RE: Great Planes RV-4 .60-.90 ARF  
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All Forums >> RC Airplanes >> ARF or RTF >> RE: Great Planes RV-4 .60-.90 ARF
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RE: Great Planes RV-4 .60-.90 ARF - 4/15/2007 2:08:41 PM   
MOTORMAN37



Posts: 2091
Joined: 10/26/2002
From: CLINTONVILLE, WI, USA
Status: online 		Skorman,
That is the main reason I put a 2 stroke in mine. Dubro and all the other manufactures of silocone extensions do not recommend them for four stroke due to there much highrer exhaust temperture. Call them if you do not believe me. You could get a piece of teflon tubing from Central Hobbies since that is the only non-metal material that will withstand the exhaust temps.



NMPHTT
Teflon Header Tube with Clamps




$15.95



< Message edited by MOTORMAN37 -- 4/15/2007 2:21:05 PM >

(in reply to skorman)
       Post #: 226

RE: Great Planes RV-4 .60-.90 ARF - 4/15/2007 3:38:31 PM   
Birman


 

Posts: 425
Joined: 9/3/2006
From: Racine, WI, USA
Status: online 		McMaster Carr has teflon tubing with a high temperture rating up to 500 degrees. I priced out a piece for an OS 91 FS, .375 ID X .500 OD and it came out to $8.36 per foot. You can find clamps there too.

_____________________________

Club Saito Member #489

(in reply to MOTORMAN37)
       Post #: 227

RE: Great Planes RV-4 .60-.90 ARF - 4/15/2007 7:29:03 PM   
chris8105


 

Posts: 368
Joined: 8/16/2005
From: Burlington, KY, USA
Status: offline 		I am using a Magnum 91 fourstroke. with a 14x6 apc prop and I have a problem. After I put on the spinner back plate, the prop, the prop washer, and the nut, I dont have any threads left for the spinner adapter. Anyone else run into this problem?

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< Message edited by chris8105 -- 4/15/2007 7:38:08 PM >

(in reply to Birman)
       Post #: 228

RE: Great Planes RV-4 .60-.90 ARF - 4/15/2007 8:23:26 PM   
MOTORMAN37



Posts: 2091
Joined: 10/26/2002
From: CLINTONVILLE, WI, USA
Status: online 		Chris,
First off, how many turns can you get it on before it bottoms out? You could run a wood prop which has a much thinner hub. I am running True Turn spinner which has a thinner back plate, there is plenty of room. Although I am talking about a 2 stroke Magnum, the cranks are identical in length. I also allways pin my spinner backplate to the drive washer with a 3/32 needle bearing. I have never had an aluminum spinner loosen up. By doing this, you eliminate the possibility of the aluminum to aluminum from slipping, then the knurling on the spinner really does the work of keeping it tight. You could probaly eliminate the double nut setup and use a conventional spinner adapter which would fit fine.

< Message edited by MOTORMAN37 -- 4/15/2007 8:29:30 PM >

(in reply to chris8105)
       Post #: 229

RE: Great Planes RV-4 .60-.90 ARF - 4/15/2007 8:48:21 PM   
chris8105


 

Posts: 368
Joined: 8/16/2005
From: Burlington, KY, USA
Status: offline 		I can only get that spinner adapter on about three turns. Not to comfortable with that. I have a 14x6 wooden Zinger prop that fits on there fine, I have always been partial to APC props though. I have had plenty of magnum 91 four strokes with many apc 14x6 props with spinners on them and I have never had this problem before. Its mind boggling.

(in reply to MOTORMAN37)
       Post #: 230

RE: Great Planes RV-4 .60-.90 ARF - 4/15/2007 8:51:07 PM   
ExperimentalAviator



Posts: 161
Joined: 1/31/2003
From: Tuscaloosa, AL, USA
Status: offline 		Steve,

This is how I have been holding my exhaust deflectors on for over four years with no problems. It is .032 stainless steel safety wire used in aviation maintenance, but I'm sure any good wire will work.

Mike

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(in reply to chris8105)
       Post #: 231

RE: Great Planes RV-4 .60-.90 ARF - 4/16/2007 5:15:35 AM   
gunfighter


 

Posts: 629
Joined: 7/13/2002
From: Canyon Lake, TX, USA
Status: offline 		Chris - The adapter REPLACES the prop nut. It does not go on WITH (or on top of) the prop nut. The included adapter nut will not fit the OS .91, you will have to get one with the right threads. You need 5/16 - 24 for the OS.

