danny_galaga

It's a quad cam engine. There was a short animation on Sesame Street when I was growing up. Two kids are drawing. The first kid draws the usual stick figure of a person. The second kid draws the Mona Lisa. The first kid says "her eyes are too close together".

That can't be right, nev says he's the only one left in the world that can restore and renovate engines 😄

That's great, but you realise my beautiful Lamborghini engine block is not the only engine to not be perfect, right? And, since Lamborghini produced that engine for 50 years with just incremental refinements, I think it can't have been too bad a design. Not bad for the first engine they ever built 🤷‍♂️

Introducing the "Neville' 😀

What are you waiting for? The best sports car the world has ever seen is locked up in your head! You'll be the most revered auto engineer in history and no one will ever be able to fault your wonderful chassis, body and engine design. And all of us here can one day say 'we knew that guy when he only talked about being the best designer in the world. Then one day he proved it, and there was no doubt. He really was the best engineer that ever was, and ever will be' 😇

The Muira might be the second model. It's a beauty. The first I think was the 350 gtv , which wasn't nearly as elegant. I'm sure they learnt a lot building the first design. Sounds like you should design a sports car. You seem to know how it's done 😇 Highest price paid for a Muira. There was a low point with a lot of classic cars at one stage. I remember Nicholas Cage bought an ex Shah of Iran Muira for maybe $200,000 around 20 years ago. Anything from the Shah would have virtually no miles in it, so a good catch 🙂 https://www.hagerty.com/media/market-trends/hagerty-insider/4-9m-lamborghini-is-the-most-expensive-miura-ever-sold/

Mid engine, behind the driver. V12. One casting doesn't automatically mean the gearbox shares the oil. It makes for a more compact and sturdy structure. Funny you mention reliability. Ferruccio Lamborghini had a successful tractor factory. Successful enough he bought a Ferrari. But it kept breaking down, so he asked his engineers if they could make something more reliable 😇

To be fair, the main reciprocating part that might let go in a car would be a con rod.

One of the coolest car engine blocks would have to be the Lamborghini Miura. It was built like a motorbike engine- engine block, gearbox and diff cast in one piece.

Still, testing to destruction would glean a while bunch of info above individual calculations. For instance, say calculations tell you part A might break. Actually running a prototype until part A breaks might show that breaking that impacts parts B and C.

This is what went through my head when he said it. But those are rockers pushing on the valve stems. I haven't looked at the Merlin, whether it has overhead cams driving rockers or cams on valves. Unlimited hydroplanes used Merlin's and Packard's until the 1970s as well. Would be interesting to see what they did to boost performance. Miss Bardahl for instance ran at 3000 hp 😲

Wouldn't be surprised if some of those racing guys have made roller followers or equivalent for their engines

There are some newly manufactured parts. If you look at the link I posted, you'll see that pistons, rings and even three differently profiled camshafts are being manufactured. But clearly not fuel pumps as per my original post 😄

https://roushaviation.com/parts-inventory/

Totally agree..like I say, you can't get much breezier than an X mount on a gymbal 😇

I guess what I'm saying is that with the gimbal mount, if you are on a track where the sun is beating down on the screen, you can tilt it a few degrees down until the sun or your track has moved. It's all academic for me of course, test flying means there's no point even using a tablet. And when I'm done, I still haven't done my navs anyway 😄

There's heaps of options. I'm mostly referring to the gymbal part. What I have attached to that is the X type cradle that just grips the tablet on the sides. Virtually every part is getting free air flow.

I like the Ram ball joint mount because you can angle it how you want and if outside light changes (sun glare etc) you can just retilt it to suit the moment. Also if a passenger is helping they can tilt it towards them if they need

Dunno. You can't edit anything here after 15 minutes, so that could be tricky

Got it.

This is the list so far, rather scatologically ordered, for my Bushcat. But there are many Rotax options listed: Suppliers: Loravia.com - Rotax engine parts, France Individual parts: Radiator cap is BMW P/N 17112345074 at about 1/2 of the Rotax price (fitted to BMW motorcycle F650 with Rotax engine)." Radiator hose, section 106: Note: gates 03-0010 and 01-0007 are 25mm ID and will replace the rear two bends and the right hand side short straight piece near the starter. 25mm is a much better fit. 2 X 02-0951 (Datsun 120y lower radiator). Leftover 70 something degree bend from above 01-0007 goes on right hand radiator tank outlet. Oil coolers: Manufactured by setrab Part no. 50-110-7612 (Setrab Oil Cooler 210mm 10 row M22 female. Setrab part number 50-110-7612.) X 2. One has the brackets cut off. Radiator: Manufactured by setrab Part no. 50-925-7612 Fuel line: Gates barricade carburettor Regulator/rectifier: CARR5115 from vectriqparts.com.au Exhaust nuts: OEM - Bert Flood . the part number is 842950 - Lock Nut M8-SW12 Starter relay: Denso part 182800-1950 Same relay is used on Rotax Max Evo go kart engines. Much easier to find searching for that . Nippon Denso. Can get from Ecclestone aviation UK Starter motor (not 100% sure about this one). Aftermarket..suits BMW f650 https://www.stein-dinse.com/en/item-1-1524043.html#prettyPhoto Fuel pump: Pierburg 7.02242.32.0 - Fuel Pump https://spareto.com/products/pierburg-fuel-pump/7-02242-32-0 Not branded as Rotax, but from the same manufacturer. Spark plugs: DCPR7E NGK Dcpr8e currently on my engine as far as I know, there is no 'aircraft' version of this so just get them from Repco. 90 degree carby tube for choke: https://m.aliexpress.com/item/1005004164377398.html?spm=a2g0n.order_detail.order_detail_item.3.604cf19cHB72xq ZS Racing 90-degree Throttle Cable Adjuster For PHBG Keihin PWK PJ PWM PE Mikuni TM VM Carburetor Spare Parts Water/oil temp sensor: Aftermarket version, reviews well for 912 at aircraft spruce: UL FLIGHT LINE TEMP SENDER 150C M10X1.5 T-6 T-3 (bought from skyshop Australia) 17mm water hose replacement: Gates Silicone Hose in 5/8" (16mm) x 3ft, ON 2481 can be purchased from: SCA Item No. SPO3377117 $97.00/3ft Maxi Parts Product Code GAT 26241 $50.00/M Ignition modules. Better and cheaper: https://www.ignitech.cz/en/vyrobky/bikes/rotax/rotax_912_and_914/rotax_912_and_914.htm

When I first started the thread, it was just to say to folk it's a good idea to compile a spare parts list for their aircraft. But of course many of us are running Rotax so those parts will be common to many aircraft. I think the only way would be to trawl through not just this thread but many sources and compile a list. The problem being of course there will always be new sources. Talking of Rotax parts, was it you that was using the Vauxhall/Opel fuel pump? If so, how's it going so far?

Yeah, it was fixed pretty quickly and flying again 🙂

Pretty sure that goes for any aircraft

So funny I wrote this next, indeed, the kit manufacturer did end up going broke 😄