Super-Hornet
Veteran
Location: Singapore
| The older TRex450 (XL and older HDE) are using the "Autorotation tail drive gear" and the "Tail Drive Gear" that will give your TRex's tail rotor of spinning close to 5x to the main rotor. (<5:1)
In SE/SE2 and all the "Autorotation tail drive gear" and the "Tail Drive Gear" u can get right now are all configure in such a way the tail spin at 4.2:1 of the main rotor.
{ Autorotation Tail drive gear }
{ Tail Drive Gear }
In 3D configuration, this is O.K. and it might be good as well because in 3D flying style, the user normally configure the main rotor to spin at 3k rpm. With that high RPM, the tail blade grips will not fly off.
In leisure flying or in multibladed heli, it is better to spin main rotor at much lower RPM instead. If using the SE/SE2 type of tail configuration (4.2:1), the tail authority will suffers.
Sadly, it looks like Align no longer producing the older type of tail gear ratio.
To solve this problem, there maybe a solution for it.
By combining the SE/SE2 "Tail Drive Gear" with Mini-Titan's "Tail Drive Gear Set"
Use either this:
{ Tail Drive Gear set }
OR
{ Tail Rotor Shaft }
Procedure:
The trick is to get Mini-Titan's "PV0733 - Tail Drive Gear Set" or "PV0737 - Tail Rotor Shaft".
I use "PV0737" instead. Knock off the pulley gear out. It can be easily knock off.
Then get Align's "HS1216-84 - Metal Tail Drive Gear Assembly" and apply some glue on it.
U cannot use Loctite because the tail pulley is made of plastic. I use epoxy for metal type.
Then carefully slot in the Mini-Titan Tail Pulley into the Align Tail Drive Gear.
Careful not to let the epoxy overspill onto the bearing.
Let it dry for 24hours. It depend on your epoxy. Some have complete dry within 5 hours.
After that, u have a new tail pulley.
I already done that and already install in my TRex 450 Test helicopter. I have yet complete assemble the electronics but by measuring the number of turns, I manage to get around 5.5:1 ratio! (that is tail spin about 5.5x than the main rotor).
I will test flight it and report back on the outcome. The epoxy look and feel strong enough and I hope it will hold.
SH |
