Cotswold Gryphon Kit Build

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crazydoug
Hero Steamer
Joined: February 12th, 2013, 7:51 pm

February 13th, 2018, 1:45 am #11

Great job so far-looking forward to seeing it completed. I found the same problem with silicone. Although i sometimes use old fashioned gasket shellac, i like to make gaskets from the old heavy paper grocery bags and a light coat of 30w oil. People who build engines only to run on air sometimes don't use gaskets or sealer at all, but it's a real surprise when you buy one of these and try running it on steam. I try to avoid buying engines only run on air for this reason, as it usually means a complete tear down to run on steam-and they ar after all STEAM engines. Good luck, the gaskets are worth the effort.
crazydoug
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Spot99
Steam fanatic
Joined: March 29th, 2017, 9:34 pm

February 13th, 2018, 4:46 pm #12

Thanks Doug, yes looking forward to steaming this one, but for now just a quick air test for timing and leaks.
A bit more progress today, another hour to spare, pouring with rain outside, so finished off the valves, set up the timing as per Cotswold's simple instructions, and then a bit more eye strain and aching finger joints bolting it all together.
Still very stff to turn over, but its early days yet and the engine needs to be run in, even after 50 seconds on air it has eased up a lot, so I am looking forward to a bit more tinkering and am confident that it will run nicely - certainly it is powerful, even on low air pressure.
Here are a couple of pics and a very brief video of the actual first run, you will be relieved to know I ran out of memory on my phone after 50 seconds. However, I was pleasantly surprised that it ran at all, let alone so smoothly. 😄
image.jpeg image.jpeg
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Dr. Rog
Steam Supreme Being
Joined: December 30th, 2008, 5:53 pm

February 13th, 2018, 9:16 pm #13

They are classy engines.
Where's the boiler???
Cheers Rog https://www.youtube.com/user/DrRogB/videos New positive, and successful motto for 2017: carpe diem
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Spot99
Steam fanatic
Joined: March 29th, 2017, 9:34 pm

February 13th, 2018, 9:22 pm #14

Dr. Rog wrote: They are classy engines.
Where's the boiler???
Easy tiger 😃 Its out of shot, about 3 foot above the bench on a shelf, waiting for the first steam up Rog, Cotswold boiler that I used last week to power the Stuart beam engine. 👍 
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Burnmafingers
Steam Legend!!
Joined: July 27th, 2009, 8:30 pm

February 13th, 2018, 10:01 pm #15

Great job on the build, Gryphons are really nice engines, smooth and powerful.
My 2nd hand unsteamed  example took a great deal of running in, I initially thought ai had purchased a duffer.

I don't suppose you know what type/spec the the countersunk screw for the Conrod to crank disc gudgeon pin is?
Fwibble

Monty
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Spot99
Steam fanatic
Joined: March 29th, 2017, 9:34 pm

February 13th, 2018, 10:40 pm #16

Burnmafingers wrote: Great job on the build, Gryphons are really nice engines, smooth and powerful.
My 2nd hand unsteamed  example took a great deal of running in, I initially thought ai had purchased a duffer.

I don't suppose you know what type/spec the the countersunk screw for the Conrod to crank disc gudgeon pin is?
Hi Monty, the honest answer is no, sorry I dont. Thread sizes are a total black art to me, and sadly Cotswold dont provide a detailed spec component list like, say, Stuart engine plans. I can cheerfully remove the screw, measure it, photograph it, etc but it might be far simpler to contact Russ at Cotswold directly, he is usually pretty helpful. However please do PM me if there is something within my limited capabilities that I can do to help.
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mazarowski
Steam Legend!!
Joined: May 2nd, 2016, 2:33 am

February 14th, 2018, 1:00 am #17

Excellent work Stewart. I wouldn’t want to use sealer either. The gaskets are definitely the way to go. That’s what I would do if I ever get one of these beauties! I like the blue color as well!


Mike

From Western Massachusetts, USA

Click here to view my YouTube videos
https://www.youtube.com/user/moresteam375
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Centrifugal Governor
Steam Legend!!
Joined: June 10th, 2010, 4:39 pm

February 14th, 2018, 1:34 pm #18

Great thread, Stewart. Initial running on air looks to be very smooth, with minimal amount of running in required. But then again, I wouldn't expect anything else from CH.... They are very nice engines indeed. Well done on the build & not losing any of the tiny screws ! 
Keep calm & steam on
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MrDuck
Steam God!
Joined: March 5th, 2010, 5:48 am

February 14th, 2018, 2:13 pm #19

Dr. Rog wrote: They are classy engines.
Where's the boiler???
Grab your broel toad and blow it full of air and gently put your foot on it to extract the air at desired rate.

Great engine, very good build.
Et in Arcadia Ego
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Dr. Rog
Steam Supreme Being
Joined: December 30th, 2008, 5:53 pm

February 14th, 2018, 7:52 pm #20

Spot99 wrote:
Dr. Rog wrote: They are classy engines.
Where's the boiler???
Easy tiger 😃 Its out of shot, about 3 foot above the bench on a shelf, waiting for the first steam up Rog, Cotswold boiler that I used last week to power the Stuart beam engine. 👍 
Oh goody. 🙂
ta
Cheers Rog https://www.youtube.com/user/DrRogB/videos New positive, and successful motto for 2017: carpe diem
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