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All Forums >> RC Airplanes >> Scratch Building, Aircraft Design, 3D/CAD >> Where can I get a CAD designed engine? Page: [1]

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Where can I get a CAD designed engine? - 3/24/2002 12:28:41 PM   
Someone11-RCU



Posts: 394
Joined: 2/3/2002
From: Fresno, CA, USA
Status: offline 		Is there any place that I can get a CAD drawing of a .40 sized engine, so I can stick it into my current CAD project? It doesn't have to be a 40 sized engine, becuase I can change its scale. I just need an airplane engine drawing that I can copy/paste into my CAD drawing.

Thanks-Brian

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Thanks for the forums!
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Here you go.. - 3/24/2002 2:39:41 PM   
Mike James



Posts: 2464
Joined: 1/19/2002
From: Anchorage, AK, USA
Status: offline 		Here's one I designed for exactly that purpose. When I first built it, I sized it to dimensionally match an OS .40, but you can re-scale it to resemble most 2-strokes. Email me and I'll send you a DXF file. (or .3DS or .OBJ)

Also, see the thread I started some time back here, called "CAD Model Engines". (a few pages back now)

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Mike James
RC Design and Building - www.nextcraft.com

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RC bits in DWG & DXF - 3/24/2002 4:48:09 PM   
Merlin65



Posts: 216
Joined: 2/17/2002
From: MelbourneVictoria, AUSTRALIA
Status: offline 		I have a zip containing engines of all sizes, gas, glow, electric as well as fuel tanks, servos, receivers, control horns, mufflers, retracts etc.

About 800k if anyone's interested I'll post it to a web site. Both DWG & DXF in the zip.

I also have a full scale drawing of a MK IX Spitfire with all wing, fuz sections etc.

Let me know if there's any interest.

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       Post #: 3

DXF & DWG Files - 3/24/2002 8:03:07 PM   
pilot!


 

Posts: 11
Joined: 2/24/2002
From: Quitman, GA, USA
Status: offline 		By all means, Merlin! I know that _I_ would like to have access to both the engines file AND the Spit drawings. If you'll put those up and give us an address, I'd like to go git 'em! I also note that you can attach a file to your posts here, up to 70K in size, if that's any easier.

Thanks!


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Seeya!

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Merlin65 - 3/25/2002 2:51:15 AM   
Merlin65



Posts: 216
Joined: 2/17/2002
From: MelbourneVictoria, AUSTRALIA
Status: offline 		There's more interest than I expected.
These zips are both too large for attachment to this post so I have uploaded the files to [url]www.apmagic.com/rcbits/[/url]

I am not the creator of these files having found them in my wanderings around the web, so full credit to the creators who made them available originally.


Merlin65

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       Post #: 5

Thanks! - 3/26/2002 6:45:51 AM   
pilot!


 

Posts: 11
Joined: 2/24/2002
From: Quitman, GA, USA
Status: offline 		Thanks Merlin...and speaking of "credit where due", I've just _got_ to mention this...as I type, I'm sitting here, listening to all sorts of big loud radial a/c engines. Full-size ones. I just got a CD recording from an outfit in California (where else? ) of "Round Sounds". I can now _highly_ recommend that if you're into classic recip engines, you gotta take a look (listen?) at their website- http://www.aircraftrecords.com

They've got quite a few now, and more on the way. (I'm gonna be listening to a Bf-109G recording next...and for under twenty bucks a pop, it's great fun.)

I know, I know...off-topic, and I'm sorry, but I just can't resist!

Thanks again for the files!


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Seeya!

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Merlin65 - 3/26/2002 7:32:49 AM   
Merlin65



Posts: 216
Joined: 2/17/2002
From: MelbourneVictoria, AUSTRALIA
Status: offline 		Staying just a little off topic...
As good as the radials are, now watch and listen as the MK XIV Spitfire and the mighty Rolls Royce Griffon get to it. This'll give you goosebumps!
[url]www.apmagic.com/spit14/spit_xiv_display.rm[/url]
--
Merlin

P.S. I'm sure the moderator will tolerate this O/T post 'cos he's a Spitfire addict!

