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Check the link and see what you have on hand. https://www.homemodelenginemachinist.com/threads/not-bad-for-a-college-student.34303/post-381344 Aluminum vs aluminum: Bad - But I saw a forum member use them and the engine ran quite well, and I also made stirling engines with aluminum pistons and...

Hi All ! There are many ways to make dividing plate Thanks for your comments and thanks for sharing !! I just finished a dividing plate A 40 and 35 hole plate The 35 hole plate had 1 hole in the wrong position, I fixed it by pressing a small pin and re-drilling. On the 40 and 35 plate there...

K2 ! 39 or 35 makes no difference in the way the gears are made. It just depends on the diameter of the dividing plate.

39 can also be 35 , it is used to cut odd gears . Yes , accuracy in creating the plate is exceptionally important. I have made some gears myself, it is not precise but good enough for model engines, But to determine the precision needed for a homemade DIVIDING PLATE and make a good enough gear I...

Hi K2 I read your posts in this thread but they don't fit what I have : I don't have odd gears , but your comments will help someone so I'm silent . my fault : PANME This is my idea

Hi All ! Thanks for the comments I am thinking about this machining method I will use a panme to adjust, calculate the ratio between mm and 1 degree from there deduce 0.2 or 0.25 degrees is how many mm of panme. For example: 1.5 mm of panme then the angle will rotate 2 degrees, if I need 0.23...

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Thanks for the comments ! 👍 I am planning to divide the degree and drill each area to limit the error I will divide it into 3 areas : from 0 - 120 , 120 - 240 , 240 - 360 Start drilling from 0 --> 120 , 120 --> 240 , and from 240 --> 360 If the deviation is 0.05 degrees ( A pretty crazy...

I don't have , I wish I had one

DIVIDING PLATE ..DIY ..Help...!! I am finishing the gear cutting tool, it can cut spur gear and Helical gear I am making a dividing plate to cut gears The outer diameter is for cutting even numbered gears, the inner is for odd numbered gears The outer diameter is relatively easy to divide by...

"Project a small"... But quite interesting ... Congratulations and thanks for sharing ! 👍👍👍

My little experience with home made 10cc diesel engines The compression ratio is good enough to run the engine on diesel is 18 -->20 : 1 But not enough You have to make sure the tolerances of the piston, rings and cylinder are within a good enough range to achieve that compression ratio You...

Changing the flow affects the timing : Yes - But how much !!? 5 degrees of camshaft will be 10 degrees of crankshaft 10 degrees of camshaft will be 20 degrees of crankshaft Like IC ignition engine, ignition timing and injection timing have a period of time for the engine to run well enough, like...

That was the problem from the beginning and I also said Some people translated for him and replied to him , I don't understand for what ? to prove that friendly ? to prove that know more languages ??...?? Rules are rules . Forum rules are applicable to all !!!

Same old saying: never reach 700 degrees C !!!! Ook...Ook....Ok....I stop here !!!!

It is based on absolutely perfect conditions, which in reality are never achieved. Flash point is different from auto ignition temperature !!!!

Xander ! 👍 👍 👍..

Compression ratio depends on 2 factors: r (radius) and h (length) There are 2 types of h: h1 is the piston stroke and h2 is the combustion chamber If you choose compression ratio 20:1 From there you calculate the ratio of h1 and h2 If you choose h1 stroke then you can calculate h2 and vice versa...

👍👍👍 That's one way . Exactly..Fun !! 👍👍👍 As I said in MEM, I'm not sure what the outcome will be For now I'm listening to everyone's opinions...I'm doing some experiments...see the results and find a way to make it as small as possible Maybe I'll fail and maybe someone else will succeed by...

Sorry I am not an expert ;)