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Author Topic: WTB Rev Up 11 1/2x6 or 6w  (Read 842 times)

Online Dave_Trible

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WTB Rev Up 11 1/2x6 or 6w
« on: November 28, 2021, 05:51:53 AM »
I am looking for at least one or more of these for an old Tigre .46 I have.  If I can find at least one I can mold carbon from it.

Dave
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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #1 on: November 28, 2021, 07:26:34 AM »
Thank you a bunch.  Back then I had tried about everything available including modified props.  There was just something special about the 11.5x6 (can’t remember if they were Wide - I know not EW),  at least when used on my Music design of that period.  I’m thinking to recreate my 1985 Nats machine and am trying to get all the original bits together.  In a stroke of luck I found an original Big Art grooved muffler for it.

Dave
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Offline Doug Moisuk

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #2 on: November 28, 2021, 08:36:49 AM »
I too have found the Rev-Up 11.5 X6 the  best on my ST46s. Not wide or extra wide. Sorry I only have two left for myself. I have also found a 11/6 APC works well. Try that before you go to all the work of moulding a CF RU.  If you find a cask of the RU 11.5 x 6 let me know. Cheers
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Offline Dan McEntee

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #3 on: November 28, 2021, 10:09:26 AM »
   Another thought is to try the Rev-Up-12-5 drone props that are popping up from time to time. I have a memory of some one suggesting that the 12-5 and 12-6 cut down to 11 1/2 was a good prop for the ST.46 and I remember trying it to good success way back when. The drone 12-5s cut down could be repitched and give you some extra blade width. let me know if that interests you. I don't know if I have ever seen a Rev-Up 11.5X6>>
   Type at you later,
   Dan McEntee
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Online Massimo Rimoldi

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #4 on: November 28, 2021, 11:26:01 AM »
Quote from: Dave_Trible on November 28, 2021, 05:51:53 AM
I am looking for at least one or more of these for an old Tigre .46 I have.  If I can find at least one I can mold carbon from it.

Dave

Hi.
You can probably avoid the job, it looks like someone has already done it

http://eliminatorprops.com/store/index.php?main_page=product_info&cPath=1_14&products_id=208

Massimo
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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #5 on: November 28, 2021, 11:47:28 AM »
Well thanks for that!  I met this gent and had a good chat with him at the Nats.  Didn’t know he did much other than combat props.  Will get in touch.  I’d still buy a few wood ones if they are out there.
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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #6 on: November 28, 2021, 11:52:32 AM »
Quote from: Dan McEntee on November 28, 2021, 10:09:26 AM
   Another thought is to try the Rev-Up-12-5 drone props that are popping up from time to time. I have a memory of some one suggesting that the 12-5 and 12-6 cut down to 11 1/2 was a good prop for the ST.46 and I remember trying it to good success way back when. The drone 12-5s cut down could be repitched and give you some extra blade width. let me know if that interests you. I don't know if I have ever seen a Rev-Up 11.5X6>>
   Type at you later,
   Dan McEntee
Dan I have a bag of those I think were sold as 12-6 to me.  I might fool with those some.  Back then I had found the 11-7 was actually closer in use.  As suggested,  I may also try the APC 11-6.  The idea of a carbon clone appeals because I could tweak the pitch like I do on the RO Jetts.

Dave
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Offline Doug Moisuk

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #7 on: November 28, 2021, 12:33:42 PM »
If they are 11.5 x 6 and Dan doesn’t take them all I would buy some of them.
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Doug Moisuk
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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #8 on: November 28, 2021, 02:00:07 PM »
Sorry Doug,  big misunderstanding.  What I have are unmarked RevUp 12-5 drone props that someone sold to me as 12-6.  I don’t think Dan is looking to buy anything.
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Offline Dan McEntee

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #9 on: November 28, 2021, 02:28:12 PM »
Quote from: Dave_Trible on November 28, 2021, 11:52:32 AM
Dan I have a bag of those I think were sold as 12-6 to me.  I might fool with those some.  Back then I had found the 11-7 was actually closer in use.  As suggested,  I may also try the APC 11-6.  The idea of a carbon clone appeals because I could tweak the pitch like I do on the RO Jetts.

