Recent content by Petit

Thanks all! Werowance i would advise giving it another try, alot of it is trial n error. I was only getting short bursts out of mine to start with. I literally spent hours just flicking the prop trying to get it going but i basically didn't have the settings in the right place and not enough...

Looking forward to seeing how this one progresses, i absolutely love Hit and miss engines n really want to build one but im kinda apprehensive at the minute.

Ok i'm back, Just dropping in to show you all the finished article, it has been finished for some time now but i haven't got around to publishing it on here. I'm extremely pleased to say that it runs! I only had to make 2 extra contra pistons trying to get the fit right, until i couldn't...

I have also purchased the plans, just make sure you actually save them to your computer. They send you a link to open the plans and then after so long the link will go dead, well mine did anyway. Saying that though they were more than happy to resend me the link again. I've been looking at...

Ah haaa yes thats it! Thats where i've gone wrong. For some reason i dont have that shoulder, now need to see whether ive made the front bearing to long or the larger shaft diameter to short. Ill report back. Thanks for your help guys!

Hi Steve thanks for getting back to me, i did wonder if it was supposed to butt up against the front of the housing, i tried that but it locks up the whole thing, i guess you the have to spin it to get the brass or alu to wear down until it frees up? The problem im getting is that i can get...

Ok im struggling to get the tapered collet and prop driver to hold tightly on the shaft, i cant tighten the propeller up sufficiently. Has anyone got any ideas? Are there any tricks to making this sort of propeller mount assembly? Cheers

Thanks for your kind words everyone. I have now completed the engine, managed to make a barrel lap and lap the cylinder to what i feel is a good uniform finish,i think i went down to about 20micron diamond paste (started at 40micron), any less than that n ill be polishing it. Managed to lap the...

Ok so after the tricky carb build I then moved on to the steel cylinder, was a reasonably straight forward piece to make, hardest part was cutting the bevels on the fins. Once i had completed the cylinder i moved on to the brass cylinder top cap and tommy bar, Next on the list...

.... More pics to follow when i get a chance

Ok back from the dead it may seem! Cannot believe its been nearly 2 years since i started this project, where does the time go!? Anyway as you can probably guess i've had some lulls in productivity mainly due to motivation but also im building it at work so i can only work on it when time...

Cheers Rob, yeah ive no idea how im going to acheive the fit between the piston and barrel yet, did contemplate using a viton o-ring but i think im going to give the original method a go first. Do u have any recommendations for honing the bore? I guess i may need to make a tool up for it...

Crank pin and m5 thread added on sunday night. Pin was drilled n pressed into the cam with abit of loctite retaining compound, used 4mm tool steel for the pin. Crank shaft is now complete. :)

Ok crankshaft was turned up lastnite, pretty pleased with it, still require pressing in the crank pin and putting the m5 thread on the end which i will hopefully do tonight. I work in metric so changed the thread from 10-32unf to m5, closest equivalent. Spent a while dressing up the shaft to...

Thanks for the advice Pete, i will definately bare that in mind.