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    The RSCB Bow

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    asianassassin325

    Posts : 5
    Join date : 2011-06-28
    Age : 22
    Location : Cairns

    The RSCB Bow

    Post  asianassassin325 on Wed Mar 14, 2012 1:13 pm

    This is my first post so is apologize if I make any mistakes (I really hope I've got image uploading worked out properly), but here goes:

    A few weeks ago I Built a homemade that i call the RSCB Bow, which is essentially a Bow (without a catch) that uses a RSCB with very little dead space.
    When I built it I had intended to do a write-up, but unfortunately my SD card broke and I lost all pictures of the production phase, but ive decided its a nice enough blaster to deserve to be posted in the homemades thread anyway. Everything was mechanically fastened so i should be able to post pictures of most of the parts

    I designed the bow on the concept that if I could create the RSCB set-up with minimal dead space, it would be an ideal Clip system because i would have to point the blaster down each time I begin to prime it which would feed darts without having to think about it.

    I honestly don't know how original the blaster I built actually is, but I can honestly say that I built it completely from my own ideas in my own head and planned it from start to finish using my own thoughts and didn't copy any part of the bow from another home-made. However i do realize that it looks very similar to the Dracbow (fortunately, it fires better than the Dracbow).

    This is the result:

    I used 40mm DWV PVC for the plunger tube with a 32mm plug for the plunger head, this creates an absolutely perfect seal.
    The Bow arms are 15mm upvc, as are all of the tee's on the bow.
    This picture gives a basic idea of how the bow arms are attached to the front of the blaster and how air flows up into the RSCB without spreading into the Front Tee and the bow arms.

    The Red filled area shows where I filled with epoxy putty to stop air flow.

    Here are some more pictures:

    Notice how the Tee leading out of the plunger tube and into the Tee that connects the bow arms, also acts as a the 90 degree elbow for the RSBB. This means the RSCB does not have the dead-space from a coupler, then a full elbow, its simply the dead-space of the elbow, I also inserted a piece of 16 mm into the end of the tee that meets the plunger tube, and the end leading up, to reduce dead-space. I made the piece of 16mm leading up long enough to connect into the top Tee, so that there is no dead-space there either.


    Here is a shot of the 40 mm plunger tube


    This shot shows down the 40mm plunger tube where the Tee that acts as the elbow for the RSCB sits in the end of the plunger tube.


    Here are some shots of the plunger rod and head



    Its basically a piece of 15mm UPVC with a end-cap at one end, with a 32mm bath plug screwed into that, and a Tee at the other end.
    And yes, there are to Recon springs on there, though they do close to nothing, I had them sitting around and didn't have anything to put them in, so I threw them on the Bow. They only really made about 5ft difference in ranges, so if I ever decide I need them for another project, ill probably just pull them out. But since I added the springs, I had to add a spring stop, I simply used a 40mm end-cap and drilled a hole in the centre of it big enough for the 15mm UPVC to slide through freely.

    For the bow string I used auto electrical wire, this stuff works great because its extremely strong and shouldn't ever snap, and its coated in rubber, so you cant ever cut yourself on it.


    Overall I'm really pleased with the result.


    Its not the most practical of blasters, but it is extremely fun. The concept with the RSCB was extremely successful and i can shoot of all 6 rounds in very little time. This would make a very fun HVZ weapon, though its probably not practical enough for serious NIC wars.
    I find the ranges can be inconsistent based on how you release the priming rod, if you release it quickly and smoothly, the ranges are excellent, however if your not fast enough and you slowly let go, the ranges can be reduced by a fair bit.
    When it is raining less I will do a range test and give you the exact figures, but from memory, with a 6 shot clip I got about 85ft on average, and on a good shot where I released the Priming rod quickly, I could get up to 110ft. Though you shouldn't quote me on those ranges, my memory often fails me.
    Because there is no catch, the blaster can also be very inaccurate do to recoil, but the rate of fire is great.
    This is a very cheap and easy homemade to build and is really fun blaster, it only cost me about $15 to build, though I get considerable discounts on PVC fittings since my mum works at a plumbing store.
    I hope you guys like it!



    Last edited by asianassassin325 on Thu Mar 15, 2012 1:36 am; edited 1 time in total
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    TylerMaxwell

    Posts : 211
    Join date : 2012-01-19
    Age : 21
    Location : Bundaberg Queensland

    Re: The RSCB Bow

    Post  TylerMaxwell on Wed Mar 14, 2012 1:23 pm

    That is really cool man, I want to make my own, 85 feet is great.
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    sniperdude49

    Posts : 282
    Join date : 2011-11-01
    Age : 18
    Location : Logan

    Re: The RSCB Bow

    Post  sniperdude49 on Wed Mar 14, 2012 10:36 pm

    84 feet with a rscb! how much would it be singled^_^ and you should use bungee chord


    Last edited by sniperdude49 on Wed Mar 14, 2012 11:00 pm; edited 1 time in total
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    Eclipse

    Posts : 339
    Join date : 2010-09-27
    Age : 19
    Location : Sydney

    Re: The RSCB Bow

    Post  Eclipse on Wed Mar 14, 2012 10:52 pm

    Nice job. I want to make one now too. Not a complicated build, but I reckon the results would be worth it. My dad used to work at a plumbing store as well, so I have 20m of 15mm PVC and lots of fittings sitting around. I've also got a bit of 40mm as well. So this would cost me virtually nothing.
    avatar
    lech

    Posts : 106
    Join date : 2011-11-15
    Age : 29
    Location : Preston, Victoria, Australia

    Re: The RSCB Bow

    Post  lech on Thu Mar 15, 2012 2:59 am

    Looks good. I would suggest minimizing the PVC Tees to lower the profile of the RSCB. You could also add a clothespin trigger to this blaster then you wouldn't have to worry about releasing the plunger consistently and would make it a lot more wieldly.
    avatar
    False

    Posts : 253
    Join date : 2010-04-25
    Age : 19
    Location : Gold Coast, Queensland.

    Re: The RSCB Bow

    Post  False on Fri Mar 16, 2012 7:58 am


    This is really cool, nice work!


    sniperdude49 wrote:84 feet with a rscb! how much would it be singled^_^ and you should use bungee chord

    Aside from strength, it doesn't really matter what material the 'bow-string' is made from, as all the power is from the tension in the PVC arms (and, in this case, the spring).


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