Author Topic: GDB Inline 4 Cylinder OHV I.C.  (Read 2550 times)

Offline 90LX_Notch

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GDB Inline 4 Cylinder OHV I.C.
« on: August 19, 2018, 07:28:54 PM »
My next build has begun.  It is George Britnell's Inline Four Cylinder Over Head Valve Internal combustion engine. 

This will be a long term build due to work and kid related activities.  If updates are sparse please inquire with a post.  It helps me to find shop time knowing that someone is following along.

Engine Block:

The block is 6061 Aluminum and was first squared.

Somehow the pictures of the more difficult side are not on the camera.  I was stumped for awhile as how to get the .062 radius that is called for at the bottom corners and transitions.  My .125 ball endmill did not have the required length of cut.  I finally realized that if I angled the mill's head at 45 degrees I could machine and blend the required radii. 

Fortunately, I do have the pictures for the easier side.  I scribed the necessary lines and began to whittle away at the block.  Once the required angle was roughed, the engine block was transfered to a fixture plate that allows it to be set for angles in the mill's vice.  This particular angle fixture design came from one of the contributors of the "Shop Made Tools" thread at  Home Shop Machinist.  Once the angle was set the the block was indicated and clamped to the fixture with c-clamps. 

Once both sides were machined I started to do some hand blending with sandpaper and stones.  I still to do more blending but will hold off until the engine block is completed.

-Bob
Proud Member of MEM

My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Offline 90LX_Notch

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #1 on: August 19, 2018, 07:31:21 PM »
More pics
Proud Member of MEM

My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Online b.lindsey

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #2 on: August 19, 2018, 08:28:25 PM »
Good start on the block Bob. I will be here for the duration, no matter how long it takes :)

Bill

Offline 90LX_Notch

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #3 on: August 19, 2018, 10:51:37 PM »
Thanks Bill for jumping onboard. 

I'm excited for this build.  This is such a cool little engine.  I was blown away by George's video of it when I started in this hobby nine years ago.  We all marvel at George's work; but, to actually build one of his engines to print, really opens one's eyes to just how skilled he is.  To say it's humbling is an understatement.  My skills are going to get pushed beyond their limit.  But, that is the only real way to build skills.

-Bob
Proud Member of MEM

My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Online Tennessee Whiskey

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #4 on: August 20, 2018, 12:22:46 AM »
 :popcorn: and  :DrinkPint: in hand: Iíll ride along too Bob.

Eric

Offline gbritnell

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #5 on: August 20, 2018, 01:19:19 AM »
Bob,
Needless to say but if you have any questions please don't hesitate to ask.
I'll be following every step of the way.
P.S. You will want to put the cam hole in before opening up the crank pockets.
gbritnell
Talent unshared is talent wasted.

Offline 10KPete

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #6 on: August 20, 2018, 01:20:56 AM »
I think it's safe to say that many of us have a seat for this show!

 :ThumbsUp: :popcorn: :DrinkPint: :ThumbsUp:

Pete
Craftsman, Tinkerer, Curious Person.
Retired, finally!
SB 10K lathe, Benchmaster mill. And stuff.

Offline 90LX_Notch

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #7 on: August 20, 2018, 01:30:58 AM »
Glad to have you along again Eric.

Thanks George I appreciate it.  I've been able to figure out everything so far.

Thanks so much Pete.  I am happy that you coming along again for this one.

-Bob
Proud Member of MEM

My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Offline zeeprogrammer

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #8 on: August 20, 2018, 01:53:36 AM »
As I said in another thread...I'm watching.  :popcorn:
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline Roger B

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #9 on: August 20, 2018, 07:53:15 AM »
I will be following along as well  :ThumbsUp:  :ThumbsUp:  :wine1:
Best regards

Roger

Offline crankshafter

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #10 on: August 20, 2018, 08:31:19 AM »
Bob
I'm in for the ride ;)

CS




"I cut it twice, and it's still to short"!!??">#%

Offline deltatango

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #11 on: August 20, 2018, 08:48:19 AM »
Hi Bob,
I'm following this one as well. It doesn't matter how long it takes!
David

Offline 90LX_Notch

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #12 on: August 20, 2018, 08:23:35 PM »
Zee, Roger, crankshafter and David thank you for signing on for this journey.  Your support, as in the past, is greatly appreciated.  I'm hoping to make some progress this week and post it over the coming weekend.

-Bob
Proud Member of MEM

My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Offline fumopuc

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #13 on: August 20, 2018, 08:25:06 PM »
Hi Bob, me too, will wait for each new step of this build.
Kind Regards
Achim

Offline Sleddog

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Re: GDB Inline 4 Cylinder OHV I.C.
« Reply #14 on: August 21, 2018, 12:22:48 AM »
I've got my chair slid into position too. Right next to the popcorn :popcorn:
Looking forward to following along.

Jack