Author Topic: Microcosm M90- BBBBLOOOWN UP, SIR  (Read 214 times)

RedRyder

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Re: Microcosm M90- BBBBLOOOWN UP, SIR
« Reply #15 on: September 05, 2019, 09:44:22 pm »
Benny, your engine looks terrific.

Regarding an exhaust cap, if you are referring to those flapper lids on top of the stack, I recommend you dont do it. A hit & miss engine does not want a long exhaust pipe. The longer the pipe, the more it loses the ability to cool itself while free wheeling. A flapper cap will further exacerbate an already less than desirable arrangement by not letting cool air to travel back into the cylinder 20 to 30 times between firing. That's my 2 cents worth!

Again, it looks fantastic!

Gil

Dr.Rev.DelmarMacReady

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Re: Microcosm M90- BBBBLOOOWN UP, SIR
« Reply #16 on: September 06, 2019, 07:31:02 am »
Benny, your engine looks terrific.

Regarding an exhaust cap, if you are referring to those flapper lids on top of the stack, I recommend you dont do it. A hit & miss engine does not want a long exhaust pipe. The longer the pipe, the more it loses the ability to cool itself while free wheeling. A flapper cap will further exacerbate an already less than desirable arrangement by not letting cool air to travel back into the cylinder 20 to 30 times between firing. That's my 2 cents worth!

Again, it looks fantastic!

Gil
Thank you for that info, Gil. Cooling air was something I didn't consider. And many thanks for the feedback.
Bennydaheeb

Nick

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Re: Microcosm M90- BBBBLOOOWN UP, SIR
« Reply #17 on: September 06, 2019, 11:30:26 pm »
Thanks Gil, hadn't even thought of that
Nick

Roscoe

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Re: Microcosm M90- BBBBLOOOWN UP, SIR
« Reply #18 on: September 09, 2019, 09:40:07 am »
Was wondering about that pipe & flapper thing kind a figured it would cause issues. Thanks Gil, as always love your knowledge.
John

odu50

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Re: Microcosm M90- BBBBLOOOWN UP, SIR
« Reply #19 on: September 10, 2019, 02:25:02 pm »
Nice work, Beautiful finish

Dr.Rev.DelmarMacReady

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Re: Microcosm M90- BBBBLOOOWN UP, SIR
« Reply #20 on: September 10, 2019, 02:54:25 pm »
Nice work, Beautiful finish
Thank you for the kind words...I find camera angles are helpful when trying to hide blemishes :D
Bennydaheeb

odu50

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Re: Microcosm M90- BBBBLOOOWN UP, SIR
« Reply #21 on: September 10, 2019, 03:21:10 pm »
Exactly, I like the rustic side of the box

Dr.Rev.DelmarMacReady

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Re: Microcosm M90- BBBBLOOOWN UP, SIR
« Reply #22 on: September 10, 2019, 04:08:03 pm »
Exactly, I like the rustic side of the box
Thank you...I am lacking in fine finish skills like yours, and make do with simple rustic charm.
Bennydaheeb

 

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