RE: Hi Perf Russian 10cc at a bargain price!  
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RE: Hi Perf Russian 10cc at a bargain price! - 3/17/2008 4:26:41 AM   
longdan



Posts: 495
Joined: 10/18/2006
From: Auckland, NEW ZEALAND
Status: offline
quote:

the latest shipment of AT40s from TopRC are not *real* AT40s. They've got a flimsy light-ply fuselage with big cut-outs


That's a shame - I was thinking of getting another one and hot-rodding it and really giving it a thrashing.

blw - The World models Skyraider comes in 2 versions - Mach I (high wing) and Mach II (low wing). The low wing version is the one used for Club 40 pylon racing.

The AT 40 is a very cheap basic trainer designed for .40 engines. It is well made (for a chinese ARF) and can take a lot of abuse. The construction is (was) a bit more solid than the Mach II skyraider. I haven't seen it advertised through American hobby shops. I'm not sure who makes it. But from what X-Jet is saying, it sounds like it's not the same as it used to be.






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(in reply to XJet)
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RE: Hi Perf Russian 10cc at a bargain price! - 3/17/2008 4:31:36 AM   
XJet


 

Posts: 3450
Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
Status: offline 		The Skyraider Mach 2 is an excellent model for 46-55 sized motors but I don't know that it would hold up to a powerful 61. It too is pretty light balsa/ply construction but they really honk with a fast 46 in them.

The AT40 trainer however, is an iconic "old school" ARF that uses solid balsa with ply doublers for the fuselage and that makes them incredibly strong. I've never seen an AT40 wing fold up either. It's just a shame that the Chinese saw an opportunity to cut costs by replacing the balsa with thin ply filled with lightening holes in the new version.

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RE: Hi Perf Russian 10cc at a bargain price! - 3/17/2008 3:24:57 PM   
blw



Posts: 4562
Joined: 3/15/2004
From: Auburn, AL, USA
Status: offline 		Thanks for the info. Interesting.

XJet- A lot of decisions on ARFs make no sense at all.

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RE: Hi Perf Russian 10cc at a bargain price! - 3/17/2008 4:20:39 PM   
BlackB12


 

Posts: 379
Joined: 9/22/2004
From: lancaster, PA, USA
Status: offline 		I'll be testing my engine on a Sky Raider Mach 2. The fuse on these planes is all ply and it very durable. I've had mine in a full speed dive powered by a Supertigre 51 and it held. We'll see how it handles this 61. Should be fine though as someone in the Pylon forums put a Jett60 on theirs with no problem.

Mike

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       Post #: 229

RE: Hi Perf Russian 10cc at a bargain price! - 3/17/2008 8:54:04 PM   
XJet


 

Posts: 3450
Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
Status: offline 		The only problem you might have is with the CG. A .61 weighs a bit more than a .51 so you may have to get creative with your battery placement to keep the CG within reasonable limits.

On my AT40 the battery is behind the wing in order to get the CG right.

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RE: Hi Perf Russian 10cc at a bargain price! - 3/18/2008 1:52:40 AM   
blw



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Joined: 3/15/2004
From: Auburn, AL, USA
Status: offline 		Mike,

Let us know how it flies with the .61

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RE: Hi Perf Russian 10cc at a bargain price! - 3/18/2008 6:30:28 PM   
BlackB12


 

Posts: 379
Joined: 9/22/2004
From: lancaster, PA, USA
Status: offline 		I'll post my results. It will be a week or more though until I have time to mount it and pipe it. Need to find a tube to go between the pipe and the manifold. also need to find some 5% fuel, or do you think 10% will work with more head shims?

Mike

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       Post #: 232

RE: Hi Perf Russian 10cc at a bargain price! - 3/18/2008 6:50:54 PM   
DarZeelon



Posts: 7079
Joined: 4/9/2003
From: Rosh-Ha'Ayin, ISRAEL
Status: online 		Mike,


From the clip (XJet) Bruce posted, this engine seems to run so nicely on 0-5%...

Why bother and change the setup, to force it to run more nitro?


Sometimes more is actually less...


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RE: Hi Perf Russian 10cc at a bargain price! - 3/18/2008 7:59:28 PM   
BlackB12


 

Posts: 379
Joined: 9/22/2004
From: lancaster, PA, USA
Status: offline 		Yeah sounds good. I'll pick up a gallon of 5%.

Mike

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       Post #: 234

RE: Hi Perf Russian 10cc at a bargain price! - 3/18/2008 8:42:20 PM   
DarZeelon



Posts: 7079
Joined: 4/9/2003
From: Rosh-Ha'Ayin, ISRAEL
Status: online
quote:

ORIGINAL: BlackB12

Yeah sounds good. I'll pick up a gallon of 5%.



Mike,


This engine is ABC, so make sure that gallon has a good measure of castor oil.

Sig Champion and PowerMaster GMA are good. Or you can get Brian Cooper's +C.


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RE: Hi Perf Russian 10cc at a bargain price! - 3/18/2008 11:28:02 PM   
Ken6PPC


 

Posts: 653
Joined: 6/20/2006
From: Hamilton, OH, USA
Status: offline 		XJet, I'm anxiously awaiting the unveiling of your new web site! http://www.rcmodelreviews.com/

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RE: Hi Perf Russian 10cc at a bargain price! - 3/19/2008 12:53:08 AM   
XJet


 

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Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
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quote:

ORIGINAL: Ken6PPC

XJet, I'm anxiously awaiting the unveiling of your new web site! http://www.rcmodelreviews.com/


It'll be up tomorrow (in about 24hrs time) at *LONG* last.

I've been juggling too many balls of late but have spent the last couple of days working on the site with a lot more stuff to add over the next few weeks.


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(in reply to Ken6PPC)
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RE: Hi Perf Russian 10cc at a bargain price! - 3/20/2008 7:05:30 PM   
BlackB12


 

Posts: 379
Joined: 9/22/2004
From: lancaster, PA, USA
Status: offline 		Can anyone offer some more advice on freeing up the carb barrel? I've buffed it lightly yet when the spring in in behind the barrel and the throttle stop screw is in just enough to hold the barrel it really binds. I tried to buff inside the carb body but I can only get in there halfway before hitting the spraybar.

Mike

(in reply to XJet)
       Post #: 238

RE: Hi Perf Russian 10cc at a bargain price! - 3/20/2008 9:11:38 PM   
XJet


 

Posts: 3450
Joined: 3/31/2003
From: Tokoroa, NEW ZEALAND
Status: offline 		I replaced the spring in my carby with a lighter one - the original was way too strong.

The other thing is to check that the two tubes which comprise the spray bar/metering setup aren't binding. They were slightly out of alignment in mine and that meant the barrel would bind at certain angles even without the spring or barrel-retaining screw in place.

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RE: Hi Perf Russian 10cc at a bargain price! - 3/20/2008 10:49:18 PM   
BlackB12


 

Posts: 379
Joined: 9/22/2004
From: lancaster, PA, USA
Status: offline 		OK, I'll double check that but I'm pretty sure it's just the spring as without it the barrel moves smoothly.

Mike

(in reply to XJet)
       Post #: 240

RE: Hi Perf Russian 10cc at a bargain price! - 3/21/2008 11:02:09 PM