Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 14 of 14

  1. #1

    Join Date
    Aug 2007
    Location
    , AUSTRIA
    Posts
    71
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    Hope for Scale Props for SPs

    Hello all,

    recently I talked to [link]http://ramoser.de[/link] who make adjustable props for electrics. They upgraded their production line with bigger props, til now only for electrics. BUT they test the props for use in combustion engines and do believe to have some results in July. Some of the smaller diameters are already allowed for combustion use.
    The system is similar to the soloprop system, aluminium hub with separate blades. 2 - 4 blades, scale blade shape.
    Since there is a lack of scale props with suitable dimensions on the market I guess this are good news

    regards
    Andi

  2. #2

    Join Date
    Nov 2006
    Location
    royal oak, MI
    Posts
    39
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs


    I will be looking forward to hearing about some 18 to 20 inch diamiter 2 and 3 blade props from them . Adjustable pitch sounds like a great idea for our RCV engines .


    Guy.

  3. #3

    Join Date
    Aug 2007
    Location
    , AUSTRIA
    Posts
    71
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    Just seen that for now the info is only on the german page. See "Propellergrâße 16 D" which means propsize 16 D. Pitch range from 6 - 25 inch, propsize from 16,2 - 22,6 inch.

    regards
    Andi

  4. #4

    Join Date
    Nov 2006
    Location
    royal oak, MI
    Posts
    39
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs


    I found it . Very nice props .

    Thanks Andi......

    Guy.

  5. #5

    Join Date
    Feb 2002
    Location
    Richmond Hill, ON, CANADA
    Posts
    973
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    I've also been keeping an eye out on those guys to produce props for IC engines. It's always good to have more options for scale props available for the RCV SP line of engines.

    This is my custom made 1/8-scale hub with 18" 3-blades, reverse engineered from the original 1/5-scale Soloprop hub...
    [youtube]http://www.youtube.com/watch?v=fdA8_Rbj7oM[/youtube]
    [youtube]http://www.youtube.com/watch?v=p5DlvElmXLc[/youtube]

    Here's a closer look...
    [youtube]http://www.youtube.com/watch?v=3pagp2fy97U[/youtube]

    I wanted to make only one hub. I ended up making 15 hubs and sold them all. Soloprop is waiting for me to call them back regarding the design, but I'm finding it hard to make time now that a new-born baby has turned my life up-side down.

    Josh

  6. #6
    thebluemax's Avatar
    Join Date
    Jan 2002
    Location
    Mullica Hill, NJ
    Posts
    685

    RE: Hope for Scale Props for SPs

    Very cool Josh.

    Especially liked the set-up video. How does someone get one of those and what will they cost?
    My biggest worry is that my wife (when I am dead) will sell my R/C stuff for what I said I paid for it.

  7. #7

    Join Date
    Mar 2005
    Location
    Stafford, VA
    Posts
    33
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    Just visited the VarioProp website and it looks like they are done testing. According to their site, we are good to go on at least some of the blades for gas (and I assume glow) engines. I personally am interested in the 3-blade 16D hub with the 16.6" blades (good up to 6500 RPM on gas) for the RCV 60SP. However, I'm having trouble figuring out what I need to make it fit the shaft on this engine. Can anyone else figure out from the VarioProp website what would be needed? I also want to use the scale spinner dome.

    http://www.ramoser.de/home_e/variopr...rioprop_e.html

  8. #8

    Join Date
    Mar 2005
    Location
    Stafford, VA
    Posts
    33
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    OK, I think I've figured out what I need.

  9. #9

    Join Date
    Dec 2007
    Location
    Killen, AL
    Posts
    185
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    From what I can see, one would need the hub, blades, 5/16x24 prop nut, and spinner cap. All that totals around $136 US. Not a bad price for a scale prop! I may have to have one also. I like the sound of those 7 Euro blades too. At $30.50 each, the SoloProp blades are pretty pricey.

