In the US, 4130 Chrome-Moly tubing is readily available from McMaster-Carr and Online Metals. The cylinders are designed around the stock size, leaving only lapping to dead-round.
PIP 3 Cylinder Radial
- Thread starter michael-au
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What size was the prop used on the engine?
I use either an 11x6 or a 12x6 Master Airscrew (nylon) prop. Pretty sure the one in the video is the 11x6.
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Totally agree. His CNC work has inspired me to leverage an old CNC mill I picked up last year and am still learning on. I love how Michael employed a jig to mount parts on for milling and flipping over for the reverse side op. Ingenious!
Not much done today, made all the liners the correct length and put the 30 deg taper on the inside bottom of them.
Played a round with the laser, and did some assembly
Played a round with the laser, and did some assembly
Machined the cut outs in two of the cylinder liners, these are to clear the slave rods
The liners were a nice push fit on to a mandrel and machined in the 4th axis
The liners were a nice push fit on to a mandrel and machined in the 4th axis
I have started to model the carbs in fusion360
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It's coming together well
How many times are you speeding up the videos as people may be getting the wrong idea of how fast you are running things at. I thought it looked fast the other day and now seeing you in this one has confirmed what I thought.
How many times are you speeding up the videos as people may be getting the wrong idea of how fast you are running things at. I thought it looked fast the other day and now seeing you in this one has confirmed what I thought.
I speed the videos up to 20x or 8x
The cycle time to cut the two slots using a 1/8" end mill and then a 1/16" to clean the corner out was
2min 27sec, the video speed was 8x faster so it came to 31sec
The reason is it cuts the file size down and also I tend to think people don't want to watch a video that is 5, 10, 15 or longer, minutes
I don't do it to try and make someone think it is a fast process or a fast machine, I thought it helps to show the setups, the mill and lathe have been converted by me
Maybe I should mention the actual cycle time with the videos
This is the Mill
This is the small lathe
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Nice. I switched over to FreeCAD once F360 started taking away functionality in the hobby version. I had to develop a post processor in the Path (cam) workbench module in the application. It now works well at converting the model to G code that works with my Dynapath Delta 40 Mill control. I did a quick test of the PIP slave rod, below.
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That part looks good, only a few more to go and you have an engine
The hobby version of fusion was good when it first became available, but now it has a lot of limitations
Agree it can put people off if a video is excessively long. On the odd occasion that I speed something up I just put something like x8 or x20 in the corner of the screen when editing the video. I also put mine up using Youtube so file size is not such an issue and there is the optin there to alter playback speed if anyone wants to.
I design in Alibre and just use F360 for the CAM, as I probably only use the CNC for a few hours a month so the loss of rapids is not much of an issue. Increased stay down time and a fast non engaged speed help stop the adaptives taking too long
I design in Alibre and just use F360 for the CAM, as I probably only use the CNC for a few hours a month so the loss of rapids is not much of an issue. Increased stay down time and a fast non engaged speed help stop the adaptives taking too long
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Any complaints with the bench top CNC lathe? I have a manual 13x48 LeBlond but would love to have an affordable CNC lathe.
No complaints now
Since I change the controller over to Masso it is really good now, never did like mach3 on the lathe and not having a computer is the best thing (it was about to die anyway)
The Masso takes a bit to get the hang of on the lathe, but once you get used to it it is good
Any problems are normal caused by the user
The cylinder take a while to complete as they have a lot of work in them, you are off to a good start
Got some more work on the carby done
The hole for the barrel didn't come out absolutely round so I will run a rear through it and hopefully that will fix it
I didn't have a reamer when I drilled it out so I have ordered a 10.5mm, that's about the closest to the size I will need
The hole for the barrel didn't come out absolutely round so I will run a rear through it and hopefully that will fix it
I didn't have a reamer when I drilled it out so I have ordered a 10.5mm, that's about the closest to the size I will need
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A little more work on the carby today
Got the fuel fitting and the cap to plug up the hole in the side plate, I used solder paste to solder these in place
I hadn't used the paste type solder before, it worked quiet well and there was no clean up after with solder running all over where you don't want it
First I made a fixture to hold the side plate at the right angle 25°, drill a .078" through in to the fuel passage, the a 1/8" .078 deep for the fuel fitting
Got the fuel fitting and the cap to plug up the hole in the side plate, I used solder paste to solder these in place
I hadn't used the paste type solder before, it worked quiet well and there was no clean up after with solder running all over where you don't want it
First I made a fixture to hold the side plate at the right angle 25°, drill a .078" through in to the fuel passage, the a 1/8" .078 deep for the fuel fitting
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Curious if you couldn’t use a small boring bar or
Looking great! The side plate and fuel inlet appear yellow in the photos. Are they made from brass?
Yes it is brass
It seem to get more of a yellow gold look after heating to melt the solder
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I’ll prolly just use low temp solder when I get to this. It requires less heat and the capillary action does its thing. I’m currently building an arbor for my Quorn T&C grinder. I have a new 46 grit cup wheel I’m going to use to rough the fin cutting bit from a 3/8’s hss blank. I have fine grit wheels mounted on arbors but they load up pretty quickly when taking off a lot of material.
