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Brian, Why not put the cam between the cylinders, I know yours would be different, but less machining. Twin I built, 35cc Cheers Andrew

I agree, but CAD has its uses, still have my drawing stuff and still use every now and then just to keep the hand in. Cheers Andrew

Rob, I ordered 1/16" to 5/16" end mills and reamers for doing model engines as most of the old plans(30's -60's) that I have been building use these sizes, just so I have them at hand. Cheers Andrew

Dave, I don't even run windows 11, and Autocad runs fine on XP on a stand alone comp, not connected to the net so nothing changes in the comp. I also have 8 and 16mm film and slide/negative scanners that the software wont run on any thing after windows 7 and no you can't get updated drivers, the...

Hi All, I'm still running Autocad 14 in XP( I have full programme on disc) on a stand alone comp. It's not connected to the net so no nasty updates. I don't use it much any more but is great when needed. Cheers Andrew

Hi All, May the Fourth be with you always Cheers

Hi All, Now just the engine, still need to do the 1/16" key way in the drive gear, then heat treat the gears. Cheers Andrew

Hi All, Had a couple of days off, my back was tightening up on me, so had a brake from doing anything. Had a good day today got the shaft, nut, drive flange, prop washer and bolt machined. All parts laid out and then assembled. The small nut that holds the gear on the shaft was 1/4"UNF in...

Brian, you may have to set them so it runs as well as you can get it to, then pin the levers to the valves. Cheers Andrew

We will remember them Cheers Andrew

Have both gears done. Cheers Andrew

It took me most of the arvo to do this one, but I have serious back problems at the moment. I would normally be able to cut this in about 30mins. Cheers Andrew

Hi All, We have a 20 tooth gear, see how I feel tomorrow to weather I do the 30 tooth one. Cheers Andrew

Will look at that when I get to that stage. Hi All, Drilled and tapped the gear(8 BA) Gear arbours done, nephew will be up after lunch, I will get him to lift the dividing head up on the mill Hope to have at least one gear done this arvo. Cheers Andrew

Hi All, Just an update, back has been good the last couple of days, got out and made some chips today, took all day but turned up two gear blanks for a reduction drive. Machined out of 4140. Felt good to do this. still have 6 #8BA holes to tap in the larger gear front. Will see how I feel...

Hi All, Just done another drawing in autocad, using Mod 1 gears, with the 20 tooth at 0.868" dia OD and the 30 tooth at 1.260" dia OD, with 1" centers, the mesh is 0.064", the depth of cut for the Mod 1 is 0.085, I can cut the gears with Mod 1 cutters(that I have), and with the adj cam on the...

The dimensions given in the plans are for the OD, he driven gear is on an adjustable shaft for the intermeshing of the gears, so there is enough adjustment to get the two gears to work with the 22DP profile. The OD of the driven gear(30 tooth) will be 1.454" dia. Cheers Andrew

Eccentric, I looked at that as well, have numbers written down for the gears, I also have the set of Mod 1 gear cutters, but as the DP22 gears will work with a 20/30 tooth gear set, I will just go that way, just have to get the cutters. For a plan from USA from the 1940's, they use BA threads...

Hi All, After doing some drawings(love autocad) with 1" centers, and a 1"OD small gear and a 1.454" larger gear with the offset of the adj cam setup on the driven gear at max offset, it leaves 70thou intermesh. the DP22 gear has a 98thou depth of gear, so it will be well within specs to cut the...

Eccentric, the ratio is 3-2, the 20 tooth gear can not be changed in dia, as it is on the engine, the 30 tooth, sits on an cam adj shaft so some adj for meshing is posable(90 thou of adj). The distance between the gears on the plans is 1", but can be adj either way as well. I got the 22DP for...