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« Reply #25 on: June 24, 2020, 01:35:20 AM »
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you truly are an Ironman fan Giggle
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« Reply #26 on: June 24, 2020, 07:48:00 PM »
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you truly are an Ironman fan Giggle

Hahaha, Yes big fan. All my stuff is having that logo. Bike helmet laptop walls profiles etc.

Update:

As the shaft failed, got the new round and will start machining soon.
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« Reply #27 on: June 28, 2020, 01:10:40 AM »
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Designing the shaft and the diffussor gave me the clue that 80mm will be difficult to make at this point of time. The parts become really small and the compressor wheel might not be able to drive the turbine wheel. The current compressor wheel selected is 5+5 with exuder 54. Need better GT compressor wheel to deliver. May be need to experiment.

So I am switching to 90mm diameter. Everything else remain same. Will machine the new shaft tomorrow if time permits.
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« Reply #28 on: July 01, 2020, 01:58:12 PM »
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Meanwhile, I got some parts from US and Spain. The turbine wheel and NGVs. It took almost 2 weeks to reach me after custom clearance (pandemic thing). The customs was cleared fast. To my surprise & dismay, the Indian customs has charged 80% & 90% total duty on the declared amount on the respective shipments under the code 9965. One came through DHL and other through UPS. Both shipment was not opened.(went through x-ray screening). Now this is astounding. Did they thought its coming from China? Such a heavy charging. Usually they use to charge around 42-43%.


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« Reply #29 on: July 01, 2020, 05:22:31 PM »
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Was thinking of ordering some parts from China for some projects. If that's the duty they're gonna charge then whoops, the plan goes down the drain.
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« Reply #30 on: July 01, 2020, 06:13:27 PM »
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Its tough to get anything from China now. DHL and FeDEX both have halted the shipping from China given the Indian custom is not clearing stuffs. I don't know the point of this. This is hurting our own industries and the global companies assembling or manufacturing here. This is not the way one reduces dependency.

Charging double as duty is not the way.

But I think this won't last longer.
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« Reply #31 on: July 01, 2020, 06:30:56 PM »
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That's just stupid and pointless. What do they think they'll achieve out of this?
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« Reply #32 on: July 02, 2020, 01:29:47 AM »
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Update:

So after the first shaft failed. I started with the new one. I have been machining it 2 days now (some 8-9 hours).It was about to finish. But today luck betrayed at the last moment. I delayed a fraction of sec in detaching the lead screw and it screwed me up. The shaft bent a bit. This one also goes to the grave.  Hats Off

Time to machine the 3rd one. Small parts are not that easy machine it seems.  Bang Head
Fun continues.

Screenshot_20200702-012831-picsay.jpg
Re: Kick starting jet turbine project (60N class)
* Screenshot_20200702-012831-picsay.jpg (23.24 KB, 621x298 - viewed 126 times.)
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« Reply #33 on: July 09, 2020, 11:56:22 PM »
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Update:

The week has past without much progress on machining front. The city is under lock-down and I can't get the shaft material till 12th.

Meanwhile I took a chance to investigate the 1st shaft failure which looked like a caliper being misread. careful investigation revealed that my lathe machine was cutting taper and off center. This week I disassembled the head to align the offset. Now it is aligned. I will check the center alignment tomorrow.

The reason of this was change of place and over the time head do tend to get misaligned. Once set I will proceed with the shaft machining next week.

The other team is working on the control electronics for the engines. A PIC IC based controller is being worked upon. He is the circuit board in 3D.

62cd70ab-758a-44bf-b3a3-10a40f591ff3.jpg
Re: Kick starting jet turbine project (60N class)
* 62cd70ab-758a-44bf-b3a3-10a40f591ff3.jpg (65.98 KB, 800x595 - viewed 112 times.)
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« Reply #34 on: July 14, 2020, 09:24:53 PM »
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Update:

The tail stock was misaligned by 1 mm. This would never let the shaft be concentric. I removed the offset last Sunday and also got the shaft round machined. The shaft is ready now.

330d5dff-18d7-403c-9ce2-971b98ce5b65.jpg
Re: Kick starting jet turbine project (60N class)
* 330d5dff-18d7-403c-9ce2-971b98ce5b65.jpg (32.27 KB, 800x349 - viewed 75 times.)
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« Reply #35 on: July 28, 2020, 09:56:00 PM »
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Update:

Its been a while I posted here. Last couple weeks were consuming.

Now following parts are ready.

1. Shaft
2. Shaft tunnel
3. Diffuser system
4. Compressor nut
5. Turbine nut
6. Turbine wheel (German make, machined it to tolerances)
7. NGV (german make, Needs machining)
8. Compressor wheel (ready stock from Garrett)

Next in line will be diffuser outer. As this project is agile one, the diffuser dimensions will be calculated and drawn in CAD. Will surely post some pic soon.

Cheers!!
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« Reply #36 on: August 02, 2020, 09:40:05 AM »
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As promised, Here are some pics of the parts made so far.

You can spot the completed diffuser, shaft tunnel in making and the front shaft nut.


IMG_20200726_204619.jpg
Re: Kick starting jet turbine project (60N class)
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