Scaled up Cracker
- Thread starter Seanol
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vlmarshall
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Nice wheels! I'm really enjoying this BiggerCracker thread. Sorry to hear about the 6 burned onto your wrist. 
...or is it a 9? or a G? maybe an e? q? p? d? b?
...or is it a 9? or a G? maybe an e? q? p? d? b?
Hi Sean: Andy and I enjoyed meeting you at the steam up and look forward to next month. Our steam-ups are as much good talk as running steam.
The wheels look very nice. They will work. Bring the rolling chassis to a steam-up for a test spin.
Arnold makes a good point on the spring. For Cracker it needs to be a light spring so there is a range of adjustment. Lighter is better.
The original Cracker has no throttle and no safety valve. The engine unit itself acts as the safety. If the pressure gets too high it will lift the cylinder off the port face. If you want to add a throttle, you will need a safety valve too.
I am going with a brass cylinder for Nina. You guys talked me into it.
Bob
The wheels look very nice. They will work. Bring the rolling chassis to a steam-up for a test spin.
Arnold makes a good point on the spring. For Cracker it needs to be a light spring so there is a range of adjustment. Lighter is better.
The original Cracker has no throttle and no safety valve. The engine unit itself acts as the safety. If the pressure gets too high it will lift the cylinder off the port face. If you want to add a throttle, you will need a safety valve too.
I am going with a brass cylinder for Nina. You guys talked me into it.
Bob
Bob,
No rolling chassis until I get gears!
With the larger size I need to recalculate the crankshaft and wheelshaft locations.
Not a big issue. You guys really got me interested in the large scale stuff. My wife is definitely tired of hearing about it.
Talk to you soon,
Sean
No rolling chassis until I get gears!
With the larger size I need to recalculate the crankshaft and wheelshaft locations.
Not a big issue. You guys really got me interested in the large scale stuff. My wife is definitely tired of hearing about it.
Talk to you soon,
Sean
