which f3a for a 75 2st on pipe  
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All Forums >> RC Airplanes >> Pattern Flying >> which f3a for a 75 2st on pipe
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which f3a for a 75 2st on pipe - 5/24/2008 1:36:29 AM   
Gregor32


 

Posts: 232
Joined: 5/25/2004
From: Melbourne, AUSTRALIA
Status: offline 		i guess the heading says it all, but I'm looking for something that will fly accurately and fast, i was thinking a cm pro lark or something in that size would be good (59" ws), but these are not avaliable in this part of the world any more. there seems to be a lot of 50 size aircraft and then 90 size but no 60 size any more. does any one know of a large 50 size pattern plane? thanks Greg.
       Post #: 1

RE: which f3a for a 75 2st on pipe - 6/1/2008 1:46:00 PM   
Jeff Boyd 2



Posts: 356
Joined: 3/18/2005
From: Adelaide, AUSTRALIA
Status: offline 		I take it that's the OS75AX ??

You could try one of these http://www.rcwarehouse.com.au/productinfo/?prod_id=SPAEXCEL50 . . with throttle management

It would be a little over powered, but it's difficult to get something to nicely suit the OS 75. Most nice, smaller planes seem to be for 50 or 90 size.

(in reply to Gregor32)
       Post #: 2

RE: which f3a for a 75 2st on pipe - 6/1/2008 11:54:10 PM   
anuthabubba


 

Posts: 174
Joined: 11/9/2007
From: Transylvania, LA, USA
Status: offline
Fliton Inspire 60? 6 pounds, 700 square inches

Even an Inspire 90 only weighs (according to their site) 7 pounds. How much overpowered does a plane need to be these days?

Terry in LP

(in reply to Gregor32)
       Post #: 3

RE: which f3a for a 75 2st on pipe - 6/2/2008 3:40:21 AM   
Gringo Flyer



Posts: 2226
Joined: 1/16/2004
From: Formosa, ARGENTINA
Status: offline 		I agree, there's not a huge power difference between a 75 and 90. I think it will work well on a 90 sized frame.


_____________________________

"Courage is being scared to death...and saddling up anyway."---John Wayne

(in reply to anuthabubba)
       Post #: 4

RE: which f3a for a 75 2st on pipe - 6/2/2008 10:29:56 AM   
Jeff Boyd 2



Posts: 356
Joined: 3/18/2005
From: Adelaide, AUSTRALIA
Status: offline 		I put 120's in 90 size planes

JB

(in reply to Gringo Flyer)
       Post #: 5

RE: which f3a for a 75 2st on pipe - 6/2/2008 2:49:59 PM   
anuthabubba


 

Posts: 174
Joined: 11/9/2007
From: Transylvania, LA, USA
Status: offline
Is that the current definition (~750 sq/inches x ~8 pounds) of a 90 size plane (which by the way used to be considered a 60 size plane) or the traditional (900+ sq/inches x 9+ pounds) definition?

Terry in LP

(in reply to Jeff Boyd 2)
       Post #: 6

RE: which f3a for a 75 2st on pipe - 6/2/2008 4:14:58 PM   
martinoto


 

Posts: 193
Joined: 5/13/2003
From: Buenos Aires, ARGENTINA
Status: offline 		Few years ago I saw CAMODEL's Widebody 60 and Epsilon 90 flying well with .60 2s in their nose. Then, 91FX was the "de facto" standard for the Epsilon, and I have seen several of them.
Now, it looks that the trend is to put 120AX on the same plane that tracks well on .61's.
It is obvious that there is a tendency to over-power everything, no matter if you want to hoover the plane or not, (which seems to me it was the primary reason to overpower).
There is an Epsilon 90 at my field that originally flew with an ST 90, and it did fine. Now it has a 120AX, and the owner and other pilots who flew the plane reported that it flies much better, although before you could also hang it from the nose with the ST...

I don't get it...

And then again, we all complain about the fuel cost...