< Message edited by Merlin65 -- Mar 26 2002 2:44AM >

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Where can I get a CAD designed engine? - 4/3/2002 8:26:46 PM   
bentwings


 

Posts: 278
Joined: 12/22/2001
From: St.Paul, MN, USA
Status: offline 		Oh boy are you askin' to stir the pot here!!!
Gimme the spoon.

Standing next to an F-8-F Bearcat warming up, you don't even need ears to enjoy the sound. Best not to have recently eaten as it is gut wrenchin'....And a low pass over the field.....unreal.

Truth be known, there are only 2 motors that ever should be allowed to run without very quiet mufflers......radial aircraft motors with 18 or more cylinders and Top Fuel Funncars. The Top Fuel motors even smell good!! Nothin' like burnt nitro.

This stew is really startin' to cook. Anybody else want to stir for a while???

BTW the CD is great.

bentwings

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bentwings

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Where can I get a CAD designed engine? - 4/4/2002 2:51:06 AM   
Ed Smith


 

Posts: 2851
Joined: 12/29/2001
From: Brantford, ON, CANADA
Status: offline 		Somebody mentioned Radial engines. So, can any body tell me why WW2 and after radials always had an odd number of cylinders? And no referencing double banked engines.

Ed S

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       Post #: 9

Im looking for Spitfire Dwg o DXF plans - 10/12/2002 9:56:15 AM   
druid



Posts: 27
Joined: 10/6/2002
From: FlorianópolisSanta Catarina, BRAZIL
Status: offline 		Dear friends,

I find on internet one plan of spitfire to engine .40 or .46

Please help meeeeeeeeee!!!!!!!!!

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Where can I get a CAD designed engine? - 10/14/2002 9:09:08 AM   
messacar


 

Posts: 32
Joined: 4/8/2002
From: Brampton, ON, CANADA
Status: offline 		A friend of mine, an aeronautical engineer, explained the odd number of cylinders has to do with the firing order.

On a seven cylinder engine the order is 1,3,5,7,2,4,6,1,3,5....

Fred

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Where can I get a CAD designed engine? - 10/14/2002 5:17:17 PM   
Ed Smith


 

Posts: 2851
Joined: 12/29/2001
From: Brantford, ON, CANADA
Status: offline 		That would be the firing order. But the real reason they always have an odd number of cylinders is because they are four stroke engines. Now there is something to think about.

Ed S

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       Post #: 12

Where can I get a CAD designed engine? - 10/14/2002 6:49:31 PM   
Merlin65



Posts: 216
Joined: 2/17/2002
From: MelbourneVictoria, AUSTRALIA
Status: offline 		Any four stroke engine, regardless of construction, must fire all of the cylinders in two revolutions of the crankshaft.

Unlike an automobile engine, a radial engine has only one crankshaft throw for all the cylinders in a bank.

Remember that an 18 cylinder engine is just two 9 cylinder banks set 180 degrees opposite to each other.

The firing order starts with the #1 cylinder at the top and proceeds around the engine in a counter clockwise direction, as viewed from the front. The firing order progresses from the #1 cylinder, skips #2 cylinder and fires #3 cylinder.

So in the first revolution of the crank, the firing order would be # 1, #3, #5, #7, and #9.

Using this skip and fire technique, the next cylinder to skip on the second revolution of the crankshaft would be the #1 cylinder.

On the second revolution of the crank, the firing order would be #2, #4. #6, #8.

Again using the skip and fire technique, the #9 cylinder is skipped and the #1 cylinder is again ready to start the whole process over again.

From "Ageless Engines"
--
Merlin

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Where can I get a CAD designed engine? - 10/15/2002 1:17:06 AM   
EricJ


 

Posts: 53
Joined: 2/5/2002
From: River Edge, NJ,
Status: offline 		There is one main con rod with the articulating rods connected to either sides of the conrod. You need to have the same number of articulating rods on both sides of the Con rod. So for 5 cyl, you would have 1 con rod, 2 articulating rods on the left, 2 on the right. For 7 you would have 1, 3 & 3. 9 is 1, 4 & 4.

This causes a timing problem since the articulating rods are following an elliptical pattern and the conrod is following a circle.

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       Post #: 14

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