Break in part1

By -
This is in my opinion,and I can't compensate my operation of break in.

I don't break in by break in stand.

Break in stand continue rotate fixed rotational speed.
Then thermal expansion lean on piston top exhaust area.
Then piston side does't scrape uniformity.

Break in on the car changes rotational speed.
It becomes short term heat cycling.
(Break in on the car? I can't translate well.Please teach me.)
When high throttle ,Piston expand and scrape.
When low throttle,Piston contraction and get lubrication.

I think heat cycling is most important for scraping uniformity of piston side.

But there are many ways of break in on the car.
Which is the bast way?

I would like to introduce two video of break in on youtube.

First Ryan Lutz method of break in.


Second Papa Tessmann method of break in.

The two video is so similar,
I think two have some different point.
Do you think what it is?
Do you think which is better?

Pro drivers teach us how do that.
But they don't teach me why do that.
If we understood why do that, we never fail to break in .

The answer is next time.
To be continued.

Comments

Post a Comment

Popular posts from this blog

Reliability of FUTAB

By -
Image
 It is a valid concern, as that reputation did persist in the RC community for a time. Here is an explanation of the current situation and why that "rumor" no longer reflects the reality of their high-end gear. Is Futaba Prone to Failure? (The Current Reality) The short answer is: No, the current high-end Futaba gear is exceptionally reliable. In fact, it is considered the global benchmark for durability in the grueling 1/8 GP Buggy category. 1. Where did the rumors come from? Historically, there were a few reasons for this reputation: Heat Issues in the Coreless Era: Older high-speed coreless servos pushed performance to the limit. In 1/8 GP Buggies—where vibration is high and races are long—these servos sometimes overheated and suffered board failure. Complexity of Early Tech: Futaba was a pioneer in S.BUS and telemetry. Early adopters sometimes faced "troubles" that were actually caused by incorrect settings or power supply issues, which were then blamed on th...
Read more

Arrma

By -
Image
I warry about Durango parts providing. AMain can provide parts after soon I put parts on cart or wish list. Probably they don't want to make dead stock. Then they watch customers need. I want bulk head. But it will stock on end of June. But I found another brand Arrma. Is the bulkhead same spec as DNX8? Is Arrma one of Hobbico brand? The picture is Durango. It is 2 dollars expensive.
Read more

Break In Part3

By -
Image
This picture is same type OS engine piston. But each engines take different way of break in. Already you can understand. Left side is running in,right side is stand in.  Each engine left side is exhaust side. Thermal expansion lean left side continued long time. Then piston top scrape right side only.  And piston side doesn't scrape uniformity. Stand in disuse piston. Not break in,only do break. It takes a balance by chance for short term. So I said heat cycle is very important. Heat cycling protect piston to lean thermal. Perfect break in is like this. Piston top scraping belt width is uniformity on zoom up shot! AND piston side luster is uniformity.
Read more