Back to the thread, most of the pattern planes available today came in the 46 or the 90 versions, and a 75 is a lot too much for a 46 plane (if there is a "too much engine" definition in your book). Not a modern plane in any sense, but if I have to choose, I would get myself an EU1-A for the 75AX. That should be a perfect match.

My 2cts.

Regards

_____________________________

"Give me balsa and a cutter, and I will cut a little too much"

(in reply to anuthabubba)
       Post #: 7

RE: which f3a for a 75 2st on pipe - 6/2/2008 11:02:32 PM   
Jeff Boyd 2



Posts: 356
Joined: 3/18/2005
From: Adelaide, AUSTRALIA
Status: offline 		Actually . . the CA Model post reminds me . . the HobbyMan at Dandenong had some Zafiro's in stock. I think this would be awesome with a 75 in it ! !

Winspan: 1600 mm.
Fuse: 1650 mm.
Weight: 3.200 / 3600 grs.
Glow Engine: .60 / .90 2T o .90 / 1.10 4T


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(in reply to martinoto)
       Post #: 8

RE: which f3a for a 75 2st on pipe - 6/3/2008 5:17:59 PM   
Gringo Flyer



Posts: 2226
Joined: 1/16/2004
From: Formosa, ARGENTINA
Status: offline
quote:

ORIGINAL: martinoto

Few years ago I saw CAMODEL's Widebody 60 and Epsilon 90 flying well with .60 2s in their nose. Then, 91FX was the "de facto" standard for the Epsilon, and I have seen several of them.
Now, it looks that the trend is to put 120AX on the same plane that tracks well on .61's.
It is obvious that there is a tendency to over-power everything, no matter if you want to hoover the plane or not, (which seems to me it was the primary reason to overpower).
There is an Epsilon 90 at my field that originally flew with an ST 90, and it did fine. Now it has a 120AX, and the owner and other pilots who flew the plane reported that it flies much better, although before you could also hang it from the nose with the ST...

I don't get it...

And then again, we all complain about the fuel cost...

Back to the thread, most of the pattern planes available today came in the 46 or the 90 versions, and a 75 is a lot too much for a 46 plane (if there is a "too much engine" definition in your book). Not a modern plane in any sense, but if I have to choose, I would get myself an EU1-A for the 75AX. That should be a perfect match.

My 2cts.

Regards


I have an Epsilon with a ST90 and it flies great. Its not a 3D monster but I didnt set it up to be one. It has unlimited vertical and can maintain speed in big loops. I think its plenty of power for the model.



_____________________________

"Courage is being scared to death...and saddling up anyway."---John Wayne

(in reply to martinoto)
       Post #: 9

RE: which f3a for a 75 2st on pipe - 6/5/2008 6:33:14 AM   
Gregor32


 

Posts: 232
Joined: 5/25/2004
From: Melbourne, AUSTRALIA
Status: offline 		thanks for the input guys, i guess i could put my 75 in a light 90 size plane, but im looking to go fast, not fly marginally. i have a fx91 that i could use in a 90 size plane but that is not what i wanted to achieve. and im not wanting to put it in a 50 size plane and have a difficult handling plane. regards and thanks for the input

(in reply to Gringo Flyer)
       Post #: 10

RE: which f3a for a 75 2st on pipe - 6/5/2008 4:12:22 PM   
jeffk464


 

Posts: 1241
Joined: 10/31/2004
From: cerritos, CA, USA
Status: offline 		If you want fast and precise, you might want to look at classic pattern planes from the 70'a and 80's. They were designed around older 60 sized engines and have very low drag fuselages. My understanding is that modern pattern planes have "fat" fuselages so the plane will not accelerate excessively when on the downlines. A modern 75 on these classic sleek designs should really move. Heck, these planes look like they are going fast sitting on the ground.

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< Message edited by jeffk464 -- 6/5/2008 4:21:25 PM >

(in reply to Gregor32)
       Post #: 11

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