Thank you for your comment. I don't fully understand the meaning of your question. Jetcat P60 and P80 have different bearing diameters. Unfortunately I don't know the model number of the P60 bearing. The P80 has a 608 bearing. In my other videos, I replaced the bearings on the P80.
Thank you for your comment. The high exhaust temperature was due to bearing wear. I replaced the bearing with a new one and it worked. The second problem is the wear of the starter clutch O-ring. This also works fine after replacing the O-ring.
Hello!, So what do you think caused the high idle temperature in this turbine? I have a jet cat P120 which was crashed and I fixed it , but it's having the same high idle temperature issue. But I don't understand what could cause high idle temperature in a turbine.
Thank you for your comment. The cause of this engine was the bearing. I replaced the bearings with new ones and everything worked fine. It is thought that the cause of the high temperature is that the combustion temperature rises due to the increase in the rotational resistance of the bearing.
@@ringoen-saito OH wow, really! I thought the cause of high temp idle could be some blockage in the fuel delivery tubes. How do you balance the engine after a repair, do you have a dynamic balancer or do you do it some other way?
The P80 engine is a thin tube that uses part of the fuel to cool and lubricate the bearings. If this tube is blocked, the bearings will wear out quickly. Try to see if the turbine runs quietly and smoothly for a few seconds when you turn it by hand. If it doesn't rotate, the bearing is worn. When I replaced the bearings, I marked the rotating parts. So I made sure that their positions did not change during assembly. There is no engine vibration during operation. Not recommended if you want the perfect balance.
02:51 Is the combustor liner damaged or is it normal to have those deformations? I would expect those to impact flow and increase pressure drop in the combustor.
Thank you for your comment. The combustion chamber of this engine was deformed by the impact of the crash. You are right. I have already fixed this combustion chamber deformation.
Hi, great work! I am also repairing a jet cat p120. I just changed the bearings, but i don't know what the torque of the turbine wheel nut and the compressor wheel nut is. So I could really use your help. So to what torque spec did you torque the turbine wheel nut and the compressor wheel nut to?
I tightened the turbine side nut a little tighter. On the compressor side, a flat-blade screwdriver was passed through the side hole of the nut and tightened. Be careful not to overtighten the turbine side as the screws will break. I once broke the screw and am repairing it.
Nice job. Did you do anything for the damaged turbine?
Thank you for your comment.
The repairs to this engine included replacing the bearings with new ones and fixing the deformed combustion chamber.
お世話になります。
またもや既製品の修理ですか！
今回はP80ですか！
私もJetCatのP220RXiを所有してますが、個人的にはJetCatが一番美しいのかなぁと思ってしまいます笑
話が逸れましたが、毎度毎度リペアをして直せてしまうのが素晴らしいです。
これからも楽しみにしてます。
いつもコメントありがとうございます。JetCatのタービンは設計が優秀ですね。燃焼室やNGVも温度上限に応じて材料を使い分けています。今回はベアリングの型番から入手ルートを見つけることができたのは大きな収穫です。また、ベアリングの潤滑・冷却機構を理解することができたので新しい設計が楽になります。自作シリーズも継続していますのでもうしばらくおまちください。
Blz.os rolamentos da 60 sao iguais da 80 ? Teria a medida pra me passar da 60 ? Obrigado. Boa noite
Thank you for your comment. I don't fully understand the meaning of your question.
Jetcat P60 and P80 have different bearing diameters. Unfortunately I don't know the model number of the P60 bearing. The P80 has a 608 bearing. In my other videos, I replaced the bearings on the P80.
@@ringoen-saito estou a abrir minha p 60 e vou providenciar os rolamentos antes . Mas obrigado pela atenção
Sounds like an issue with the turbine section based upon those two statements, no auto-start and exhaust temperature too high.
Thank you for your comment. The high exhaust temperature was due to bearing wear. I replaced the bearing with a new one and it worked. The second problem is the wear of the starter clutch O-ring. This also works fine after replacing the O-ring.
Hello!, So what do you think caused the high idle temperature in this turbine? I have a jet cat P120 which was crashed and I fixed it , but it's having the same high idle temperature issue. But I don't understand what could cause high idle temperature in a turbine.
Thank you for your comment. The cause of this engine was the bearing. I replaced the bearings with new ones and everything worked fine. It is thought that the cause of the high temperature is that the combustion temperature rises due to the increase in the rotational resistance of the bearing.
@@ringoen-saito OH wow, really! I thought the cause of high temp idle could be some blockage in the fuel delivery tubes. How do you balance the engine after a repair, do you have a dynamic balancer or do you do it some other way?
The P80 engine is a thin tube that uses part of the fuel to cool and lubricate the bearings. If this tube is blocked, the bearings will wear out quickly. Try to see if the turbine runs quietly and smoothly for a few seconds when you turn it by hand. If it doesn't rotate, the bearing is worn.
When I replaced the bearings, I marked the rotating parts. So I made sure that their positions did not change during assembly. There is no engine vibration during operation. Not recommended if you want the perfect balance.
Mong bạn ra nhiều video mới nhất về động cơ phản lực tôi rất thích động cơ phản lực
Thank you for your comment. If you like, please watch this recently uploaded video.
th-cam.com/video/uv8q5pxL_4Y/w-d-xo.html
02:51 Is the combustor liner damaged or is it normal to have those deformations? I would expect those to impact flow and increase pressure drop in the combustor.
Thank you for your comment.
The combustion chamber of this engine was deformed by the impact of the crash. You are right. I have already fixed this combustion chamber deformation.
@@ringoen-saito Oh I see. I just found this video and didn't realise it was involved in a crash. The damage looks surprisingly moderate to me now! 😄
I have repaired several crashed and burnt jet engines. Usually the intake side is damaged.
こんにちは。
P100、P60所有していますが、両方ともエキゾースト側のブレードの接触痕があります。
P100は羽が飛びました。
P60はメーカー修理したのに変わらずです。組み方等で改善される物でしょうか？
コメントありがとうございます。
趣味でP80を2機修理しましたが、1つはブレードの接触がありました。個人的な意見ですが、他社のものを分解して比較すると明らかにベアリングへのイニシャル荷重が大きいと感じました。そのためベアリングの磨耗が進行するとタービンが回りにくくなり燃焼温度が上昇し、ノズルガイドベーンが変形して接触するのだろうと思います。ちなみにP80のノズルガイドベーンのタービン付近の金属が他社より薄いです。Evoと比較すると半分ぐらいです。
組み立て方では難しいと思いますが、私の場合はタービンとのクリアランスを一定にするようにノズルガイドベーンの内径を修正しました。
字幕を追加しました。
Hi, great work! I am also repairing a jet cat p120. I just changed the bearings, but i don't know what the torque of the turbine wheel nut and the compressor wheel nut is. So I could really use your help. So to what torque spec did you torque the turbine wheel nut and the compressor wheel nut to?
I have not measured the torque of the turbine nut. I think there is no problem if the nut is tightened with one hand with a 20 cm wrench.
@@ringoen-saito ah ok, but do you know how tight the compressor wheel nut is supposed to be, like its torque?
I tightened the turbine side nut a little tighter. On the compressor side, a flat-blade screwdriver was passed through the side hole of the nut and tightened. Be careful not to overtighten the turbine side as the screws will break. I once broke the screw and am repairing it.
Super !!!!