strange covered hole in novarossi??
07-17-2009 | 11:23 PM
#16
I am not flying chopers, my son do that. I have something else.
07-17-2009 | 11:25 PM
#17
Tech Elite
Joined: Aug 2001
Posts: 3,278
From: Bavaria, Germany
Hmm, heven't been here for while.
Well, no one is answered right for nature of that hole.
I will try to help:
Look on the second picture and you will see there ie a grove right behind front bearing and this grove is pretty much hydraulic look to keep case hermetically sealed (when cranck is running oil in that griove create sort of barier. But over the time there is a lot of oil collecting and it will start leaking through the front bearing. So prevent oil leaking from front bearing, designers needs to have hole which is going from carburatortor area (which always have negative pressure) to that grove (if you remove carb you will see that end of hole). To make it manufacturable (it is not possible to make internal hole), you will need to drill the hole from front bearing through grove up to undrneath of carb. But now to make it work as sucking pump, the front end of hole needs to be blocked, so it will not suck oil/air from front bearing. Then hole is blocked on the very end of it on bearing side up to the grove. Now you have perfect chanel from carb area with negative pressure to the grove and all extra oil will be back to motor. You need to block the hole as I explaned above, or do whatever you want to.
Have fun.
Well, no one is answered right for nature of that hole.
I will try to help:
Look on the second picture and you will see there ie a grove right behind front bearing and this grove is pretty much hydraulic look to keep case hermetically sealed (when cranck is running oil in that griove create sort of barier. But over the time there is a lot of oil collecting and it will start leaking through the front bearing. So prevent oil leaking from front bearing, designers needs to have hole which is going from carburatortor area (which always have negative pressure) to that grove (if you remove carb you will see that end of hole). To make it manufacturable (it is not possible to make internal hole), you will need to drill the hole from front bearing through grove up to undrneath of carb. But now to make it work as sucking pump, the front end of hole needs to be blocked, so it will not suck oil/air from front bearing. Then hole is blocked on the very end of it on bearing side up to the grove. Now you have perfect chanel from carb area with negative pressure to the grove and all extra oil will be back to motor. You need to block the hole as I explaned above, or do whatever you want to.
Have fun.
good to see that you are still around. How are you, buddy?
Remember that I called you one day because I had also opened that hole and my engine leaked like an old woman
You explained exactly what you wrote here to me and after I blocked the hole again, everything was good.
Take care,
Stefan
07-17-2009 | 11:30 PM
#18
Tech Elite
Joined: Aug 2001
Posts: 3,278
From: Bavaria, Germany
07-17-2009 | 11:32 PM
#19
Hi Edward,
good to see that you are still around. How are you, buddy?
Remember that I called you one day because I had also opened that hole and my engine leaked like an old woman
You explained exactly what you wrote here to me and after I blocked the hole again, everything was good.
Take care,
Stefan
good to see that you are still around. How are you, buddy?
Remember that I called you one day because I had also opened that hole and my engine leaked like an old woman
You explained exactly what you wrote here to me and after I blocked the hole again, everything was good.
Take care,
Stefan
I am OK. Shooting Sigs 2-3 times a week. Leo is moving to next school up North. The same things.
I am glad to be helpfull, just don't have to much time to come here
Take care Stefan.
Hopefully one day we will meet each other again!
07-18-2009 | 04:37 AM
#20
Thread Starter
Joined: Mar 2006
Posts: 5,120
From: www.moorebankraceway.com
Here some pics attached from cross section of my some old design, it will help visualy understand (due to the lack of my engish) the design.
I am very suprized to see all those explanations and no one was even close.
BTW, I am out of this hobby and industry and not planning to get back any time soon. I got my self another hobby and enjoy it a lot more.
I am very suprized to see all those explanations and no one was even close.
BTW, I am out of this hobby and industry and not planning to get back any time soon. I got my self another hobby and enjoy it a lot more.
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