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Thread: Ranger plans and pics

  1. #1
    Join Date
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    Default Ranger plans and pics

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    For those interested in building Ranger, the best source is my article in ModelYachting magazine. It includes a lot of build pics and very nice drawings done by Jim Linville from my rough originals. The magazine has been distributed to AMYA members, and is available for others from the Ship's Store at theamya.org.

    Given the difficulty of international mailing, etc., I am posting my originals as requested for those who can't get the magazine. They aren't as pretty, but they are what I build from. Designed displacement is 300 grams. I hope you enjoy the boat.

    Bill
    Attached Files Attached Files

  2. #2
    Join Date
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    Melbourne Australia
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    Default Re: Ranger plans and pics

    Hi Bill,

    Thanks for sharing your designs again.
    It looks interesting.

    Regards
    Peter & Clare

  3. #3

    Default Re: Ranger plans and pics

    Another great design Bill thanks !

    One question, what is the reason for the strong rocker and curved sheer if i may ask ?

  4. #4
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    Default Re: Ranger plans and pics

    Bill,

    Have down loaded and printed the plans at 100% scale.

    Can you tell me the overall length of the Ranger, as my plans look too big :-(

    I like the design, simple, and looks extremely well balanced.

    Looking forward to trying a depron hull for this one too.

    Scott

  5. #5
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    Melbourne Australia
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    Default Re: Ranger plans and pics

    Hi Bill,

    Forgot to ask.
    What is the initial anecdotal or empirical conclusion regarding performance?
    Is it faster than your previous designs?
    Is it faster to windward?
    Does it point as high?
    Is it as fast downwind?
    Is it faster in all conditions, light and heavy?
    How much does it like to submarine?
    Is the submarining exacerbated by the high position of the sail?
    Are there any other positive or negative effects of the sail position?

    Regards
    Peter & Clare

  6. #6
    Join Date
    Nov 2004
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    Default Re: Ranger plans and pics

    Lots of questions...but here goes.

    Meatbomber, the rocker is to add displacement to the narrow boat (wide/shallow, narrow/deep) while keeping the ends up for better tacking...submerging the bow and stern seems to make it resist turning, as you might expect. With Footys, you have to accept that they are unlikely to be the most graceful looking boats...for that, build a 10R '-) The sheer is to raise the bow height for reserve bouyancy because Footys like to dive going downwind...also because I think sheer is prettier.

    Scott, if you printed on legal paper at 100% it should be fine...the leading edge of the fin should be 230mm.

    Peter/Clare:

    Performance looks good overall, but it hasn't been tested in real competition.

    Probably not faster overall, but maybe in light airs...I think we have seen that the speed limitation of Footys is their size, and many designs appear to be equally competitive...but I keep looking for the best combination of the myriad design tradeoffs.

    It points beautifully, and sails hands-off upwind even in chop like the pics...Scott Spacie took them while sailing in pretty strong wind.

    It doesn't submarine at all (LOL) except in big gusts...actually I'm quite happy that the reserve bouyancy in the bow does it's job pretty well. The price is more bow wave than I like under certain conditions...I'll be working on that. See attached "outtake" pics. Submarining does not appear to be exascerbated by the high rig.

    Here's some comments from Scott: "Bill, This morning, at 2:24, I had an ‘aha’ moment (actually it was more of a ‘duh’ moment). I figured out what caused the handling problems I had had yesterday and how I should have rigged the boat to prevent it. It caused me to reflect on what a great job the Ranger really had done. A lot of the time when I was fumbling with the camera, the boat was sailing ‘hands off’ in as bad a chop as I have ever seen at Heckscher. At the same time, ten miles south, on a smaller, more protected pond, the wind was literally shredding a fleet of Victorias – including the #4 boat at the nationals! As you noticed in the pictures, the bow worked exactly as it was designed to do. The boat never submarined or did the Razor 7 (both of them) trick of sailing happily with solid water back past the mast. I still have no idea of relative speed as I can’t find another skipper to sail against. Orangeburg never thawed, the guys down south had gone home when I got there, and we are back in a cold snap that is too much for me, so that question will go unanswered for a while yet. The red-trimmed rig you saw in the pictures is the B2 one we talked about after the nationals last year. It is half way between the B and the C and was just perfect for winds that gusted in the high 20’s."

