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Search: Posts Made By: hendrix
Showing results 1 to 25 of 67
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Forum: RC Jets
08-31-2023, 03:12 AM
Replies: 118
Views: 16,506
Posted By hendrix

No i am not sure if they are still using them but...

No i am not sure if they are still using them but they did say that they put them in older models didn't they?
Well i can't say anything more than this, i do like the caged bearings i bought from...
Forum: RC Jets
08-31-2023, 02:06 AM
Replies: 118
Views: 16,506
Posted By hendrix

I would choose the caged ones because they are...

I would choose the caged ones because they are factory rated to 140.000 rpm but all the others only up to 60.000 rpm i think.
The caged one works fine near the turbine disc so far, if AMT uses them...
Forum: RC Jets
08-29-2023, 01:35 AM
Replies: 118
Views: 16,506
Posted By hendrix

Yes they work fine but i really suggest you buy...

Yes they work fine but i really suggest you buy the caged ones from AMT turbines,
I have used them both, in fact i have the Yugo at the compressor and the caged from AMT in the turbine section and...
Forum: RC Jets
01-06-2022, 06:34 AM
Replies: 118
Views: 16,506
Posted By hendrix

I am very glad that i was able to help someone in...

I am very glad that i was able to help someone in any way.
Any iron (powder) toroid from 30mm up will do (in the 3 videos the toroid is 30mm OD), as you can see i use plain 2mm enameled copper wire...
Forum: RC Jets
01-05-2022, 12:47 AM
Replies: 118
Views: 16,506
Posted By hendrix

My last post as i finished what i was trying to...

My last post as i finished what i was trying to do
This is the last video showing silver soldering the fuel ring edges, it doesn't get any easier than this.
Notice that the flux on the toroid does...
Forum: RC Jets
01-03-2022, 12:12 AM
Replies: 118
Views: 16,506
Posted By hendrix

induction heating of a 4mm x1 thick brass tube

Here is the last video i shot with the actual brass tube i will use for the fuel ring.
Notice that heating is slower and that it loads the circuit less than copper (6.5A @ 30V) but the toroid and...
Forum: RC Jets
01-02-2022, 12:52 PM
Replies: 118
Views: 16,506
Posted By hendrix

It will work fine as long as the gap is slightly...

It will work fine as long as the gap is slightly larger than the piece you want to heat, don't open a big gap to the toroid that will leave more than 3-4mm of free space on each side (6-8mm total...
Forum: RC Jets
12-30-2021, 06:19 AM
Replies: 118
Views: 16,506
Posted By hendrix

Here is a video i took earlier today showing how...

Here is a video i took earlier today showing how induction heating works on copper.
Chris
https://www.youtube.com/watch?v=oHHYTSKu4Ag
Forum: RC Jets
12-29-2021, 11:20 PM
Replies: 118
Views: 16,506
Posted By hendrix

induction heater update

The 1000w simple induction heater works very very well with brass and stainless steel tubing as long as you use the gapped ferrite coil.
I have a video i took but no cable at work to upload it from...
Forum: RC Jets
12-28-2021, 01:32 PM
Replies: 118
Views: 16,506
Posted By hendrix

Of course! I am not as active as i was but i am...

Of course!
I am not as active as i was but i am still ticking...
One more problem that we all face in this part of the world is hostility of the government to open spaces and rc airplanes in...
Forum: RC Jets
12-28-2021, 11:55 AM
Replies: 118
Views: 16,506
Posted By hendrix

I doubt that i have this ability no to mention...

I doubt that i have this ability no to mention that i will get arrested for noise pollution as i live in a crowded city.
I think AMT has already done this with the brass caged bearings.
Chris
Forum: RC Jets
12-28-2021, 10:39 AM
Replies: 118
Views: 16,506
Posted By hendrix

Update

After countless start ups and running time i must admit that both types of bearings work fine but i do like better them AMT ones with the brass cage, a bit less friction WHEN RUNNING and not when...
Forum: RC Jets
12-14-2021, 07:58 AM
Replies: 118
Views: 16,506
Posted By hendrix

I think that if there is good contact of the...

