Your coolant line is kinked between the Y fitting and the firewall. That line also looks way too small to supply appropriate coolant flow for 12 cylinders. Likewise, the fittings on the radiator should be enlarged to match the bigger line. And all hose connections should be safetied in place, not just hand-pushed in place, particularly with silicone hose which is so easy to pop out.
An idea I am experimenting with on the Iron Bay regulator I have. Put an air fitting to the atmospheric side of the diaphragm, and block the vent. Use a miniature 5 volt air pump to create air pressure, and use a remote needle valve to allow the pressure to bleed off. This allows you to have a slight, controllable fuel pressure to the carburetor. It aids in priming, and hopefully will allow me to tune out the rich midrange problem I have when I use zero percent nitromathane fuel.
Fascinating,I was a member of 3 sisters MAC as a young man,a guy there called Ken Morrisy was the rep for Irvine engines,he showed us many wonderful things,prototypes etc.
Cooling this layout is a big question. Also a two stroke doesn't need 12 cylinders to sound right. Infact it will sound wrong. A six with the same capacity will sound like a twelve. So why not simplify it?
What about using oil cooling of the cylinder jackets to aid the existing fins? You already have oil pumps. Oil, air and a richer mixture might win the battle.
2 stroke is simpler and cheaper to develop and manufacture and also better power to weight ratio than 4 stroke. It is a project I would like to try once we have the 2 stroke version in full production. It has been a big challenge to get the 2 stroke engine to a flying state.
Awsome! I just had a look at the V12, just out of pure curiosity - this is even more awsome! A pity I never had the opportunity nor the means to get into model aircraft, just 'collected' model engines. And now at an quite advanced age .....
Nice one Phil, I have the red, black, purple and pink diesels. The red one doesn’t have a provision for the exhaust to bolt on so I assume it runs without one. I also have your V4. Nice little engines.
another great video Phil. These vids really help the intricacies and brilliance behind the Lesley V12. A very elegant improvement to the electrics - regards markc
This is a remarkable accomplishment! What a beautiful piece of engineering and machining. So impressive. I would think this engine is easily capable of powering a 1/4 scale P-51 or Spitfire. The larger size would make installation easier, too! Well done!
Yes the cylinders do fire in pairs. This is to provide positive sump pressure for the 2 stroke induction part of the cycle. Also it sounds better as it gives 6 exhaust pulses per revolution. This engine runs at a max of 6500 RPM , a rolls royce merlin ran at about 3000 RPM .
@@PhiltechEnterprises I would have imagined it would sound like an Inline 6, given that the cylinders fire in pairs, but it really does sound like a 12. Nice
Claming around an object it would be weak because it relies on the springy contraction of the 4 jaws. That is a big drawback. The other big drawback is lack of rotational adjustment. When you screw on the jaws part to the chuck you are limited by where it rotationally stops, and that is also lacking precision because the angle will be affected by how tight you screw it on.
Regarding the comment about relying on the springy contraction, it has the advantage of having contact with most of the diamater of the part it is holding. The main reason for using this product for when you have a difficult item to hold ie. a thin walled tubular part or a non round item that requires a custom machined cavity. You may need to adjust your depth of cut to allow for the gripping pressure.
@@wizrom3046 I suppose so, but the clamping ring datum will be referenced on the 4 Aluminum moving " jaws" that do not open or close parallel to the centre axis. They individually swing hinged on their bases at the bottom of the slits. I would expect the questions in the comments to have been addressed by now.
Yes you are correct that when holding on the outside of the parts the flexi chuck relies entirely on the flex of the arbour. It is worth noting that unlike a 3 jaw chuck the flexi chuck has contact with most of the diameter of the part. Also we produce the adaptor in machining grade aluminium (2011) and also high tensile grade (7075) for when more grabing pressure is required.
While it is correct that they adaptor pivots from its rear, if the flexi chuck adaptor is machined as close as possible to the diameter of the bore of the item it is holding ,then the ends should stay parallel and not flare out.
@@PhiltechEnterprises Thanks for the reply. To hold on the range of different bore sizes produced during a production run the adaptor will have to be machined to just under the bottom limit. Therefore all but the bottom limit parts will only be gripped at the end of the adaptor and theoretically only on the middle point of each segment end. This feature is overcome on 5C and R8 type collets by making them with much longer more flexible leaves that allow the location area to flex into the parts bore.
In Australia, we call them dye craft chucks. They were popular back in the 60's - 90's. Sadly, they are no longer manufactured here, but I still have some blanks for mine.
We are based in Australia and decided to build the flexi-chuck because the Dyecraft chucks were no longer available. But we decided to make some arbours to allow it to be more easliy fitted to machines.
I didn't realise it was a 2 stroke, and water cooled. There must be a few design challenges right there. I have a Flexi Chuck. Saw the brochure in the background. Cheers, Preso
