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Hogan An airscrew prop has a lot of advantages, as it applies an increasing load as the engine runs faster, up to a point self limiting. A flywheel if the engine wishes will allow revs to rise to an alarming level. No need to whack your fingers just use an electric starter. Regards Barrie

Hogan Here are a few pictures of the disk valve that I made for the MB40 pylon racing engine, this replaced the rear induction drum valve of this prototype engine, we could never quite get as much power from the rear induction setups as the shaft valve version of this engine. Lohring Thanks...

Hogan With regard to starting characteristics there really is no difference between a shaft valve two stroke and a disk valve of the same cylinder configuration. You can get an engine running without resorting to rocket science on inlet porting, exhaust port timing on very high performance two...

I would be interested to know about your anodising setup? my anodising has been hit and miss, there must be something I am doing wrong. B.

Hello Rich I have used exactly the same settings with the CF PLA as normal PLA, I print at 220 deg C, with a 0.4mm nozzle and 0.1mm steps, I set a nozzle to bed gap of 0.075mm, for small parts I use 100% infill (solid), the printer is a Dremel 3D20 which my family bought second hand for my...

Hello Rich I have down loaded your Clan model and isolated the fuel tank cap. Attached is a print of the cap, this was the second attempt, the first printed vertically had some drop out of detail due to no supports. On the second print I layed the part conventionally and allowed supports under...

3D printed Clan 0.24cc fuel tank cap

Rich If you send me the model I will print one for you to see how I get on? I think it is optimistic to print the thread, I think I would leave that plain and run a die over it to create the thread. The CF PLA from Proto Pasta can be heat treated to resist 150 deg C, I don't think the Clan...

Creast An interesting project and some nice work to produce various parts. With regard to the carb cap , did you consider printing it in a vertical direction? Maybe make a sacrificial base where the cap fits to the engine to give stability on the printer bed. This way you would only be left...

Is it just a plastic part that you are needing, what do you think the chances of 3D printing the plastic part are? I have a 3D printer that is turning out decent parts but we need to see a part first and then model it. I am afraid it is a long time ago that I sold the switch unit from my V10...

Does it run well? Would be great to see a video. Barrie

Soldering Aluminium Aluminium solders like the best copper if it can be abraded and no oxygen is present, I have on occasions for very specific jobs soldered aluminium with normal solder and no flux as follows. Create a puddle of solder around the tip of the iron, then abrade the aluminium but...

Hello Chris From what you have said I think we can say that all of your problems have been an in correctly set Z axis travel. If we look at your numbers it tells the story, so you raised your work piece by 30mm then the prgramme ran, so what you effectively done was put the workpiece into the...

Hello Chris I think we might be getting somewhere!! The machine will home in the Z axis at the top of the Z column, if the machine is only being allowed to come down 195mm from that position, you may well be trying to work right at the limit of it's imposed shorter travel. I would set your...

Hello Chris Of course one thing that none of us have mentioned, especially seeing as how you are self commisioning the machine, has some kind of referance run been done to find the machine home positions. on some hobby machines this just means carefully running the machine up against...

Hello Chris Cogsy might have a point regarding setup of the Z axis travel, if the Z axis travel number is incorrectly set very low then the machine could just run out of travel. Are you able to manually drive the Z axis down to the table with a cutter in place (mind the table). I have...

Emgee That sort of thing can happen with CAM and post processors, the CAM see's some area it wants to machine and maybe close or next to and existing cut but it see's that it has to unengage the cut, hence the positive Z axis movement. I have to say though, I did not see such movements in the...

Hello Chris I will try and get a sample code set done for you this evening. Regarding Max Computer, I dont think they are particulary cunning or sophisticated so I doubt any clever conspiracy theories. They survive by providing software that is taken up by the education sector in Germany in my...

Hello Chris I rarely write programmes by hand, I generate code in a programme called BobCAD, sometimes I do the 3D designs in BobCAD and sometimes in other programmes such as Alibre Design or MOI. Mostly I like making RC pylon race aircraft, the wing and tailplanes of the models in the...