Author Topic: Muncaster's Grasshopper  (Read 6884 times)

Offline bruedney

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Re: Muncaster's Grasshopper
« Reply #30 on: April 19, 2018, 05:04:09 AM »
Thanks Julius
‘Results! Why man, I have gotten a lot of results. I know several thousand things that won’t work.’ — Thomas Alva Edison

Online Jasonb

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Re: Muncaster's Grasshopper
« Reply #31 on: April 19, 2018, 07:04:50 AM »
Thanks Julius, I do think it looks nicer with the twin beam and the slim rods between rather than the forked ends.

Offline kvom

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Re: Muncaster's Grasshopper
« Reply #32 on: April 24, 2018, 03:22:28 PM »
In examining the Solidworks parts I noticed that the cylinder is larger on the new version than the old.  I emailed Julius about this, and he replied that the split beam version is 1.5x larger than the previous.  That means that the cylinder is 218mm or 8.5" long.  I think building to this size would be a challenge for most.  My plan is to build the engine, but I believe I'll use the V1 model plus the V2 beam that I'll scale back.

The V1 cylinder is 130mm or 5.11", still a challenge.  If I can find appropriate size hydraulic cylinder tube with a honed ID I'll use that.  Bore is 45mm (1.75"), but I suspect that's larger than is really needed.

« Last Edit: April 24, 2018, 03:53:41 PM by kvom »

Online Jasonb

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Re: Muncaster's Grasshopper
« Reply #33 on: April 24, 2018, 04:18:31 PM »
Or you could convert the metric into imperial using 1mm = 1/32" which will bring the sizes down closer to the original. Scale the cad drawing by 0.79365 to get the same result

Offline kvom

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Re: Muncaster's Grasshopper
« Reply #34 on: April 24, 2018, 05:50:12 PM »
Both my CNC mill and th manual machine DROs support metric measurements, so I'm going to try to stick to metric dimensions except for fasteners and their holes.

Offline bruedney

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Re: Muncaster's Grasshopper
« Reply #35 on: April 25, 2018, 01:14:31 AM »
Hi

Just started redrawing using Julius' latest version but, like kvom, I am scaling it down by half where I can

Julius, I have found a few issues so far with some things missing as below.
1.   There is no end part for the base that is under 1-01.4.
2.   There is also no holes for fastening said piece to 1-01.1

These are not critical - Just thought you would want to know

Thanks again for these awesome works of art

Cheers
Bruce

« Last Edit: April 25, 2018, 01:18:46 AM by bruedney »
‘Results! Why man, I have gotten a lot of results. I know several thousand things that won’t work.’ — Thomas Alva Edison

 

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