Thanks, yes the plane is from my own plans also, however the style of design is not mine. The original is by the Gratner Brothers. I just loved the look of it so much I wanted one. Mine is not going to have the wood vaneer, but will be more classic racing red style.
Ellery V-Twin 100cc Design & Build
- Thread starter cbooth
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Thanks Peter. 45 years!, I've been flying and model engineering for about 4 years, a long way to catch up
Thanks John. I made the first piston yesterday and it made me realise how big the thing really is.This is beautiful workmanship! Both engine and airplane are exquisitely executed.
100cc? FYI, I took a 3rd place in my first motorcycle race in 1967 on a 60cc bike. I would’ve loved to have had those extra 40cc, not to mention having them in a V-Twin configuration!
You sir, are an artist!
John W
a41capt
Well-Known Member
Well, as a retired firefighter, I’m pretty partial to red. I think it’s the perfect color! 
Cogsy
Well-Known Member
Do you not do this? I print out a workshop copy of my plans which I use to document changes, actual finished dimensions I've achieved, calculations or even just notes to myself as I go. At the end of the job my workshop plans are scrappy and sometimes barely readable but they've finished their job and can go in the bin (or saved in a pile for future reference if need be). I never use my 'good set' to work from.
Edit: I think I misread a typo in your post - I read "your on plans" as " on your plans"...disregard my rambling
a41capt
Well-Known Member
Cogsy, I’m with you! My plans, scribbled drawings and notes, are usually covered in greasy/oily fingerprints and smudges. Usually only fit for the trash can, but they’re all there and, like a trail of bread crumbs, lead me back to where I’ve been!Do you not do this? I print out a workshop copy of my plans which I use to document changes, actual finished dimensions I've achieved, calculations or even just notes to myself as I go. At the end of the job my workshop plans are scrappy and sometimes barely readable but they've finished their job and can go in the bin (or saved in a pile for future reference if need be). I never use my 'good set' to work from.
Edit: I think I misread a typo in your post - I read "your on plans" as " on your plans"...disregard my rambling
John W
Good catch. That should have read “your own plans”
sorry, it has been a while since I posted. Have made some further progress.
Pistons, gudgeon pins done.
Crankshaft (EN16) done.
Was waiting for the pulley and gear until I designed the tensioner. Seems to work ok
Another part I was waiting for was the carb. After a lot of deliberation (found it really hard to find out much about carbs and Walbro numbers) I went with an OS GF40 carb which is also Walro.
Made a splitter and an inlet trumpet then anodised.
My original plans for the both the inlet and exhaust was S/S. but came across 2 problems. My tube bender will not give a tight enough bend radius, and I cannot silver solder. Tried a few times and just can't get success. I suspect my gas torch is not powerful enough. So have changed the strategy at least for the inlets. Made these out of 2 parts aluminium and brazed together. it took quite a while to design the parts due to the double angles, but thats where drawing it in Autodesk Inventor really helps.
A while back i also partially assembled it and let it out in the sun.
Pistons, gudgeon pins done.
Crankshaft (EN16) done.
Was waiting for the pulley and gear until I designed the tensioner. Seems to work ok
Another part I was waiting for was the carb. After a lot of deliberation (found it really hard to find out much about carbs and Walbro numbers) I went with an OS GF40 carb which is also Walro.
Made a splitter and an inlet trumpet then anodised.
My original plans for the both the inlet and exhaust was S/S. but came across 2 problems. My tube bender will not give a tight enough bend radius, and I cannot silver solder. Tried a few times and just can't get success. I suspect my gas torch is not powerful enough. So have changed the strategy at least for the inlets. Made these out of 2 parts aluminium and brazed together. it took quite a while to design the parts due to the double angles, but thats where drawing it in Autodesk Inventor really helps.
A while back i also partially assembled it and let it out in the sun.
a41capt
Well-Known Member
Wow, I sure am hoping you’re planning on a video of that monster running! That is nothing short of impressive!!!
Thanks for sharing,
John
Thanks for sharing,
John
Nice machining and super nice cad work. I'm a Solidworks guy myself, but Your Inventor is doing a superb job.---Brian
Hi, I am not sure yet. I need to get it working first. Not too much more to do. Cam shaft and rings.
Thanks Brian, I only use Inventor as I have access to it through my work (although I understand it can also be downloaded freely for hobby use). I have also been playing with Fusion, which is similar in approach to Inventor. I have been using it to design parts for my RC plane and then cut out on my MPCNC.
Outstanding craftsmanship! My hats off to you.
Monster_Robotics
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Very nice work
Love this!! Beautiful work!
Very nice workmanship looking real smart. Am I right in thinking that Walbro carbs have a built in pump operated by the engine suction or am I completely wrong. Just something in the back of my mind tells me so.
a41capt, you say you raced motorcycles in the 60's. Did you race desert? I raced in sanctioned events in the early 70's in the California Mojave Desert. Here are a couple of pictures taken of me during a couple of events. I used 175 Yamaha's.
Grasshopper
Grasshopper
