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Hughes H-1 Racer for Q-40 - 4/10/2003 3:54:55 AM   
PylonWorld



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Joined: 12/29/2001
From: Monroe, NC, USA
Status: offline 		I'm getting ready to start on a project that will result in a fiberglass fuselage and composite tail that is a Q-40 legal replica of the Hughes H-1 Racer. The first version will use the [URL=http://www.rcuniverse.com/forum/tm.asp?m=254364]Swee' Pea[/URL] wing.

I'll be showing details about how the plugs are made, all the way to the finished result.

For a look at the Hughes Racer, check out this link to [URL=http://www.airandspacemagazine.com/ASM/mag/supp/AM03/h1rr.html]Air & Space Magazine[/URL]..

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Hughes H-1 Racer for Q-40 - 4/10/2003 8:24:30 AM   
PylonWorld



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From: Monroe, NC, USA
Status: offline 		Here is a cutout of the profile of the fuselage. I left the spinner and the radial cowling in place so I could see how it would look with the cowl on.

The cowl will not be used on the Q-40 since it would enclose the engine, plus Q-40 noses don't even come close the real thing on many planes. But some people may want to fly the plane as a sport scale racer, and I will do a cowl that can be attached for a more scale appearance.

The spinner is 1.5" and the fuselage is shaped such that engines that use the OS 46 FX standard mounting pattern will fit.

In keeping with the current trend in many Q-40's, the nose moment is fairly short at 7" from cowl ring to wing leading edge. The tail moment is pretty long, so it should groove well.

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Hughes H-1 Racer for Q-40 - 4/10/2003 8:43:17 AM   
beardking



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Joined: 12/11/2002
From: The Colony, TX, USA
Status: offline 		I want 2 of them, are they ready yet? Better yet, if you could do a Spruce Goose for 8 .25 engines, I'll take one of those.

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Re: Hughes H-1 Racer for Q-40 - 4/10/2003 5:56:44 PM   
Bill Vargas



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Joined: 1/6/2002
From: Team Coldies, CA, USA
Status: offline 		[QUOTE]Originally posted by PylonWorld
For a look at the Hughes Racer, check out this link to [URL=http://www.airandspacemagazine.com/ASM/mag/supp/AM03/h1rr.html]Air & Space Magazine[/URL]. [/QUOTE]


Very Cool,,, I didn t know that Huges had a Racer II,,, I'll bet he was Fast



BV

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Radial-engine designs for Q40 - 4/10/2003 10:26:44 PM   
DHG


 

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Status: offline 		Don,

Just a cautionary note: running without the cowl -- a distinctive feature of any radial-engine design -- may cause the Q40 design approval committee to scratch their chins and maybe reject it.

Once upon a time, I sketched out a Sea Fury that looked reasonably convincing with a 3-inch-diameter (7.1 sq. in.) cowl. The cowl would've been molded from the inside contour of a cute little 2-handled kiddie mug we got for our daughter ... I still have it ... always wondered how that would've worked out. Yes, that's a lot of frontal area to put directly behind the prop, but it pretty well hid most of the engine cylinder, crankcase, venturi, fuel lines, etc., and that draggy crankcase-to-muffler joint. I notice those Club 20 airplanes that Paulus & his group are playing with seem to trade off a little extra frontal area for smooth flow around that area.

Also, 7.1 square inches is less than the 12.5 you have to have at the cockpit, so it's not as though the airplane would be hopelessly oversize just because it had a radial cowl.

Veddy interrestink ...

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Hughes H-1 Racer for Q-40 - 4/11/2003 12:17:25 AM   
PylonWorld



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Status: offline 		DG,

I asked for some info on the NMPRA site, and so far, I've gotten no response about getting an approval at the Bowie race or in advance with a three view.

If I have to have the cowl on, I would do it as a flow-through, since that's what the original is anyway, but I would rather not have to have the cowl.

The noses of most of the the P-51 based planes are nothing like the real planes. The Dago Red, the Vendetta, and especially the Miss Ashley II have the straight and blunt noses, while the Larson and RVB planes just have a straight taper from the spinner to the canopy and to the wing. I kind of had the impression that the nose area was allowed some license to accommodate the "no cowl" rule.

Oh well, maybe this one is dead in the water.

Good thing I have two more conventional designs drawn up.

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golden age racers - 4/11/2003 1:02:07 AM   
js3



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From: Arvada, CO, USA
Status: offline 		Don,

If you really like the retro style planes, I've always thought that the Firecracker or 8 Ball would make a nice Q40. I actually thought about making a plug for the Firecracker but have (so far) resisted the temptation to bog myself down with yet another unfinished project.

