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Thread: Any Ragwing Projects here?

  1. #76
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    Re: Any Ragwing Projects here?

    I would expect the stick ribs to be lighter than equally sized birch ply ribs. After all, spruce is lighter than birch. The big difference though is are the ply ribs going to be the same size as the stick ribs? I would expect they need a bit more material to make up for the weakness of the grain direction not matching the direction of each piece. With stick built wings, most pieces will have the stess running pretty much from one end to the other, parallel to the grain. With plywood ribs I would expect they may need a bit more heft in some areas to get that same strength.

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    Re: Any Ragwing Projects here?

    Thought I would check in to see if anyone has made any progress..
    Who has a project going ?
    Who has completed their project?

  3. #78
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    Re: Any Ragwing Projects here?

    I bought a set of plans, building instructions, video, etc. for the RW-2 "Special" from a gentleman here on HBA several months ago. I started with rib and spar construction. The last of 8 spars was finished, cleaned up of T-88 "squeeze-out" and put aside yesterday. The 34th and final rib got assembled in my jig this morning, with just the gussets on the backside to go after it's cured. I have much of the material (Northern White Pine) cut already for wing and fuselage assembly.

    For powering the "Baby Pitts" RW-2, I have a 32 HP 1/2 VW. I have heard that even with building lightweight, and my relative light weight of about 155# fully dressed, that 32 HP may not be enough oomph for reasonable performance. I need to make Part 103 weight of <254#, and that might prove to be difficult to start with. Another engine that I'd consider would be the Verner 3VW 3-Cylinder radial, but at $7,000-8,000 that would be hard to swallow. The Verner has a slightly lighter-weight advantage over the 1/2 VW and it certainly would look right at home on the nose of a biplane. I certainly can't see putting a 2-stroke on the nose.

    I also have an "on again - off again" start on building a Hummel Ultracruiser. I may just put the RW-2 project on the back burner for a time and see how I feel about going forward with it in a month or so, and in the meantime go back to work on the Hummel UC once again.

    Lynn
    Last edited by lake_harley; January 6th, 2017 at 10:55 PM.

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    Re: Any Ragwing Projects here?

    Quote Originally Posted by lake_harley View Post
    I bought a set of plans, building instructions, video, etc. for the RW-2 "Special" from a gentleman here on HBA several months ago. I started with rib and spar construction. The last of 8 spars was finished, cleaned up of T-88 "squeeze-out" and put aside yesterday. The 34th and final rib got assembled in my jig this morning, with just the gussets on the backside to go after it's cured. I have much of the material (Northern White Pine) cut already for wing and fuselage assembly.

    For powering the "Baby Pitts" RW-2, I have a 32 HP 1/2 VW. I have heard that even with building lightweight, and my relative light weight of about 155# fully dressed, that 32 HP may not be enough oomph for reasonable performance. I need to make Part 103 weight of <254#, and that might prove to be difficult to start with. Another engine that I'd consider would be the Verner 3VW 3-Cylinder radial, but at $7,000-8,000 that would be hard to swallow. The Verner has a slightly lighter-weight advantage over the 1/2 VW and it certainly would look right at home on the nose of a biplane. I certainly can't see putting a 2-stroke on the nose.

    I also have an "on again - off again" start on building a Hummel Ultracruiser. I may just put the RW-2 project on the back burner for a time and see how I feel about going forward with it in a month or so, and in the meantime go back to work on the Hummel UC once again.

    Lynn
    Lynn, In the boating world we call this MBS (Multiple Boat Syndrome) I think you have a severe case of the MAS (Multiple Aircraft Syndrome)


    I'm not judging at all....Maybe a little jealous

    I have my own Multiple airplanes that I would like to build....just gotta get the Mini-max done first......

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    Re: Any Ragwing Projects here?

    Glad to see you guys building.....keep up the good work.

    Is anyone building a RW19 or RW20 at this time?

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    Re: Any Ragwing Projects here?

    Quote Originally Posted by skybound View Post
    I was looking at building the RW-22 and bought the plans. When I was studying up on them, I noticed some issues with the design CG falling within the limits that were called out in the plans. If I remember correctly, normal loads (combinations of 180 lb pilot, 160 lb pax, and full/no fuel) would have had it forward and after of the limits called out in the plans. A bigger issue though was that in order to have the CG fall in range, the landing gear would have had to be moved to right behind the firewall. Otherwise the tailwheel would have ~70 lbs of uplift. I emailed Roger about it but I never heard back from him.
    I wanted to build the RW9 Motor Bipe. Which I believe has the same fuselage as the Aeriel.

    I mentioned this to a famous and award winning ultralight designer and he advised me that this design has a major and dangerous flaw. The loadpath through the cockpit will allow the fuselage to FOLD UP in a hard landing and drive your forehead into the trailing edge of the upper wing (or rather the cut out). I asked Roger about it and his reply was (and I quote):

    "Yeah I have been told about that by real designers, I don't design airplanes I draw them"

    His exact words.

    Click image for larger version. 

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    Last edited by fly_boy_bc; February 2nd, 2017 at 07:02 PM.

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    Re: Any Ragwing Projects here?

    Quote Originally Posted by fly_boy_bc View Post
    I asked Roger about it and his reply was (and I quote):

    "Yeah I have been told about that by real designers, I don't design airplanes I draw them"
    And there it is, the final nail in the coffin of any aspirations I had of building one of his airplanes.

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    Re: Any Ragwing Projects here?

    Quote Originally Posted by Tiger Tim View Post
    And there it is, the final nail in the coffin of any aspirations I had of building one of his airplanes.
    No doubt, everyone must make their own decisions, but depending on the Rag Wing design chosen I wouldn't see a problem. By what I've seen of the plans, much of the design/structure in models I've seen is virtually identical to that of a MiniMAX. With the number of MiniMAXs that have been built and flown successfully I don't think their design would be questionable, so I'd feel comfortable with some transference of confidence. Maybe that's too optimistic? One other thing I'd mention about Rag Wing planes is that a fellow in our EAA chapter has built and flown two of them without incident, so that instills some confidence in the design too.

    Just my thoughts....and worth the price charged.

    Lynn

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    Re: Any Ragwing Projects here?

    Just avoid the one fuselage (RW9) and do NOT use the bends near the end of the interplane struts. Rogers planes have been built for a lot of years. Just stick to his better and more popular drawings and get assistance from experienced builders. They know where the issues are. BTW his plans look like they were drawn on a paper napkin at the coffee shop and are NOT to scale (there is NO reason to pay the premium for PRINTED plans). Since they are only 25$ now rather than $100 you are at least no longer being ripped off.

    If you buy a plan from somebody like Ed Fisher from Raceair THEN it is WORTH the expense of printed plans as they are DRAFTED and FULL SIZE. Roger Manns scribbled drawings could be legitimately shared through handheld photography.

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    Re: Any Ragwing Projects here?

    Has anyone ever critiqued the RW19 plans for any flaws?

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    Re: Any Ragwing Projects here?

    Greetings all
    I am building a 19, slowly... started on wings now, building stick ribs. I have the tail built
    And am waiting a shipment of plywood and some more spruce to arrive in a few weeks so
    so I can put some bigger parts together. Need to get something mocked up to be able to sit in
    and make plane noises...
    I
    Would love to hear from anyone else building one!
    Tom

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    Re: Any Ragwing Projects here?

    Started on a RW1 ultra-piet. we will see how it goes. would love to hear from others who may have built an ultra piet or other ragwing

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