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    Verner S9 vs Rotec R-3600

    I dont fly, but I have past experience with Rotec. I will only state facts, not opinions. The 1st motor was originally scaled up 7 cylinder inspired from a saito, 350cc with no reduction, for RC use, only one made. The 2800 7 cylinder was born from this, by 2 brothers in Melbourne, Australia...
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    Ducted Fan propulsion

    Does anyone think that 2 externally mounted ducts on a delta wing mounted just above the wing, at the rear and each side of the above blended fuselage seem like a good idea? At high alpha landing would the ducts starve? Or would the ducts draw more air over the wing and lower the stall speed...
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    Delta wing attach looking for ideas

    Hi bill, i got the same ideas for a small craft, a side by side 2 seat, twin duct pusher of a mid mount subaru ej (a risky plane). My ideas for safety involve the roof detaching and parachuting (ditching). Kinda like a sliding of a motorcycle rather than fighting for control...
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    Slow delta wings?

    Most deltas seem to be short and appear to have a centre of pressure not far behind the centre of gravity. In a pusher arrangement, be it high or neutral thrustline, I'm wondering if it may cause some wild dutch roll motion? Maybe this is why tractors are preffered, I'm thinking F117 with the...
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    rotec 2800

    I heard he just moved to a new factory and is flat out making water cooled head kits for jabiru, they have a landline telephone, you should call him - he may not get the time to answer emails so readily.
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    Ducted fan aircraft

    Mixed Flow In-line Fans Wasn't this a discussion on ducted fans? All of sudden it's a build thread?
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    Ducted fan aircraft

    Cool plane! Can't wait for the youtube clips. Unsure if this is the right thread for this or to start another; what do you guys think of mixed flow fans for propulsion? Dyson use them, airliners use them for the toilet vacuum pump, Troybilt make a great leaf blower with them. My understanding...
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    Internal Ducting in a Delta Airship

    I was looking at the d y s o n brand fan recently thought it would make a cool airship shaped like a tube, an airfoil lathed in section. Patents are recent, you'd have to pay royalties though.
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    Where to find complete blueprints ju88, Do-17, bf-110 for full scale replica ?

    Maybe volunteer at a local air museum and pick a display to fall in love with, camera, tape measure, 100's hrs on cad. It (blueprints) probably wont come your way to easily, maybe? Maybe not?
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    Beginner's welding equipment

    Haunt the sunday flea market for an old single phase, shunt wound arc welder for about $35 max. You'll never break it, it'll weld forever. Be careful for these all in one Ch1ne$e welders with mosfets, arrrgh, i'm living a nightmare with that peice of cr@p!!!!:dis:
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    Volvo 5 cylinder turbo.

    The engine blocks sure look the business, deep webs, pressure cast alloy. The crankshaft is of some concern, a nice forging but the counter weights are a bit huge. (I am not the originating source of the images)
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    Volvo 5 cylinder turbo.

    Is the volvo b25 worthy of note? Thinking a turbo under the sump for a long, slender cowling. The range rover v8 seems the benchmark, could the b25 add turbo outclass it for power to weight? I've lifted a subaru bare block and Vw type bare block and the suby weighs a ton more, I'm not totally...
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    Vectorizing old plans

    I've used microstationJ from 1996 for tracing photos for the last 16 years. Simple, easy, rolling circles out tangentially to other circles always gives you a good basis for solid modelling the contours in other more advanced cad packages. You will spend more time cleaning up vector art and...
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    Albatros D5a Project

    900kg in our language, we in oz are only allowed 600kg for a homebuilt, this build is in oz so iron block is most certainly a no go. Well, I sure hope Sheppo can check back in soon and give us an update. I feel like I'm thread jacking this, Sheppo, please come back??? :dis:
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    Albatros D5a Project

    If you wanted to build an engine, you'd need a catpillar C13 crank and lower internals, 6 lycoming barrells/heads/pistons/rods, you'd need to take a heap of steel of the crank to bring down the mass. Cast your own lower case and sump in magnesium, these are only large brushstrokes, it could be...
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    Albatros D5a Project

    Hi Shep, have you considered an EL ford falcon engine? I have unreliable information of google that they weigh in at 195kg bare engine. At that weight, with bespoke wafer thin manifolds and direct drive, maybe even stroke it with 300ci usa ranger truck crank? It wont be easy to keep the weight...
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    Lancair crash in santee, CA

    Mate, I've taken an interest in the lancair trying to figure out planes issues, it seems to be down to the main wing airfoil. It looks like a modern roncz canard foil. My assumption is this; the airfoil they chose was design for a canard fixed to fuselage, they have used it for a main wing with...
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    Ultralight/microlight replica jets?

    I would scour all the boneyards for an early 737 tail, use it as your main wings and design a fuselage to fit the donor parts and pilots with a low drag shape. Turn those elevators into 2 big old elevons!!! Even with a leg up on surplus reducing your lead time for building, it's still a big job.
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    VW / Chevy 8 cylinder open source project.

    Oh my, forget the boxer - here is a new direction. An inverted, air cooled V8 for Storch replicas based on VW and Chevy parts? I got the idea when researching low airspeed landings (Australia - 45knots - Delta design in the waste paper basket) This one would be the go, lots of people have a...
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    Verhees Delta

    I recall somebody in the 'slow delta wing thread' mentioning a set of rules with these designs being zero camber and thick chord at the root, tapering to thin chord mildly cambered with some change in angle of attack (negative twist). This troubled me, and I reckon its garbage, look at the...
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