The included spinner is so heavy and out of ballance, I replaced it.

(in reply to chris8105)
       Post #: 232

RE: Great Planes RV-4 .60-.90 ARF - 4/16/2007 5:54:21 AM   
chris8105


 

Posts: 368
Joined: 8/16/2005
From: Burlington, KY, USA
Status: offline 		Thanks for the info gunfighter. All I have to do now is figure out the flaps with my radio. If anyone knows about the Futaba 7C and flaps, please refer to post 220.

< Message edited by chris8105 -- 4/16/2007 6:15:21 AM >

(in reply to gunfighter)
       Post #: 233

RE: Great Planes RV-4 .60-.90 ARF - 4/16/2007 11:43:49 AM   
MOTORMAN37



Posts: 2091
Joined: 10/26/2002
From: CLINTONVILLE, WI, USA
Status: online 		Gunfighter,
I bought a custom cut True Turn for mine. My stock spinner was so out of ballance that when you let go of it on the magnetic ballancer, it would do two rev's on its own.

(in reply to chris8105)
       Post #: 234

RE: Great Planes RV-4 .60-.90 ARF - 4/16/2007 12:24:38 PM   
skorman


 

Posts: 521
Joined: 1/12/2003
From: Virginia Beach, VA, USA
Status: online
quote:

ORIGINAL: gunfighter

Chris - The adapter REPLACES the prop nut. It does not go on WITH (or on top of) the prop nut. The included adapter nut will not fit the OS .91, you will have to get one with the right threads. You need 5/16 - 24 for the OS.

The included spinner is so heavy and out of ballance, I replaced it.


The spinner adapter nut that came with my RV-4 fits the OS 91FS perfectly.

_____________________________

Steve

(in reply to gunfighter)
       Post #: 235

RE: Great Planes RV-4 .60-.90 ARF - 4/16/2007 12:56:11 PM   
skorman


 

Posts: 521
Joined: 1/12/2003
From: Virginia Beach, VA, USA
Status: online
quote:

ORIGINAL: ExperimentalAviator

Steve,

This is how I have been holding my exhaust deflectors on for over four years with no problems. It is .032 stainless steel safety wire used in aviation maintenance, but I'm sure any good wire will work.

Mike


That looks like a great idea. Thanks for the tip Mike.

_____________________________

Steve

(in reply to ExperimentalAviator)
       Post #: 236

RE: Great Planes RV-4 .60-.90 ARF - 4/16/2007 3:28:50 PM   
chris8105


 

Posts: 368
Joined: 8/16/2005
From: Burlington, KY, USA
Status: offline
quote:

ORIGINAL: skorman


quote:

ORIGINAL: gunfighter

Chris - The adapter REPLACES the prop nut. It does not go on WITH (or on top of) the prop nut. The included adapter nut will not fit the OS .91, you will have to get one with the right threads. You need 5/16 - 24 for the OS.

The included spinner is so heavy and out of ballance, I replaced it.


The spinner adapter nut that came with my RV-4 fits the OS 91FS perfectly.


Mine fits my Magnum 91 as well, which has the same 5/16 24 thread. I checked Towers website and it says the spinner adapter that comes with the plane is a 3/8 24 thread.

(in reply to skorman)
       Post #: 237

RE: Great Planes RV-4 .60-.90 ARF - 4/16/2007 4:50:51 PM   
gunfighter


 

Posts: 629
Joined: 7/13/2002
From: Canyon Lake, TX, USA
Status: offline 		Mine came with a 3/8 - 24 thread adapter and I needed a 5/16 - 24 for my OS .91 Surpass.

I assumed that all the planes came with the same adapter, therefore, you would need to get another one. I guess they just throw in any adapter and leave it to chance??

If someone finds an effective way to balance that aluminum spinner, let me know. Like Motorman said, Mine was so out of balance I could not use it without vibrating the nose of the plane off! AND it is VERY heavy!

(in reply to chris8105)
       Post #: 238

RE: Great Planes RV-4 .60-.90 ARF - 4/17/2007 11:45:45 AM   
Kostas1



Posts: 1229
Joined: 12/19/2005
From: AthensAthens, GREECE
Status: offline 		Anyone that maidened his beauty and made a video to see it??????????????????????????