Dave

      Check the drone props on a pitch guage. All I have checked have been 5 inch pitch, but I have repitched them by heating the blade near the hub and then twisting a bit. I think blade shape and thickness should be near what you want to either use as is or use as a pattern f or a mold . Another off the shelf prop I would try is a 11-6 Xoar. The Xoar props I have tried on my ST.60's have worked very well and been pretty true to pitch.
   Type at you later,
    Dan McEntee
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Offline Gerry Glier

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #10 on: December 01, 2021, 06:46:34 AM »

  Found one ! Actually I have six new and a few good used ones. Yes, still something special about this prop on a Tigre 46.
  I will send along the best new one for your carbon mold project. If Steve at EP can still supply them I need to try one.
  Thanks again Dave for your Contest Director efforts at the 2020 and 21 Nats . 
  Such a treat and honor for me alongside so many Staff and Entrants whose character and credentials were absolutely first rate.
  Gerry
  Visualscape1@yahoo.com
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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #11 on: December 01, 2021, 07:58:40 AM »
Hi Gerry and thank you!  Let me know what I owe you.

Dave

9509 Melrose Apt. 3
Overland Park, KS. 66214

Look forward to seeing you next year!

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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #12 on: December 01, 2021, 02:23:19 PM »
Quote from: Ty Marcucci on December 01, 2021, 11:16:41 AM
Yesterday after reading your request, I searched through every prop I have and no 11 1/2 x 6, but many 11 x 6.  Never have I ever seen an 11 1/2 x6. I have well over 150 props.  Some are w and a few are EW. D>K
Ty I don't know how common they were or how I got on to it but it really does seem to be the holy grail of props for the ST .46.  It turns power into thrust better that anything I tried and was about the right load for the engine.  My only wonder/concern about a carbon copy is weight-we'll see.  I had one (47 oz.) airplane with a cowling up too close to the prop and had to go to an 11-7 to get back the thrust I had blocked with the cowling. 

Dave
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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #13 on: December 01, 2021, 06:43:57 PM »
Quote from: Motorman on December 01, 2021, 05:58:09 PM
carbon prop can be thinner on the back if you flatten the hump behind the high point. It could be thinner overaThe ll and still be strong enough. The hub can also be minimized to save weight. I'd be worried about lifting the tips in the molding process making the carbon version thicker than the wood. I made an over arm with screws going down to the prop to hold against flexing.

Motorman 8)
I doubt I’d have that issue.  My molds are two part closed molds,  clamped under pressure.  The excess material oozes out until the molds are in full contact.  Then let cure at least 12 hours before I open the molds.  The hard part is learning the right amount of carbon to use.  The props are pretty stable after that.

Dave
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Offline Al Ferraro

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #14 on: December 01, 2021, 08:20:50 PM »
 I may also try the APC 11-6. 

Dave
[/quote]
  FYI the APC 12x5 is a very good prop for the ST.46
Al
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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #15 on: December 02, 2021, 07:48:14 AM »
I think I see what you are talking about.  I glue the buck down to a board and make the mold over it.  The only issue I think happens sometimes is the heat from the epoxy as it sets might affect the prop pitch a little.  The finished mold can yield a tad less pitch than the original.

Dave
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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #16 on: December 02, 2021, 09:01:17 AM »
Ah!  I use Superfil under the blades.  It’s too soft to push anything...  a little clear tape on the blades backside keeps it from sticking to the blade much.  Usually takes a second touch up application to backfill what sagged out due to gravity.

Dave
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Offline Gerry Glier

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #17 on: December 02, 2021, 03:25:39 PM »
Props on the way Dave ! 1 NOS 1 useable….
Let’s do a DQ Oreo blizzard at Muncie 22 for payment.   :)
Gerry
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Online Dave_Trible

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Re: WTB Rev Up 11 1/2x6 or 6w
« Reply #18 on: December 02, 2021, 03:41:50 PM »
You got it Gerry!

Thank You.
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