GP Pitts ARF With OS 300 Super Gemini Twin    Gallery
View related threads: (in this forum | in all forums)

Logged in as Guest



Users viewing this topic: none
    Search This Thread  
 
Printable Version

All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> GP Pitts ARF With OS 300 Super Gemini Twin
Page: [1]

Tower Hobbies Get Coupon Codes Brands  
Login
Message << Older Topic   Newer Topic >>
GP Pitts ARF With OS 300 Super Gemini Twin - 8/4/2003 7:49 PM   
RCJake-rcu


 

Posts: 0
Score: 100
Joined: 4/11/2003
Last Login: 4/28/2006
From: Corvallis, OR, USA
Status: offline 		Hi All,

I just finished building a Great Planes 1/3 scale ARF with an
OS 300 Super Gemini Twin for a friend. This engine is recommended by Great Planes for this aircraft, but there are no instructions as to how to install it, etc. A call to Great Planes for info was of no help. They would not even tell us how it flew, etc.
A message was sent to OS looking for an available muffler for the engine...none available.
So, of to work I went and modified the firwall to accept the engine, mounted the throttle servo to the firewall, installed the 7 digital servos for the control surfaces, matchbox for the 4 aileron servos, , battery backup system, onboard glow driver and a special decal set for the Pitts. Now I needed a muffler.
I contacted Slimline here in the Phoenix area and took the Pitts to them. They had made a Pitts muffler in the past for the OS 300 twin, but didn't know if it would work with the Great Planes Pitts. After some measurements and leaving the fuse with them for a couple of days, they modified their original design to fit the fuse.
When I started the engine with the Slimline Pitts muffler, you could not believe the sound! It was great!!! The exhuast stacks come out of the cowl at the scale location and it purrs at idle. At higher power settings, it sounds very scale like. Also, it is a very smooth running engine.
One of the things that we did not want to do with this airplane was to cut up the cowl for the engine. With the OS 300 twin, all of the engine fits inside of the cowl and the only holes that were put in it were the holes that were drilled for the mounting screws.
The Pitts was test flown on7/27 and flew like a dream. At 1/2 throttle, it will do anything that the full size will do and it sounds great.
If anyone would like photos or info on how to build a Great Planes pitts with the OS 300 Super Gemini twin, just drop me a line

Attachments
Click to see fullsize image.
Click for fullsize


Hide Signatures
       Post #: 1

GP Pitts ARF With OS 300 Super Gemini Twin - 8/4/2003 7:52 PM   
RCJake-rcu


 

Posts: 0
Score: 100
Joined: 4/11/2003
Last Login: 4/28/2006
From: Corvallis, OR, USA
Status: offline 		Here is another photo showing the front of the cowl with the OS 300 Gemini twin installed...

Attachments
Click to see fullsize image.
Click for fullsize


Hide Signatures

(in reply to RCJake-rcu)
       Post #: 2

GP Pitts ARF With OS 300 Super Gemini Twin - 8/6/2003 7:24 AM   
rfw1953



Posts: 1346
Score: 100
Joined: 7/9/2002
Last Login: 8/25/2007
From: Hampton Cove, AL, USA
Status: offline 		Very nice work. Congratulations! I am on my second model after a stupid error that cost me my first Pitts and most likely the engine. Still waiting on the engine verdict, but not sounding good. I liked the airplane so much that I purchased another kit that I will assemble this fall. Just had to have another one. It sure is a crowd pleaser. Have fun!


_____________________________

Good Luck and Good Flying,
Roger

Hide Signatures

(in reply to RCJake-rcu)
       Post #: 3

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 10/14/2003 4:37 AM   
Bodiddley62


 

Posts: 1
Score: 100
Joined: 9/5/2003
Last Login: 7/17/2010
From: Warner Robins, GA, USA
Status: offline 		I am also building the GP Pitts with the OS 300. I'm still making final decisions on some parts of the equipment. Any advice would be greatly appreciated. I was considering S9001 servos on a 6 volt dual battery system, to provide additional torque. Also, did Slimline keep any record of the alterations on the muffler for this application. I will need a muffler, for smoke system. Thanks

Hide Signatures

(in reply to RCJake-rcu)
       Post #: 4

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 10/14/2003 6:30 AM   
RCJake-rcu


 

Posts: 0
Score: 100
Joined: 4/11/2003
Last Login: 4/28/2006
From: Corvallis, OR, USA
Status: offline 		Bodiddley62,

Slimline can make the Pitts muffler with smoke for your OS 300/GP Pitts. It is not in their catalog, but they do have all of the measurements/dimentions/drawings made to make one that will fit properly. You might want to use an onboard glow driver and a battery backup system. The onboard glow driver cuts down on the holes needed in the cowl and the battery backup system gives you additional insurance and peace of mind.

