What a busy busy week we have all had, specially Brett from austjets.com. he has been tirelessly working on the wiring to get the first of both engines running. I seriously don't know where i'd be without him he is an amazing man when it comes to turbines and not to mention wiring. below you can see the first test of the start sequence Brett has setup for the engines, we will be playing it safe with running the engines as we are still not fully aware of their full potential so i will run them at about 80% to begin with till we have a better feel of what they can do.
Oh! did i mention that i maybe running a radio controlled accelerator, believe it or not it will be making the board less cluttered and have less wiring all over the place, i will also be running a radio controlled shut down, this means that one person can stand and watch me as i do my pass and if they see something wrong that i don't they can shut the engines down by flicking a switch on a radio transmitter.
Please stay tuned as a test fire of the engines is not far away, just to add i have also been a busy boy with trying to get the record attempt some attention, one thing i have done is decked out my van to make it the new official Jet Luge mobile, with a huge thanks going to the guys down at TopTen Tyres for putting some tough looking 20 inch wheels on the van. i hope you like it and if you see it about town feel free to come and say hi.
What a busy week i have had this week, with allot of it taken up with messing around with turbines, not a bad way to spend some time. well this weekend saw Brett from ausjets.com and myself balancing the turbines, most would assume this would have been done in the factory and in most cases it would, one was already balanced and tested but due to the MASSIVE delay the only way to retain some form of reasonable time line was to send the other motor out untested and not balanced, this was ok with me as we had agreed that we would balance them our selves once they arrived anyway, balancing is is one of the single most important things we can do for the turbines, it will prolong the life of the engine as well as the bearings, it also helps stop the engine from ripping it's self apart. below you can see one of the turbines being spun up to find out where the imbalance is.
you can see in the picture below that the target on the left is the rear turbine and the target on the right is the front. picture looking at the turbine head on or from directly behind, the dot is showing where there is an imbalance in the turbine and impeller. In this case the rear turbine needs 3.79 grams taken out of it, while the front only needs 153 milligrams taken from it to get it just right. The 220 and 209 degrees at the bottom is not temperature, it is actually showing how far around front top dead center you need to remove weight, in this case it is 220 deg of 360 deg on the rear turbine and 209 deg on the front.
Below you will see Brett as he shows me where we need to take some weight out of to have the turbine spinning true. this is simply done with a marker and then grinding it out.
below you can see as Brett takes out some meat from the rear turbine to help with the balance of the engine. That line you see on the center nut is reflective tape and helps us tell where top dead center is, it also reflects a laser top help us tell what speed we are spinning the motor up to while balancing it.
Well with the motors landed and me sitting here waiting for the electronics to be delivered after getting a text saying they are being couriered to me as i type, i decided i had better give you guys an update as to what has been happening for the last 2 weeks.
Besides misplacing yet another job hehe, Brett "Smithy" Smith from AusJets.com has been going over the engines to make sure all is well. Both motors have been completely dismantled and every little bolt and nut is being given a good look over.
Below you will see a few photos of the inner workings of my motors and with it a sneak peak into what makes a turbine tick. Well actually most of you may know a turbine doesn't tick, it kinda makes a whoooshing roar type noise, but you get the idea right? hehe.
Above is the main body of the motor, you can see the intake impeller on the table to the cans left, this engine may look a little different to the ones you see on your standard jet airlines planes as this motor is built purely for thrust and power, where as the airlines engines drive a large fan at the front of the motor, which give them their distinctive look, the combustion or engine is actually much smaller on the airlines motors than you think. see below image.
you will see that on the airlines engine the combustion chamber is much smaller than the rest of the engine, this drives the larger fan, these motors are typically known as a turbo fan engine, and are built more for efficiency. Below you will see a better depiction of my engine, my engine is classed as a turbo jet engine, basically similar to the thing people have in their cars to go faster, and built for pure trust.
you may notice that the center of both engines look rather similar, that's because they are, you can see the burner (combustion chamber) in my engines in the photos below.
after the the air fuel mixture has been combusted it is drawn out though the back with the help of the turbine fan, you will see it on the far left in the below photo.
so if i haven't bored you yet and your still reading we will next be balancing the motors, then have them test run on the bench, this will be the fun bit as we don't have any mounts strong enough to hold them yet and i promise a video will be coming of the first start up.
if you have any questions related to my engines feel free to ask via the comment tab at the bottom of this thread and please don't forget to click the like button to help me get this attempt out there.