T-Rex - ordered Transmitter

I am such a dumbass. I, when I ordered my servos and receiver, ordered a crystal for the receiver, and requested a random channel (49) If I think about it now I did it backwards, I should have ordered the crystal when I ordered the Radio, not when I ordered the receiver because it is very unlikely that I will find a radio in stock that happens to have the right channel. Lesson learned.

I ordered a Futaba 7CHP Transmitter, it seems to be a versatile radio, and good enough to meet my needs down the road when I get the T-Rex 600 or even an airplane.



Money in the pit:

I ordered this from modefosheli.com

$161.95 Futaba 7CHP

Total so far $1453.95

T-Rex - More parts ordered

Alright, more parts ordered. I have chosen the Futaba 9650 and GY401 gyro for my tail servo and gyro, this combination is the best for the Rex. The 9650 is a fast digital servo and the GY401 can be adjusted from the radio. There are plenty of other reasons why but that would be too much information.


I opted for a cheaper charger and battery combo. I will be learning how to fly this bird on these packs and won't really need the burst rates the some of the better packs offer when flying 3D. I chose the DN Power Combo that has a charger and balancer and comes with (2) 3S 2150mAh 15C Lipos.


I also ordered a bunch of odds and ends: velcro, wire loom for the servo wires, fun reflective tape for the rotor blades, more Deans connectors for the new battery's, and adapter for my charger to charge Thunder Power Battery, Deans solder, and a GY401 under the frame adapter.

I still need to buy a Transmitter (Radio)

Money in the pit:

purchased at ReadyHeli.com

$59.95 Futaba S9650 Digital Servo
$129.95 Futaba GY401 Heading Hold Gyro
$1.95 1" Velcro Hook & Loop Fastener - 1 Ft. Section
$0.95 Reflective Prismatic Blade Tape 1"x3" Purple Rainbow Mirror
$0.95 Reflective Prismatic Blade Tape 1"x3" Silver Rainbow
$4.95 Servo Wire Sleeving Kit - 1/4"
$3.95 Servo Wire Sleeving Kit - 1/8"
$2.95 Deans Solder
$3.95 One-Way Bearing Removal Tool
$129.95 DN Power Combo - Charger/Balancer & 2 Lipo Batteries
$2.95 DN Balance Charger to TP Battery Adapter
$3.95 Deans Ultra Pack (Male/Female Pair)
$1.95 Deans Female Plug
$18.65 RDLohr's SE Gyro Mount

Sub Total $367

Total so far $1292

T-Rex - Pinion issue

When I was routing my wires for the ESC, I noticed that the main gear was too low on the pinion and was in danger of getting chewed up by the shoulder on the pinion. So I removed the servos and removed the motor. My T-Rex kit came with a motor and ESC also in the kit were two sets of motor mounting screws and washers, as there are two sets of different diameter mounting holes on the motor itself, I used the smaller washers as a shim between the motor and the mount to moved the main gear off of the pinion shoulder.

(pinion shoulder)


After re-installing the motor with the washers I clearly have a enough room and my main gear isn't in danger of getting chewed up. I set my gear mesh using the paper method, where you slip a piece of paper between the pinion and the main gear.