RE: Great Planes RV-4 .60-.90 ARF  
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RE: Great Planes RV-4 .60-.90 ARF - 2/12/2008 11:05:21 PM   
twn


 

Posts: 121
Joined: 4/8/2007
From: Revelstoke, BC, CANADA
Status: online 		I was concidering the gp rv-4 60 size. But I wanted to go gas with it. I'm concerned about the short run times with the zenoah g20. Has anybody tried a 26cc. Like the SPE 26. Is this too much? I realize someone is running a da50. What does the g20 & spe 26 compare to as for nitro. I don't want to build a rocket. I just want the convenience of gas... Also I don't want it to get too boring as it might for me with an os 91 4c.

(in reply to ricardinho)
       Post #: 476

RE: Great Planes RV-4 .60-.90 ARF - 2/13/2008 11:20:29 AM   
skorman


 

Posts: 504
Joined: 1/12/2003
From: Virginia Beach, VA, USA
Status: offline 		I had an OS 91 Surpass II in my RV-4 and it flew it scale but it did get boring. The plane at 10 lbs. is too heavy for this engine. I know it's a scale plane but I've discovered I want to have a little more fun with my RV. I've recently replaced the 91 with a brand new OS FS-120S-E Surpass. The engine fits beautifully inside the cowl with no cutting required for the cylinder. With the fit so nice, I don't know why GP doesn't suggest this engine as the maximum for the RV-4. Because of weather, I haven't been able to fly this combination yet but I hope to within the next couple of weeks.

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Steve

(in reply to twn)
       Post #: 477

RE: Great Planes RV-4 .60-.90 ARF - 2/13/2008 12:08:57 PM   
Ken Cz


 

Posts: 65
Joined: 11/1/2006
From: Oxford, MI, USA
Status: offline 		Skorman-
How did the muffler packaging work out with the 1.20? Anything at all different than with the .91?
Been considering the same thing so any other tips on mounting the 1.20 are appreciated.

(in reply to skorman)
       Post #: 478

RE: Great Planes RV-4 .60-.90 ARF - 2/13/2008 12:36:08 PM   
skorman


 

Posts: 504
Joined: 1/12/2003
From: Virginia Beach, VA, USA
Status: offline 		The muffler position is the same as the 91 but the tip of the muffler has no ridge like the 91 to keep an exhaust deflector from sliding off. I considered a Pitts muffler or just letting the exhaust hit the fuse underneath but opted instead to swing the muffler out of the side so it's facing down below the right wing and the wheel pant.

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Steve

(in reply to Ken Cz)
       Post #: 479

RE: Great Planes RV-4 .60-.90 ARF - 2/13/2008 2:37:20 PM   
Whistling Death


 

Posts: 1005
Joined: 3/1/2006
From: Alexander City, AL, USA
Status: online
quote:

ORIGINAL: twn

I was concidering the gp rv-4 60 size. But I wanted to go gas with it. I'm concerned about the short run times with the zenoah g20. Has anybody tried a 26cc. Like the SPE 26. Is this too much? I realize someone is running a da50. What does the g20 & spe 26 compare to as for nitro. I don't want to build a rocket. I just want the convenience of gas... Also I don't want it to get too boring as it might for me with an os 91 4c.

Check this out. http://tech.flygsw.org/rv4review.htm
I am going to do the same. I have had a 91 on mine but I am going to gas. So I am going to put my G-23 on it.
The G-20 would be fine, but you would just need to replace the stock ignition with a CH ignition.

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CORSAIR Brotherhood Lucky #13
AMA# 856000

(in reply to twn)
       Post #: 480

RE: Great Planes RV-4 .60-.90 ARF - 2/17/2008 6:29:21 PM   
skorman


 

Posts: 504
Joined: 1/12/2003
From: Virginia Beach, VA, USA
Status: offline 		I just re-maidened my RV-4 with the OS 120 Surpass and it made a world of difference over the OS 91FS. Lots of vertical and much more aerobatic. I like this plane again.

_____________________________

Steve

(in reply to Whistling Death)
       Post #: 481

RE: Great Planes RV-4 .60-.90 ARF - 2/19/2008 5:58:37 PM   
Birman


 

Posts: 408
Joined: 9/3/2006
From: Racine, WI, USA
Status: offline 		Hi everyone. I've had my RV-4 for about 6 or 7 months now but haven't been able to work on it. Now I'm finally getting back on it.

I'm going to be using a JR X9303 with the R921 receiver. Has anyone used this setup, and if so, can you post some pictures of your radio installation? I'd like to use a tried and proven installation.

