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Search: Posts Made By: Xairflyer
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Forum: RC Jets
05-06-2010, 05:31 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Again maybe the wording is not clear, the inner race is tapered and the narrowest part of the taper points IN away from both wheels.
The arrow on the bearing case is the best to follow it should...
Forum: RC Jets
02-21-2010, 05:10 PM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

I would suggest going onto the GTBA site for information like this, the guys there have been building KJ66 and other turbines for years and know the process inside out
Forum: RC Jets
02-13-2010, 06:03 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

I have planned to put it, plus other turbine related stuff, in a word doc for my own use (I forget easily :D) and when I do I will probably put it on my website.
Forum: RC Jets
01-31-2010, 07:59 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Thanks maybe I have not worded it clear enough so I might take apart an old bearing today and take a pic showing the correct orientation of the inner cone to bearing outer case. Pictures do say much...
Forum: RC Jets
01-31-2010, 07:51 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Yes flying has been done with two piece cone, I think the thrust is now the same as before with the single piece just going by the Push felt on the ground and the vertical performance. I believe I...
Forum: RC Jets
01-31-2010, 07:15 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

First Runs
It fired up as usual once the fuel reached the turbine as I prefer to let it take it's time rather than priming, I always think you can prime to much. Ramp up was good, fair bit of pops...
Forum: RC Jets
01-30-2010, 11:49 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

No myself and all the guys I fly jets with use a centre pickup header tank system and no one has had any problems in the three years or so we have been flying turbines. I think I have it detailed...
Forum: RC Jets
01-30-2010, 11:44 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Before going any further you could blow the compressor with an airline and spin it up fairly fast and see if any vibration, if you think it seems ok then you can remove your screws at the back and...
Forum: RC Jets
01-30-2010, 11:31 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

I mentioned it somewhere further up the posts, I was not happy with the journal size at 7.97mm.
Forum: RC Jets
01-30-2010, 11:30 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

It was first fitted for a few flights in a AMD Hawk I then fitted it into a Nitro planes/planenutz bobcat which it had been flown in for a year and a half or so before I stripped the turbine back in...
Forum: RC Jets
01-30-2010, 11:25 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Put a little smear of turbine oil into the tunnel and on the outside of the preload spacer, drop in the Preload spring into the tunnel, followed by the spacer, if the O ring is new this may require...
Forum: RC Jets
01-30-2010, 10:40 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Next I fitted the combustion chamber over the tunnel and fed the fuel/gas pipes through the diffuser. The festo fittings shown were only temp screwed on to help pull them pipe through.

The...
Forum: RC Jets
01-30-2010, 10:16 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

I forgot to take some pics during rebuild so some used are from another source but the same turbine.

New GRW bearing fitted into the end of the shaft tunnel with again arrow pointing out/at the...
Forum: RC Jets
01-30-2010, 09:46 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Putting it back together
Before I refitted the fuel and gas rings into the combustion chamber I got a friend to add a spot of tig weld to my glow plug collar as it looked like it could come loose...
Forum: RC Jets
01-30-2010, 08:57 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Balancing
Debated [sm=confused.gif]whether to add this now or at the end, as it would be done before reassembling I added it now.

I replaced the shaft, so I needed to rebalance. I made loads...
Forum: RC Jets
01-30-2010, 08:01 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Important before re building the turbine that you look over and clean everything, inside the shaft tunnel, so the preload spacer and spring slides freely, there are also two O rings that hold the...
Forum: RC Jets
01-30-2010, 07:31 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

More on the bearings
You need to be careful when sliding the bearing on the shaft as if pushing to hard on the outer race, it can come apart and leave you with balls all over the place.
Bearing...
Forum: RC Jets
01-30-2010, 07:01 AM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Replacing the front bearing is an easy enough job as it is removed during disassembly. Some builders fit a lower spec bearing at the front being cheaper as it is easy to change more often,

The...
Forum: RC Jets
01-29-2010, 02:38 PM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Will post more later tonight
Forum: RC Jets
01-29-2010, 02:33 PM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Pic below shows a layout of all the main bits, at this stage it is fairly streight forward to put it back together again especially if everything has been marked to aid assembly.

I also want to...
Forum: RC Jets
01-29-2010, 02:24 PM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

With the front cover removed you can now remove the plate and screws holding on the shaft tunnel. When the plate is removed the lubrication pipe is visable, This pipe can be checked for any blockages...
Forum: RC Jets
01-29-2010, 02:21 PM
Replies: 46
Views: 26,683
Posted By Xairflyer

RE: JJ1400 14lb Turbine Stripdown/Rebuild

Next removing the front spinner nut. Before you do this, if you want to be able to re-assemble without balancing you will need to mark the position of the compressor on the shaft. First mark the...
Forum: RC Jets
01-29-2010, 02:16 PM
Replies: 46
Views: 26,683
Posted By Xairflyer

JJ1400 14lb Turbine Stripdown/Rebuild

This is how I went about doing a service on a JetJoe 1400 turbine, which included replacing bearings, cleaning injectors and balancing.

Much has been talked about Jetjoe turbines on other...
Showing results 1 to 23 of 23


 
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