Videos

450T TwinJet Setup

I'm setting up my TwinJet to run both the High Speed and Mid Speed configuration. The above photo shows the 450T - mid speed version of the 450TH. This conversion can be done at the field by removing the bells and sliding on new bells to change the KV from 1700 to 3000. You'll need to drop you prop size and before going to the field remove the tiny C Clip that holds the bells on. Flying without the C Clip should have no bad effects. It is possible that dragging the prop on landing could cause the bell to remove and in the worst case pulling the bearing out. So watch for this and choose if this is how you want to setup. I intend to setup the above plane for 7x7 on 450T which provides almost 2 lbs of thrust per motor - combined 2 oz's shy of 4 lbs of thrust. Each motor pulls 29 amps at 10.5 volts and has our 32 amp ESC, Measured speed is 101 mph static. This is a thrust setup, the 450TH on a 4.75x4.75 prop will be a speed setup.

Note the dual 2200 15C packs in the fuselage. This spacing sets the CG Perfectly and we are around 2lbs 4oz's. The EPP insert, that I made added a couple of oz's.

Some work in progress - Dual 450T in TwinJet

Click to view larger photo

I'm working on a Multiplex TwinJet to run dual 450T motors. Once I get a handle on it with the dual 450T's I will swap bells and run a 450TH for blistering speed. I many times want to just run with lower speed and higher thrust. Only if I'm at a large field and it's safe to fly 120+ mph would I mount the smaller props and higher speed bell. I've added alot of re-enforcement to the plane since I intend to stress it severely. I put a CF 1mm thick tape across the bottom of the wing. Embedded a 1mm CF rod in the elevons, Put flat CF tape on both sides of the Elevons. I've experienced the first thing to flutter when pushing pylon style planes is the rear stabilizers will start singing from the rapid vibration of pushing the plane too fast. The CF tape should remove that from this setup. I like using Aluminum mounts since they act as heat sinks to remove any heat from the motor. I picked up some 2" x 2" 1/8 thick L bracket from my LHS and formed a nice little bracket for mounting the motors. Use the X Style mount as a template for the screw holes.

Maiden Video:

Update 12-30-06: I've been flying this Jet all summer. I love the 7x7, 7x6, 7x5 props. The Jet is one I will fly at 80 mph low and slow it down to about 30 for slow flight and still have great control. It spins like a top in high rates, so I'm constantly flicking back and forth between the rates. I like to fly at all high rates, but sometimes don't trust my reactions. I have had only one crash and that was doing high alpha about 20 feet above the ground and a collet screw came loose. The prop came off and I didn't realize it. The plane spun in, I instinctively powered up to regain control and added a tighter spin to the dive. Nose first - but totally repaired and still flying very well. The batteries took no damage due to the foam fillet. I have carved passage ways in the fillet to allow more air to the batteries. Other than that - I have done virtually no tweaks. It was perfect from the start. I do recommend a squarely aligned L bracket. My first mount was angled and that caused the nose to climb. At full throttle I had to hold the nose down with the elevons. Square she flys perfectly, although with less High Alpha capability. All of the strengthening and STD Servos have no failed me.

450T Videos

Craig's Splat R/C Wing

Craig's Splat R/C Wing Vid #2

Vinnie's Blue Core Stryker Wing

and another easy flying video on the TL Wing
TL Wing

450T Brushless Motor

The 450T is the 450TH with a Mid Speed bell. If you have a 450TH, you can run it with both 3000Kv and the 450T's 1700Kv. The reason you might want to do this is to run larger props or higher voltage. I like this on a 7x5 prop for decent speed and good thrust. When maidening a new airplane, use the MID Speed bell and work out the airplane, setting it up with higher control since you'll have higher thrust than the 450TH. Then put in the High Speed bell and run at very high speed.

450T Performance Charts

450T Performance Charts from Dr. Kiwi

Click chart to enlarge