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  1. #31
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
    Posts
    5,708
    I finally got enough of the pieces to build my Jawstand Launch Pad. The Current configuration is a 6' x 20mm Mini Button Rail with a 5' x15mm Makerbeam Micro button rail. Eventually I will add a 6' 1010 Rail to the pad. Blast Deflector is a $1.99 Dewalt metal cutting blade that with a little grinding on the arbor hole now fits perfectly around the 20mm rail. The 2x4 is temporary until I get the 1010 rail and the parts I want to mount it, then the 20mm rail will be fitted with 1010 rail buttons and changing the rail will be as easy as slipping the 20mm on to the 1010 just like the 15mm is currently mounted to the 20mm rail, there are stop screws top and bottom to keep the 15mm rail from sliding out of the 20mm rail if a rocket were to hang up for some reason. The way the rails are set up now I can fly Micro buttons off one side and Mini buttons off the other. I will be bringing this pad with me for use at our future launches.

    Parts purchased from:

    Rail-buttons.com for all my rail buttons needs Randy has great service.

    80/20 Inc 20mm t-slot 1825mm long via Amazon ( $28.00 of which half was shipping)

    Makerbeam B.V. (via Amazon) 15mm rail x 1500mm length ($25.00 for two iirc)

    Richland Griggs Ace Hardware and the pieces/parts Hillman Fasteners section (who knows how much I spend there, they have screws from smaller than #2 and larger, dig around long enough and I can do anything in rocketry there...almost).

    Lowes for the Aluminum 1"x1"x36" angle and the blast deflector/blade ( $12.00).

    Click image for larger version. 

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    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  2. #32
    Join Date
    1st July 2015
    Location
    British Columbia Canada
    Posts
    75
    How big of a rocket do you think that pad could handle


  3. #33
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
    Posts
    5,708
    Quote Originally Posted by highflyer1968 View Post
    How big of a rocket do you think that pad could handle
    Staked down, and with a different interface than the 2x4 wood probably 10lbs of HPR rocket or so. Currently it is set up for LPR and MPR rockets.
    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  4. #34
    Join Date
    1st July 2015
    Location
    British Columbia Canada
    Posts
    75
    Looks great

  5. #35
    Join Date
    15th May 2009
    Location
    Northern Illinois Rocket Assembly and Test Facility (NIRATF)
    Posts
    1,964
    A very simple adapter... the plate is doubled 3/4" ply, with a 1-1/2" x 1-1/2" added to stand rail further away from plate. blast deflector is steel sheet mounted on arms bent 45. The 8' 1010 rail is overkill, would have been fine (and easier to transport) with a 6 footer.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Proud member of WOOSH, FVR, IR, QCRS, (RC)2
    2013 APCP: 48,397.3 Ns (18% P)
    Highest altitude achieved: 21,981' AGL

    "Gravity is a cruel and unpredictable mistress"

  6. #36
    Join Date
    23rd November 2013
    Posts
    2,217
    SMR you method looks nice and simple but you lose a lot of rail. If you use the 2x4 attachment method shown above you can practically use the entire rail.

    I've found this to be important when trying to minimize altitude but get the rocket off rail with enough speed to be stable.

    I use Thrust Curve which allows you to change the rail/rod length so that you can optimize your motor selection, be it minimizing or maximizing altitude.

  7. #37
    Join Date
    15th May 2009
    Location
    Northern Illinois Rocket Assembly and Test Facility (NIRATF)
    Posts
    1,964
    Quote Originally Posted by Lowpuller View Post
    SMR you method looks nice and simple but you lose a lot of rail. If you use the 2x4 attachment method shown above you can practically use the entire rail.

    I've found this to be important when trying to minimize altitude but get the rocket off rail with enough speed to be stable.

