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All Forums >> RC Airplanes >> Twin & Multi Engine RC Aircraft >> RE: Four engine model
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RE: Four engine model - 8/5/2006 4:48:30 AM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		BillS
Saw your idea on the four engine Pheonix.
Check the picture attached. Something like that??? The plane weighs 6.5 pounds empty,,four .32's?? or LA 40's??
The nacelles can be moved in and glued closer, but the original screws for mounting will not have much to grab...Uh..If you cut into the wing..under the nacelle mount, where could not be seen, you could install blind nuts inside the wing, bolt and glue then!! Mmmm
Twinman
PS,,no, at this time building as twin, but...

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(in reply to BillS)
       Post #: 51

RE: Four engine model - 8/6/2006 12:32:59 AM   
BillS


 

Posts: 3048
Joined: 9/6/2004
From: Greensboro, NC, USA
Status: offline 		Wow! That looks exciting.

Bill

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       Post #: 52

RE: Four engine model - 8/6/2006 3:28:21 AM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		BillS,
I am humbled in your presence,BUT IT WAS YOUR IDEA!!! I am innocent!!
Twinman
Now where did I put Neils email??..Rats, have already glued the nacelles in the proper place, you would need to move inward and a little sanding, not much to get a good fit on the wing.

(in reply to BillS)
       Post #: 53

RE: Four engine model - 8/8/2006 2:45:44 PM   
BillS


 

Posts: 3048
Joined: 9/6/2004
From: Greensboro, NC, USA
Status: offline
quote:

I am innocent!!

Well … that’s questionable.

quote:

plane weighs 6.5 pounds empty

If it doesn’t struggle to get off the ground I probably won’t know how to fly it. Maybe a brick can be found.

Bill

(in reply to twinman)
       Post #: 54

RE: Four engine model - 8/8/2006 7:19:45 PM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		One brick coming up..might be a good way to practice warbirds..Getting closer on the build, but no time to post process. Like always will wait till last minute then hours catching up with build story.
Twinman

(in reply to BillS)
       Post #: 55

RE: Four engine model - 8/10/2006 6:02:06 PM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		BillS
You happy now!!???..no, I borrowed the extra nacelles to mess with you. Tee Hee
No, it will fly as a twin!!
Twinman.

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       Post #: 56

RE: Four engine model - 8/10/2006 9:47:57 PM   
BillS


 

Posts: 3048
Joined: 9/6/2004
From: Greensboro, NC, USA
Status: offline 		Thanks for the intriguing picture, which looks good. The twin disease is bad and unrelenting. But you already know that.

13” props? Must be using too much engine again. Assume the engines will be mounted at 9 o’clock.

With some thought about the inboard nacelle location the airplane could be a twin with option for bolt on nacelles for two more engines. As more experience is gained … ho, ho, ho.

Lets see … A .60 twin should come in at about 10# and 4 .40’s at a little over 12#.

The prop to fuselage clearance appears that it will be large. What is the center distance on the engines?

Bill

(in reply to twinman)
       Post #: 57

RE: Four engine model - 8/11/2006 3:33:06 AM   
nchrome


 

Posts: 701
Joined: 3/27/2002
From: Galesburg, IL, USA
Status: offline 		Twinman is that a P-61 Blackwidow in the background. How soon will it be flying?

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       Post #: 58

RE: Four engine model - 8/11/2006 4:43:20 AM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		BillS,
The CURRENT and stock center to the fuse is now 10.5". My two cents is IF and I say IF someone were to do this. Move and glue the inboard nacelles center around 6.5", which would allow up to 12" props safely and then move the outer nacelles to a similar centerline to the inboard. My two cents, based upon the Cedar B-17..You would NOT need 40's unless something like LA's. Good .25's to .35's would work and be lighter. The prototype Ceder B-17 has magnum .32's, with inefficient three blade props and will go straight up..and that was before the new fifth engine.
Neil WILL pick up these nacelles again, but YOU asked for it!!
Tee Hee.
Disclaimer...( Too many Lawyers!!!) Cedar, to my knowledge has not tested anything like this, no have I ........Ok..Ok,,maybe someday!!
Good Luck,
Twinman
PS To nchrome on the P-61..Geeze..you guys don't miss much!!! That plane is over two years old,,can't or won't leave in the Garage in Houston in the summer. To date, around 20 flights and three engine outs..not a big deal..other than what happens to my heart rate!!!
(Mental Note)..be more careful of back ground..you would not like to have seen the picture of my bare feet in one post up at the Phoenix build that I spotted before posting...now there is a MENTAL IMAGE!!!

(in reply to BillS)
       Post #: 59

RE: Four engine model - 8/23/2006 9:23:11 PM   
BillS


 

Posts: 3048
Joined: 9/6/2004
From: Greensboro, NC, USA
Status: offline 		The picture is the beginning of my 4-engine project. The nacelles will consist of two parts, a wing mount and a tank and engine module. The picture shows a wing mount.

I finally solved the long idle problem. It was a tuning and glow plug issue and the sweet spot wasn’t being found. The engines will idle for ten minutes now.

Bill


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       Post #: 60

RE: Four engine model - 8/23/2006 10:17:38 PM   
KidEpoxy



Posts: 3387
Joined: 10/14/2004
From: San Antonio, TX, USA
Status: online
quote:

from twinman:
The CURRENT and stock center to the fuse is now 10.5". My two cents is IF and I say IF someone were to do this. Move and glue the inboard nacelles center around 6.5", which would allow up to 12" props safely and

That 12in clearance sounds like 4strokes in mind, but is that much disk really needed for that red zipper? Couldnt someone go the speed route with twostrokes and hi pitch short props for narrower spacing?

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Optional MA is part of AMA history, we can go optional AGAIN if we just say so

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       Post #: 61

RE: Four engine model - 8/23/2006 10:35:02 PM   
BillS


 

Posts: 3048
Joined: 9/6/2004
From: Greensboro, NC, USA
Status: offline 		Good point. 10.5” clear would allow for 20” props. My o my what a big engine.

Bill

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       Post #: 62

RE: Four engine model - 8/24/2006 6:28:45 AM   
Wayne22



Posts: 4336
Joined: 4/10/2002
From: Edmonton, AB, CANADA
Status: offline 		I'm working my way up the multi ladder...one engine at a time!!

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All I ask is for a chance to prove that money can't make me happy......

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       Post #: 63

RE: Four engine model - 8/24/2006 2:30:46 PM   
awood12345



Posts: 272
Joined: 11/23/2002
From: kent, UNITED KINGDOM
Status: offline 		If you are interested in four engine aircraft read this article my dad wrote. It includes our flying routine and our set up precedures.

http://www.corsairmfc.co.uk/taming_the_big_lanc.htm

Hope this helps,
Alan

(P.S. We have loads of articles on our webpage check out the articles section some others might be useful.)

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       Post #: 64

RE: Four engine model - 8/24/2006 3:04:47 PM   
BillS


 

Posts: 3048
Joined: 9/6/2004
From: Greensboro, NC, USA
Status: offline
quote:

ORIGINAL: nony

I'm working my way up the multi ladder...one engine at a time!!

Very nice.

I like three engine models but almost no one builds them. They are much easier to fly and engine out is almost a non-event.

Bill

(in reply to Wayne22)
       Post #: 65

RE: Four engine model - 12/5/2006 11:02:51 AM