Hide Signatures

(in reply to RCJake-rcu)
       Post #: 5

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 8/13/2004 8:28 AM   
JET FX



Posts: 2000
Score: 105
Joined: 1/20/2002
Last Login: 2/25/2013
From: Sydney, , AUSTRALIA
Status: offline 		I would really like to build a GP Pitts with the OS 300 combo and was just wondering if there is an onboard starter system for this engine?
Also what about engine cooling for the rear cylinder heads and airflow in and out of cowl, is there any signs of overheating, eg. power loss?

Cheers-

< Message edited by ozcan -- 8/13/2004 12:31:52 AM >

_____________________________

MARTY COWAN CEO
JET FX ~ JETS & WARBIRDS

Hide Signatures

(in reply to RCJake-rcu)
       Post #: 6

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 8/13/2004 4:37 PM   
RCJake-rcu


 

Posts: 0
Score: 100
Joined: 4/11/2003
Last Login: 4/28/2006
From: Corvallis, OR, USA
Status: offline 		ozcan,

I do not know of an onboard starter for the OS 300, but there may be one available somewhere. As far as the engine overheating, it has not happened with this one.

Smooth Landings...

Hide Signatures

(in reply to JET FX)
       Post #: 7

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 8/13/2004 4:41 PM   
JeffH


 

Posts: 1883
Score: 114
Joined: 1/17/2002
Last Login: 5/24/2013
From: Carrollton, VA, USA
Status: offline 		There is another option for an exhaust. Do a search for Keleo. He makes exhaust rings for radials and makes a muffler for this engine.
Go to Hobby Lobby's website for an onboard starter. They make one, but it isn't cheap!!!

Hide Signatures

(in reply to RCJake-rcu)
       Post #: 8

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 8/13/2004 6:11 PM   
rfw1953



Posts: 1346
Score: 100
Joined: 7/9/2002
Last Login: 8/25/2007
From: Hampton Cove, AL, USA
Status: offline 		Jake, I remember when you first posted the photos on this beauty. Again, very nice work. I sure like mine. Have over 90 flights on it now. Still holding together and flying well. Recently heard about the Cabbanes snapping, again, on the CE. Man that bothers me, but no problems on mine so far. Just something to watch.

Attachments
Click to see fullsize image.
Click for fullsize



_____________________________

Good Luck and Good Flying,
Roger

Hide Signatures

(in reply to JeffH)
       Post #: 9

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 8/13/2004 6:45 PM   
JET FX



Posts: 2000
Score: 105
Joined: 1/20/2002
Last Login: 2/25/2013
From: Sydney, , AUSTRALIA
Status: offline 		Jeff, thanks for the starter info the FEMA unit looks very interesting, I will make further inquiries as to its track record http://www.hobby-lobby.com/fema.htm

Also, who makes the 1/3 scale decal sets (Charlie Hillard) for the Pitts???

< Message edited by ozcan -- 8/13/2004 10:45:50 AM >

_____________________________

MARTY COWAN CEO
JET FX ~ JETS & WARBIRDS

Hide Signatures

(in reply to JeffH)
       Post #: 10

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 8/13/2004 10:07 PM   
JeffH


 

Posts: 1883
Score: 114
Joined: 1/17/2002
Last Login: 5/24/2013
From: Carrollton, VA, USA
Status: offline 		pro mark makes a set of transfers. They are pretty pricey, but they are the best.

Hide Signatures

(in reply to JET FX)
       Post #: 11

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 12/18/2012 5:07 AM   
thetireman1


 

Posts: 59
Score: 100
Joined: 3/25/2003
Last Login: 3/24/2013
From: Durham, NC, USA
Status: offline 		I am doing one with the OS300. Can you send the info please? Thanks

Hide Signatures

(in reply to RCJake-rcu)
       Post #: 12

RE: GP Pitts ARF With OS 300 Super Gemini Twin - 12/19/2012 12:48 PM   
Cobra1



Posts: 511
Score: 100
Joined: 2/15/2002
Last Login: 5/24/2013
From: Monrovia, MD, USA
Status: offline 		I hope you realize that this thread is 8 years old. Given that you might want to PM the member directly with your question. Just a thought.

Hide Signatures

(in reply to thetireman1)
       Post #: 13

Page:   [1]
All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> GP Pitts ARF With OS 300 Super Gemini Twin
Page: [1]





Jump to:


 
Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

RC Universe is a service of Internet Brands, Inc. Copyright © 2001-2013.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America


0.418RCU1