Thanks,
Birman

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Club Saito Member #489

(in reply to skorman)
       Post #: 482

RE: Great Planes RV-4 .60-.90 ARF - 2/26/2008 5:08:51 PM   
Daniel-EL



Posts: 130
Joined: 3/2/2005
From: Maumee, OH, USA
Status: offline 		Got my GP RV-4 ARF ordered today from Tower. I'm going to install my Saito 130TD twin which will fit nicely inside the cowl. This engine was last used on my late GP Cub 60 (tangled with a helicopter- no damage to engine) and is well broken in and reliable. Great thread here. It has inspired me.

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I don''t necessarily believe everything I say
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(in reply to Birman)
       Post #: 483

RE: Great Planes RV-4 .60-.90 ARF - 2/26/2008 5:13:56 PM   
teamscalepilot


 

Posts: 448
Joined: 8/26/2002
From: Ridgeland, SC, USA
Status: offline 		Here is my RV-4 OS .91 2c Futaba 14 Mz 2.4 Fasst 111.25 lbs..

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(in reply to Daniel-EL)
       Post #: 484

RE: Great Planes RV-4 .60-.90 ARF - 2/26/2008 5:16:54 PM   
teamscalepilot


 

Posts: 448
Joined: 8/26/2002
From: Ridgeland, SC, USA
Status: offline 		OPPS it's a 100 lbs lighter!!!!

(in reply to teamscalepilot)
       Post #: 485

RE: Great Planes RV-4 .60-.90 ARF - 2/26/2008 7:54:02 PM   
Daniel-EL



Posts: 130
Joined: 3/2/2005
From: Maumee, OH, USA
Status: offline 		...and what a delightful airplane it is, sir! I saw it on the kitbash thread as well. If I wreck mine (God forbid!), I will rebuild using your techniques and scale it after a real example. I must say, however, that I gave up crashing a few years ago. I found it to be too expensive and time-consuming.

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I don''t necessarily believe everything I say
...Marshall McLuhan...

(in reply to teamscalepilot)
       Post #: 486

RE: Great Planes RV-4 .60-.90 ARF - 2/28/2008 3:57:42 AM   
chopper man


 

Posts: 414
Joined: 2/12/2004
From: Pooler, GA, USA
Status: offline 		I am working on mine. I'm installing the flap servos. On the right wing panel is part of the servo going to hang off of the panel or should I flip it around so that it doesn't. If I do than the opening will be closer to the flap than the panel on the left wing. Manual doesn't do a very go job of explaining that part. I do understand that the servo arm on the right wing points to the wing tip and the left points to the wing root. Thanks for your help.

chopper man

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"Boy I wish I hadn't done that!!"

(in reply to Daniel-EL)
       Post #: 487

RE: Great Planes RV-4 .60-.90 ARF - 2/28/2008 12:48:44 PM   
skorman


 

Posts: 504
Joined: 1/12/2003
From: Virginia Beach, VA, USA
Status: offline
quote:

ORIGINAL: chopper man

I am working on mine. I'm installing the flap servos. On the right wing panel is part of the servo going to hang off of the panel or should I flip it around so that it doesn't. If I do than the opening will be closer to the flap than the panel on the left wing. Manual doesn't do a very go job of explaining that part. I do understand that the servo arm on the right wing points to the wing tip and the left points to the wing root. Thanks for your help.

chopper man


The flap servos are not symmetrical on purpose so you can use a standard Y connector and not a reversing one. You can also opt to plug each flap into its own channel. Great Planes did this to make it easier for people not plugging the flaps into seperate channels.

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Steve

(in reply to chopper man)
       Post #: 488

RE: Great Planes RV-4 .60-.90 ARF - 2/28/2008 9:59:47 PM   
Daniel-EL



Posts: 130
Joined: 3/2/2005
From: Maumee, OH, USA
Status: offline 		Use one of these: http://www.keleo-creations.com/Twins/100thumb2.htm

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I don''t necessarily believe everything I say
...Marshall McLuhan...

(in reply to edberg)
       Post #: 489

RE: Great Planes RV-4 .60-.90 ARF - 3/4/2008 6:47:26 PM   
Daniel-EL



Posts: 130
Joined: 3/2/2005
From: Maumee, OH, USA
Status: offline 		Well, today I officially gave up on my idea to install the Saito 130TD. Mostly it was an exhaust problem - couldn't get one routed to the right spot and the headers I had (stock and keleo) would not allow the engine to fit inside the cowl properly. So, heck with it. I ordered the OS FS91. Looks like an easy installation and Mr. Pettit says its plenty of power for this bird. I'll save the Saito for another day.

BTW, my RV-4 ARF has arrived in top shape and.....wow, it's purdy!

_____________________________

I don''t necessarily believe everything I say
...Marshall McLuhan...

(in reply to Daniel-EL)