.0" to Facebook

Updated 04-04-2011 at 07:09 PM by Richard Evans

Tags: tazor Add / Edit Tags
Build Logs


  1. Richard Evans -
    Richard Evans's Avatar
    I'm beginning to wonder how to set this Tazor up. I have a 9 channel JR 2.4 radio and I won't use servo reversers (I have a dislike for twitching, randomly moving control surfaces).
    so, sometimes my solution when using a Y cable where you can't reverse the servo direction of one of the servos to make it go the right direction (like when you have flaps on a Y cable), I flip the servo over so the arm is on the other side to get the desired operation. (I prefer symmetry though if I can achieve it) but I call this asymmetrical.

    With 2 aileron servos, 4 flap servos, two rudder servos, landing gear servo, nose steering servo, and wheel brake servo.
    Obviously I will need to use some Y cables and so I guess I need to plan the geometry and channel usage of how to install the servos and where two servos will be connected to a single channel.
    Here is what I'm thinking so far.

    Ailerons separate channels, mounted symmetrically Aileron and Aux1
    Outboard flaps, Y cable, mounted asymmetrically, aux3, mixed with LG?
    Inboard flaps, Y cable, mounted asymmetrically aux2 channel, switch operated.
    Throttle, throttle channel
    Elevator, elevator channel
    Rudders, Y cable, mounted asymmetrically, rudder channel
    Wheel brakes, Y cable, elevator channel (same channel as elevator, but programmed to actuate the valve on down elevator)
    Steering, Y-cable, Rudder channel
    Retracts, retract channel (5)

    So, does this look do-able? (JR X9303)

    1 throttle --- throttle
    2 aileron ---- right aileron
    3 elevator ---- elevator, Y cable to Wheel brake servo
    4 rudder ---- Y cables to two rudder servos
    5 gear --- gear ---
    6 aux 1 --- left aileron
    7 aux 2 --- inboard Flaps, switch operated
    8 aux 3 --- outboard flaps, mixed with Lg channel 5
    9 aux 4 --- wheel brakes, mixed with down elevator

    So, am I looking at this right?