  10. #10

    Join Date
    Aug 2007
    Location
    , AUSTRIA
    Posts
    71
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    Received my 2-blade hub today, a spinner nut for the 120SP together with a pair of 19,9 inch and a pair of 17,9 inch SG blades. Quality is excellent, did not weigh yet but its low. The parts go together easily. I found that the crank is too long for the spinner nut (or the spinner nut too short), when the spinner nut is screwed fully in there are 10mm way to go to the prop. Contacted Mr. Ramoser, he offered to make a centering sleeve so I can get rid of the spinner nut (which is a heavy part) and use the original RCV screws for mounting the prop. As an alternative I think about removing the blunt end of the spinner nut so it can be screwed farther. There is no corrugation, neither on the rear nor on the front side of the blade hub, so I think I prefer the original lock nut.

    regards
    Andi

  11. #11

    Join Date
    Aug 2007
    Location
    , AUSTRIA
    Posts
    71
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    Today I made the first test runs. As planned I removed the originally prop nut and replaced it by the centering sleeve. Before mounting I balanced the prop and found it well balanced - no surprise, since the hub is CNC milled and the blades have the same weight. Well, the prop turned, , tracking of the blades is perfect. As expected the hub gets pretty hot, after a few minutes run you cannot touch it anymore. Since I have used GFK propellers before (Biela) I do not expect any problems. Nevetheless I will ask Mr. Ramoser about his opinion. Next step ist to adjust the correct pitch, that will need some test flights. The blades are very thin, similar to APC, so I hope for high rpms and maybe slightly more pitch than the APC provide.
    Below some pics of the original setup with spinner nut, which turned out to be too short for the crank of the RCV.
    Next is the mounted prop with centering sleeve and the RCV lock nut.
    And last is a pic of the blade, seen from the side. The tips of the blades are bent forward, for whatever reason.

    The weight of the blades+hub is 104 gramms. Togehter with the prop nut its a 140 gramms, another reason to skip the prop nut.

    So what do you guys think about aluminium propeller blades? Beside the shiny and very scale look I do believe it would perfectly aid cooling of the RCV.

    regards
    Andi
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Zx71803.jpg 
Views:	12 
Size:	223.9 KB 
ID:	1484847   Click image for larger version. 

Name:	Us53629.jpg 
Views:	11 
Size:	366.5 KB 
ID:	1484848   Click image for larger version. 

Name:	Ki19505.jpg 
Views:	11 
Size:	141.7 KB 
ID:	1484849  

  12. #12
    mimoore67's Avatar
    Join Date
    Apr 2003
    Location
    Brooklyn, MI
    Posts
    977
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    Hello,

    Just another source for a scale prop for the RCV SP series engines. I ordered a 16X8 and a 18X10! These are very wide and semi-scale to that of a Hamilton Standard prop, found on the P51 (Note, not all P51 had Hamilton Standard Props) Now which would you think would the better of the size???

    http://www.smigla.com/english/four-blade.html
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Qo41317.jpg 
Views:	11 
Size:	98.1 KB 
ID:	1571592  
    It\'\'s gotta be scale!
    Private Pilot - Aircraft Single Engine Land

  13. #13

    Join Date
    Dec 2007
    Location
    Killen, AL
    Posts
    185
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    Andi,

    I just bought the VarioProp 16D 3-blade hub with 18.6" round tip blades for my TF Corsair. I used a slightly different method of marrying the hub to my 120SP. I designed a spacer to fit behind the hub, with a 12mm dia. flange to fit into the back of the hub. The setup works great. I set the pitch at 12" and ground tested it today. The 120SP turns the prop at 4660 rpm. As with your hub, mine got pretty hot but the blades were fine. I believe we've found a winner here and this hub looks great!
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Kh17618.jpg 
Views:	14 
Size:	116.2 KB 
ID:	1591655   Click image for larger version. 

Name:	Rm37327.jpg 
Views:	18 
Size:	151.7 KB 
ID:	1591656   Click image for larger version. 

Name:	Hm24090.jpg 
Views:	17 
Size:	159.5 KB 
ID:	1591657  

  14. #14
    saramos's Avatar
    Join Date
    Dec 2003
    Location
    Northridge, CA
    Posts
    3,014
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Hope for Scale Props for SPs

    I like the idea of the aluminum spacer behind the hub. Adds just a little bit more heat disipation and moves the blades just a bit farther from the glow plug.


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 07:13 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.