    I use Thrust Curve which allows you to change the rail/rod length so that you can optimize your motor selection, be it minimizing or maximizing altitude.
    Nah, its just not a very good picture. Here I blew it up and tried to enhance the settings to bring out detail. Not much better. I do use the whole rail. Note the rail stop, which is at the very bottom of the rail. The rail itself is on a standoff, the width of the rail, which moves it away from the attachment to the tripod, allowing the fins to clear and the rocket to slide all the way past the attachment structure. (Very similar to the 2" x 4" method.)
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Proud member of WOOSH, FVR, IR, QCRS, (RC)2
    2013 APCP: 48,397.3 Ns (18% P)
    Highest altitude achieved: 21,981' AGL

    "Gravity is a cruel and unpredictable mistress"

  8. #38
    Join Date
    23rd July 2011
    Location
    Butte, MT
    Posts
    2,267

    Let's see your Jawstand - Rail adapters

    Your launch pad looks nicely built, but it has a very narrow footprint. Be careful that side thrust as a result of the angled blast plate doesn't cause it to tip.
    Steve Shannon
    L3CC, TAP, Director, Tripoli Rocketry Association

  9. #39
    Join Date
    15th May 2009
    Location
    Northern Illinois Rocket Assembly and Test Facility (NIRATF)
    Posts
    1,964
    Quote Originally Posted by Steve Shannon View Post
    Your launch pad looks nicely built, but it has a very narrow footprint. Be careful that side thrust as a result of the angled blast plate doesn't cause it to tip.
    Yes, I agree. It is my lightweight pad, with self imposed limit on weight and impulse. I have other pads for heavier rockets.

    The Rockwell Jawstand (core topic of this thread) has another feature not often mentioned... holes in each foot allow it to be staked out.
    Proud member of WOOSH, FVR, IR, QCRS, (RC)2
    2013 APCP: 48,397.3 Ns (18% P)
    Highest altitude achieved: 21,981' AGL

    "Gravity is a cruel and unpredictable mistress"

  10. #40
    Join Date
    6th February 2015
    Posts
    681
    Yep. Staked down you won't have any problems.


  11. #41
    Join Date
    8th October 2016
    Location
    Midwest
    Posts
    129
    I just stumbled upon this thread and I have to say the Jawstand is a great idea for use as a launch platform. I like it so much that I dug around the Net and found a really decent price for one. $54.99 w/Free Shipping (FedEx SmartPost). Placed my order just before posting this. Looks like it will arrive on the 28th.

    If anyone is interested, you can find it on eBay (Here). Btw, the seller is RockwellTools who I believe is The Rockwell Tools, as in the people that make the Jawstand.

    Peace,
    Tobor.

  12. #42
    Join Date
    6th February 2015
    Posts
    681
    Great find. There's even one for $50 in the "also viewed" list. I love mine.


  13. #43
    Join Date
    8th October 2016
    Location
    Midwest
    Posts
    129
    Quote Originally Posted by CORZERO View Post
    Great find. There's even one for $50 in the "also viewed" list. I love mine.
    Yeah, the $50 one is the model 9033 which does not have the hand crank for height adjustment. But since I have (or will have) to justify this purchase, I bought the other model as it will double as a tool/helper/third hand when doing home remodeling/repair work on the side.

  14. #44
    Join Date
    8th October 2016
    Location
    Midwest
    Posts
    129

    It's Here

    My JawStand arrived today. Much quicker then eBay estimated (Nice change of pace). So here it is....

    Click image for larger version. 

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    Edit: One thing to note about seller. Although the package arrived in one piece, it was shipped using only retail box. No shipping carton was used, not even wrapped in heavy paper. Just be aware of this if you buy from RockwellTools

  15. #45
    Join Date
    6th February 2015
    Posts
    681
    Looks good. Update us when you decide on your rail configuration.


  16. #46
    Join Date
    8th October 2016
    Location
    Midwest
    Posts
    129
    Quote Originally Posted by CORZERO View Post
    Looks good. Update us when you decide on your rail configuration.
    Well, I already have my rail. It's the 1" x 97" 80/20 rail I purchased from Steiner Electric for under $25 w/Tax. Steiner has several local brick-n-mortar locations in my area so I didn't have to shell out coin for shipping.