I know that TiGuy who ocasionally posts on this forum is working (or had been working) on a Caudron which really looked trick. He posted a couple of pix in the thread where Mluvara documented the construction of his Tsunami.

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Hughes H-1 Racer for Q-40 - 4/11/2003 1:47:01 AM   
PylonWorld



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From: Monroe, NC, USA
Status: offline 		JS,

My primary motive was to find something I can use the Swee' Pea wing on. The Swee' Pea was said to have tricky takeoff habits, and if the new tail doesn't fix that, I would like to try the wing on something else.

The Q-40 Swee' Pea wing is not really shaped like the real wing. It has an almost straight leading edge, and rounded tips, whereas the original was more elliptical.

I saw the H-1 on the magazine cover, and I thought of the wing I had waiting ... in the wings.

Now if those planes you mentioned could use the Swee' Pea wing ...

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Hughes H-1 Racer for Q-40 - 4/11/2003 6:21:28 PM   
kane


 

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From: Arlington Heights, IL, USA
Status: offline 		Don,

Here are some thoughts on using the wing for other airplanes:

The following is a list of airplanes that might be good candidates for a rounded tip wing.

1. Mr. Smoothie (shoulder wing) I like this one because the real airplane had no cheek cowls it used an inline engine. You could model it with the engine upright, and use a small front end.
2. Shoestring (shoulder wing) I believe Jarett used Lyles Napier wing for his original model. This wing is similar to Jerry's Swee Pea wing.
3. Denight Special (low wing)

I also think the "firecracker" or Keith Rider's special had a tapered rounded tip wing. All good choices.

I like the H1 idea. I say get the drawings done and submit them to Rick Moreland.

As far as getting an airplane approved. Make sure you have documentation (3 views and drawings of your proposed model). I know Tom Scott and Rick Moreland (and most likely Pete Reed) will be at Bowie. At a minimum you can distribute the drawings to them there. But give them some time to evaluate them. I also believe you are correct with the comment on creative license for front ends. Perhaps come up with your optimum and a couple of other alternatives for them to choose from.

Dan

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more comments from the peanut gallery - 4/11/2003 8:07:07 PM   
DHG


 

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What Dan said. Mr. Smoothie gets my vote. The world NEEDS a Q40 Mr. Smoothie.

It might even beat a Pole Cat.

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Hughes H-1 Racer for Q-40 - 4/11/2003 11:53:29 PM   
PylonWorld



Posts: 1346
Joined: 12/29/2001
From: Monroe, NC, USA
Status: offline 		Thank guys for the input.

I'll probably go ahead and whip out this plug just to test the technique. The pink foam is so easy to shape, I should be able to do it pretty quick.

Dan, thanks for the airplane suggestions. JS, had mentioned the Firecracker, so it now has 2 votes.

Duane, I'll check out the Mr. Smoothie, since the world NEEDS one.

I need to get the Hirsch books. Is that where I can find these planes?

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Hughes H-1 Racer for Q-40 - 4/12/2003 12:31:22 AM   
PylonWorld



Posts: 1346
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From: Monroe, NC, USA
Status: offline 		I've decided that I'm going to cut down the cowl, and leave it on for the initial plug. I can always cut it down if they will approve the "turbo prop conversion" I did to the plane.

Maybe I can get Jim Wright (the owner/builder of the replica) to send me drawings of his replica with a planned turbo prop conversion.

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Hughes H-1 Racer for Q-40 - 4/12/2003 12:47:32 AM   
js3



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Status: offline 		Don,

In my opinion, the Hirsch books are not that great. Let me rephrase that. They are good because they offer lots of subjects of F1 aircraft but I find the drawings to be sub-par. While the drawings may represent what the real plane looks like, it would be hard to design from them because of inaccuracies.

The Golden Age racers can be found in "The Air Racer" by Mendenhall.

I'm pretty sure both vols of Hirsch are strictly F1.

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Hughes H-1 Racer for Q-40 - 4/12/2003 2:14:21 AM   
kane


 

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Status: offline 		Don,

I agree with John on Hirsch books, They are good for general ideas and shapes. They are strictly F1 airplanes, no Golden Age racers.

Another source I have used is to contact your local chapter of the Flying Aces free flight club. These guys have tons of documentation. There is a Flying Aces, Golden Age mass launch event. So the models are out there. The drawings are fairly accurate and again they will give the general idea.

Dan

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Hughes H-1 Racer for Q-40 - 4/12/2003 8:00:10 AM