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  1. T

    Merlin Engine Restoration Photo Album.

    Piepermd, This reply really fits into the hopefully "Better late than never" category, sorry Piepermd. One of my worst traits is that I don't always revisit websites where I've posted something, like this Merlin stuff. Well, almost never, it seems. I was surprised that my login credentials...
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    3D printed intake manifold for LS3

    OK, you had me at 3D printed manifold. I can't tell you anything about the clearance between an LS3 and its cowling, but I have seen a few printed manifolds. The nylon that I use is born at 170 Celcius, but softens well below that. I agree that a Markforged Onyx part, maybe with some fibers...
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    Question about Weights, Balance and Forces

    Yup, this forum is the best. You math guys. If I see this correctly, PiperCruisin's H-Tail (downward) lift is in the 285 to 350 pound range. That's a fair bit higher than earlier estimates, but not by orders of magnitudes. So I think I have a general sense of tail forces, for smallish...
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    Question about Weights, Balance and Forces

    OK, this is all good. But boiling it down, can we assume that in steady level flight, a Cessna 150 has a downforce applied by its H-Tail of around 100 to 150 pounds ? And daring to push my luck, a larger plane would have a larger downforce being applied by its tail ? Cheers, Tom.
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    Question about Weights, Balance and Forces

    But why would I ask this, you ask ? Well, I will tell you. Let's transport ourselves to a different place and time. Your name is Frank Towns and you've just crashed your Fairchild Flying Boxcar, and you have to patch together a new airplane named Phoenix, made from pieces. No wait, the...
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    Question about Weights, Balance and Forces

    Right, thanks to all. I had meant in steady level flight, typical cruise setting, at a moderate altitude, approximately middle-of-the-road CG, with Walmart having a sale on Bick's pickles, on that particular day. I know there are more variables here than a golf swing, but I tried to convey a...
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    Question about Weights, Balance and Forces

    Hi Aircraft Guys, An odd question perhaps, but let's take a simple aircraft as an example. The mighty Cessna 150. If the aircraft is loaded and balanced properly, what sort of tail forces are generated in steady level flight, all nicely trimmed ? I mean, how many pounds of force downward would...
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    Mustang Prop Arrived

    Oh awful. I didn't know that was the outcome. Were there any injuries or worse, fatalities ? I can't imagine putting years of effort into this to have it wrecked that way. Tom.
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    Mustang Prop Arrived

    So I'm curious, are there any new updates beyond this point ? Did the 4 "paddle" blades work out ? And are you flying ? Thanks, Tom.
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    Merlin Engine Restoration Photo Album.

    Oh, and CAD drawings of the V-1650 Merlin are available on aircorpslibrary.com It costs about $5 us per month, but they have thousands of Merlin part dimensioned drawings. Cheers, Tom.
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    Merlin Engine Restoration Photo Album.

    Ely, Sorry about my long absence. I haven't visited Homebuiltairplanes for a long time. Now, your machined 1/4 scale replica looks SPECTACULAR !!! And unlike the Richard Maheu version, yours has the 2 stage supercharger, which makes you possibly unique. Since it's been a couple years, how has...
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    Merlin Engine Restoration Photo Album.

    Newly Printed merlin Parts Hi; Here is a picture of an aftercooler heat exchanger box from a 2 stage Merlin. It's a Header Plate and Header Tank. The aftercooler heat exchanger was responsible for cooling the incoming charge of air and fuel. Although we now call these things "intercoolers"...
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    Merlin Engine Restoration Photo Album.

    Update on Merlin Cylinder Head, 3D Printed Here are a few pics, more posted on my Flickr site. The 12 parts of the cylinder head are now complete and seem to fit well with the skirt. It'll take me a while to glue all parts together, and fit in the valves, but I'm happy with how it all looks...
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    Merlin Engine Restoration Photo Album.

    Hi Cheapracer; My goal is to create a set of parts that I am missing, to complete a static restoration of a V-1650-9 Packard Merlin. To be honest, my engine will be a bit of a mutt, with original and replica parts from a few different Marks mounted on it. Unfortunately I'll have to live with a...
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    Merlin Engine Restoration Photo Album.

    Hi Cheapracer; My goal is to create a set of parts that I am missing, to complete a static restoration of a V-1650-9 engine. That's a Packard Merlin. To be honest, my engine will be a bit of a mutt, with varied parts and/or replica parts on it. Unfortunately I'll have to live with a static...
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    Merlin Engine Restoration Photo Album.

    Hi Avi; I don't know the length difference between the Mk IX Spitfires, and earlier Spitfires with single stage superchargers. However, closely related, I might be able to answer how much longer is a late Merlin (probably post war) and an early Merlin, something like a side-entry-supercharger...
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    Merlin Engine Restoration Photo Album.

    Everyone Stop ! You're working too hard. You need a short break. Here it is; I just thought I'd post a few more pics of the port side Merlin head in its current model stage. It might seem hard to believe, especially when you compare these pictures with my last cylinder head model pictures...
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    Merlins

    Miss Bardahl and Atlas Van Lines used Merlins. Miss Supertest and Miss Budweiser used Griffons. This list is certainly not exhaustive, by any means. Many used Allisons as well. Tom.
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    Merlins

    Hi Avi; Yup, it's a pretty incredible facility when you consider all their inventory. Enormous collection of Merlin stuff. Thanks for showing me this link. Tom.
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    Merlin Engine Restoration Photo Album.

    Well, it's been quite a while, but I have some progress on my Merlin restoration, at least, in the CAD world. Here's a few pics of the port side cylinder head that is getting very close to being print-worthy. Some of you might spot a few things that need finishing, such as all the holes that...
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