    The pros/cons of the high rig are undetermined, so far. Some argument has been made that it might actually improve lift downwind...but I'm not ready to to stake any claims. I did it to clear the box...no other reason.

    One of the brilliant things about the box rule is that there's no free lunch. To increase LWL, you give up fin depth and raise the rig which reduces righting moment...classic tradeoffs. When Roger proposed the box dimensions, I think he got it just right...enough room to play, but ya gotta pay.

    Bill
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    Last edited by mudhenk27; 03-05-2011 at 09:01 AM. Reason: add pics

  7. #7

    Default Re: Ranger plans and pics

    dont get me wrong Bill i think it`s an awesome design and your reasoning behind it makes all sense now that you explained, thanks for that
    as soon as i`m home i`ll build one of these too

    Oh and i think too that sheer is pretty, the sloping transom also looks great!
    i`ll have to see if i can make a 55% one too, with the servos out on top it should work

    cheers
    Phillip

  8. #8
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    Default Re: Ranger plans and pics

    I didn't take offense, Phillip...Footys aren't that graceful, but they sure are cute.

    It would be fun to see you get a 55% fleet going on that pool....is that a creative way to attract women...like walking a cute dog?

    All the best....Bill

  9. #9
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    Default Re: Ranger plans and pics

    Yes Bill, another of my dreaded rambling comments!

    So it seems that you've finally gone diagonal and angled in the Ranger design. The rig solution is pretty ungainly and a shorter fin is another of the tradeoffs (although there may be a drag advantage to a shorter fin), and the rudder has to be mounted farther forward (again undesirable because it cuts the distance between the two foils and reduces tracking). As you know I use a raised cutwater to bring the deck up to the rim of the box and shield the mast tubes from flying free and vulnerable.

    You may not like the look but it does allow for a narrower bow and bow overhang. The overhang puts more boat (read buoyancy) forward of the waterline end and combined with the peaked and angled deck keeps the boat controllable when it dives by keeping water from loading up on the deck and holding the nose down. I have sailed downwind on just the nose without the big bow wave and with no apparent loss of speed. BTW, I sail upstate in winds and waves that I wouldn't sail any of my other boats in. A watertight Footy in whitecaps is a whole lot of fun!

    Bill, I have a suggestion which you may or may not like. I know that you are designing these Footies with an eye to easy construction, and that is to be commended. I like your move to try to streamline an awkward set of parameters but the bulbous bow and the huge bow wave it throws up seem to me to be big negatives. The suggestion I have is to use Roger Stollery's bow design to gain the added bouyancy. The Ranger already has a wide deck, all that it would take would be another partial panel on each side (perhaps only extending a third or half way aft and incorporated into that graceful sheerline) to make the flair. Then you would gain a narrower entry for most conditions and have the reserve for the tough going. It works on all of Roger's designs but it hasn't seen action on a narrow boat yet. It could be interesting and wouldn't be that much more difficult for novice builders to construct either.

  10. #10
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    Default Re: Ranger plans and pics

    Thanks Niel, I actually appreciate your contributions a lot...but can't resist ribbing you a bit now and then

    Of course I'm aware of your approach, and I know it works well. We all have our own pet ideas, of course, and I never felt that the extra LWL offset all the other tradeoffs on 3D designs...I'm still skeptical.

    Though your cutwater works, my other boats like the Razor3 and 4 sail straight and remain controllable when they go bow under, without the complexity of a raised foredeck. Whether or not there might be a speed advantage with your approach could be a factor, but I don't care for the complexity.

    Speaking of complexity, I have nothing against your suggestion to use Roger's idea like AWK. I built a Rogered Ranger 2 days ago. I didn't add another panel, though...I took advantage of the 1/64 ply to bend the upper hull panel as needed. It's a much trickier build than the original Ranger, though...which I guess is why Roger uses a jig to build AWK. I remain steadfast in my preference to provide people with boats that are easy to build and yet can be competitive, so I'll look for a different solution.

    All the best...Bill
    Last edited by mudhenk27; 03-06-2011 at 08:07 AM. Reason: cant spel

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