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Finally the engine is alive! the recent weeks have been really busy at work, leaving not so much time for hobbing and delaying the fire up. But at last the final bits were assembled and after a few mods to the fly wheel, the engine run for first time. The progress from the previous post have...

Hi peterha! The chain is a 6mm pitch, from Chiaravalli (Ref. CAT. RCX P.6 SEMPLICE ISO9001). I bought the sprockets from Technobots, 04B, z=8 and 16 (Ref. 4804-008, 4804-016). Spur gears are from HPC Gears, m=1mm, z=24 (Ref. G1-24). Both sprockets and gears are then machined to suit my design...

Hi artist334, thanks for your comment. Valves are within 0,01 mm tolerance, measured with a digital Vernier Calliper, so cannot guarantee this is absolutely correct. I usually turn up to 0,02-0,01 oversize, and then use SiC paper to achieve better surface finish and the desired final size, up to...

The spark plug is almost ready to assembly. Last weekend I almost finished the individual components, including the ceramic bits machining. The ceramic machined quite easily, but it was very challenging because of the wall thickness required (<0.5mm in some cases). The only bit missing is the...

Thanks Swifty, what you say makes a lot of sense. I just wanted to make sure that there was no other reasons. :)

Hi there, it´s been a while after last post, but batteries fully charged after the summer break. Hope you all had a good time too. The engine head has been assembled and is almost completed. All four valves, rockers, cam shafts are working together. All is left is the valve lapping and cups to...

the reason for not using the same design is that the cam cover is quite a complex part to design and machine, as it is very thin and full 3D machining on both sides. Using the brackets is a simpler way to do the same job. The function of the brackets is to hold the cam shafts as the covers will...

This weekend I have made some progress with the engine head. The inlet and exhaust ports have been polished and valve seals have been pressed in. It all went quite nice together. I used some Dremel tools and polishing compound to polish the ports in the inside, with extreme care to not damage...

Thanks for your comments e.picler. I am using Visual Mill for CAM and Mach3 as the controller software. I only use the CAM software, although for really simple operations I type the code at the machine as it is quicker. I have a Belflex BF 520c TME manual lathe. To be honest I have not...

Gents, interesting discussion here! I am not a professional engine designer myself so this is good for learning. The process I followed to dimension the engine was: - V8 F1 Engine (roughly) based on existing literature: Bore 97 mm, stroke 41 mm, con rod about 102 mm. This scaled equals to...

Thanks guys, I think any of them will do. I will check what is easier to get.

Hi there! I have virtually completed the lower assembly of the engine. The crankshaft is finished and finally assembled with con rod inside the crankcase. You can see that the crankshaft has 6 holes on the counterweight area. These will be filled with tungsten bars. This is to adjust the...

Hi Dieselpilot, I am glad you saw my website already. There are many RC engines at this range of stroke, but as you say not with this level of bore/stroke ratio. I went for this construction as a) it is aimed to high revs (above 10000 rpm) b) I want to create the 1/3 scale of the real...

I have got an Optimus BF20 L vario with CNC kit and rotary table. I am still a long way behind with CNC machining, but I have been learning a lot with the recent engines. Also a manual lathe.

Hello Gents, I haven´t posted much on the forum before, but I decided it is time to show some of my projects. I have successfully made some RC F1 cars in the past and some working 4 stroke engines, ( see here www.bernimodels.com). At the moment I am working on a F1 RC 1/3 scale car. It is a...

Thanks for that joshagrady ! ;D I like to see there is this kind of meetings around my place and a really interesting community as well. I will keep an eye on the next meeting.

Hi joshagrady, this would be really appreciated. I'd love to participate. ;)

Hi there! It's my first post in this amazing forum, although I have been learning already a lot from you guys for a while now. I've been building scale model cars since 1998, starting at a very basic level and progressing over the years. Please feel free to visit my website...