I think that if there is good contact of the needle with the brass tube, heat will be transferred to the nearby brass and you will have a good weld.
I don't expect the needle to be overheat because...
Forum: RC Jets
12-14-2021, 05:34 AM
Replies: 118
Views: 16,506
Posted By hendrix

Thank you very much!

Thank you very much!
Forum: RC Jets
12-14-2021, 05:34 AM
Replies: 118
Views: 16,506
Posted By hendrix

I have found this video and it uses what i was...

I have found this video and it uses what i was considering at first.
The only difference is that the coil is much smaller something that i will use to experiment with the cheap unit.
If it works...
Forum: RC Jets
12-13-2021, 09:42 AM
Replies: 118
Views: 16,506
Posted By hendrix

Have a look here, looks interesting, basically we...

Have a look here, looks interesting, basically we need a coil with more turns thus more inductance and at the same time a smaller radious.
Maybe a two layer coil will work better....
Forum: RC Jets
12-13-2021, 09:10 AM
Replies: 118
Views: 16,506
Posted By hendrix

That is what i was afraid of. I will use 60v to...

That is what i was afraid of.
I will use 60v to see what will happen, there are two solutions, either i will use stainless steel tubing for the fuel ring everywhere or i will fabricate a small iron...
Forum: RC Jets
12-13-2021, 08:53 AM
Replies: 118
Views: 16,506
Posted By hendrix

Then you know more than me! I will use it with...

Then you know more than me!
I will use it with 8s lipo but i do have a 0 - 60v, 0 - 30A power supply in my lab at work.
Does it work with brass?
I know that it needs more power for brass but hey a...
Forum: RC Jets
12-13-2021, 12:48 AM
Replies: 118
Views: 16,506
Posted By hendrix

Well those are valuable tips! I feel very lucky...

Well those are valuable tips!
I feel very lucky to be able to share information with nice people.
Of course i will share my findings with the group.
UPDATE
A comment on Bangood made me buy this...
Forum: RC Jets
12-12-2021, 09:37 AM
Replies: 118
Views: 16,506
Posted By hendrix

Exactly since that was my first silver solder i...

Exactly since that was my first silver solder i am confident that i will do it better in my attempt to make a brand new fuel ring.
One thing i need to ask is if stainless steel is better than brass...
Forum: RC Jets
12-12-2021, 09:05 AM
Replies: 118
Views: 16,506
Posted By hendrix

Hi. I did used 65% silver solder paste for the...

Hi.
I did used 65% silver solder paste for the first time and it works fine but i wen to 56% for safety...
Forum: RC Jets
12-12-2021, 04:25 AM
Replies: 118
Views: 16,506
Posted By hendrix

The TREFZ turbine 14 years ago... ...

The TREFZ turbine 14 years ago...
https://www.youtube.com/watch?v=zWKns3cbn2E&t=4s
and in one of my planes taking off
https://www.youtube.com/watch?v=kEyfNS4qOyk
Looks like it is airworthy once...
Forum: RC Jets
12-11-2021, 12:49 PM
Replies: 118
Views: 16,506
Posted By hendrix

Yes i do understand what you mean. I was...

Yes i do understand what you mean.
I was suspending the fuel manifold with a third hand the one with crocodiles but i didn't crossed my mind to use a metal base, i will try it!
Forum: RC Jets
12-11-2021, 12:11 PM
Replies: 118
Views: 16,506
Posted By hendrix

The problem i faced is how to heat up the thicker...

The problem i faced is how to heat up the thicker fuel manifold around the needle avoiding the flame to make direct contact with the solder paste, btw i used MAP gas..
It was loosing heat too...
Forum: RC Jets
12-10-2021, 10:52 AM
Replies: 118
Views: 16,506
Posted By hendrix

I am sure of that but it would be nice to use it...

I am sure of that but it would be nice to use it for other purposes like melting led, stuck screws etc.
I just don't know the practical differences of say 1KW and 2 KW and this is what i am...
Showing results 1 to 25 of 67
 
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