    As to mounting the rail, my plan for now is to use a short length of 2x6 and use 3x 6.5"~8" carriage bolts through the 2x6 to attach the rail. As I wish to use the full length of the rail, My blast deflector will be mounted to the 2x6 and the rail stop anchored near the very bottom of the rail. I'll post my AutoCad drawing as soon as I finish it.

  17. #47
    Join Date
    6th February 2015
    Posts
    681
    Looking forward to it.

    I'll take better pictures of mine but right now it has worked with everything I've used it for up to G and H motor 3 inch models. I just used two 7/16" hex head bolts slid into a rail channel and mounted through pre-existing holes on one side of the clamp where one of the plastic bumpers was. Works well and is height adjustable by loosening the bolts and sliding the rail up or down.

    Blast deflector is a cake scoop thing from amazon:

    https://www.amazon.com/Wilton-2103-307-Cake-Lifter-8-inch/dp/B001BOELLI/ref=sr_1_4?ie=UTF8&qid=1503632535&sr=8-4&keywords=cake+lifter


    Here's one:

    Click image for larger version. 

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    Last edited by CORZERO; 25th August 2017 at 04:47 AM.


  18. #48
    Join Date
    8th October 2016
    Location
    Midwest
    Posts
    129
    Quote Originally Posted by CORZERO View Post
    Looking forward to it.

    I'll take better pictures of mine but right now it has worked with everything I've used it for up to G and H motor 3 inch models. I just used two 7/16" hex head bolts slid into a rail channel and mounted through pre-existing holes on one side of the clamp where one of the plastic bumpers was. Works well and is height adjustable by loosening the bolts and sliding the rail up or down.

    Blast deflector is a cake scoop thing from amazon:

    https://www.amazon.com/Wilton-2103-307-Cake-Lifter-8-inch/dp/B001BOELLI/ref=sr_1_4?ie=UTF8&qid=1503632535&sr=8-4&keywords=cake+lifter


    Here's one:

    Click image for larger version. 

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    Yeah, nice and simple. I like it! GJ.

    And thx for the link. I'll give it a look-see.

  19. #49
    Join Date
    18th October 2016
    Posts
    492
    Quote Originally Posted by Tobor View Post
    Yeah, nice and simple. I like it! GJ.

    And thx for the link. I'll give it a look-see.
    That cake scoop blast deflector works like a champ. I've used mine with up to an I224 with no problems.

    Click image for larger version. 

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    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  20. #50
    Join Date
    8th October 2016
    Location
    Midwest
    Posts
    129
    Here is a quick and dirty rendering of my rail mount fixture.

    Click image for larger version. 

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    And here is the hardware to make it happen.

    Click image for larger version. 

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    Edit: Here is the Rail Mount in 2D for better clarity.

    Click image for larger version. 

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  21. #51
    Join Date
    8th October 2016
    Location
    Midwest
    Posts
    129
    Update:

    Mostly finished. Still need deflector, stain and sealer.

    Click image for larger version. 

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    Works like a charm.
    I will post dimensions and parts list tomorrow.

    Edit:

    Click image for larger version. 

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    Parts List

    *(1x) 2 in. x 6 in. Kiln-Dried Heat Treated Lumber
    *(2x) 6-in x 1/4-20 Zinc-Plated Carriage Bolt
    *(2x) 1/4-in x 1-in Zinc-Plated Fender Washer
    *(2x) Hillman 1/4-20 Threaded Knob
    *(1x) 1/4-in-20 x -1/2-in Stainless Steel Hex Bolt [Rail bumper]
    *(1x) 1/4-in Stainless Steel Coupling Nut [Rail Bumper]
    *(1x) 1.5-in Metallic Corner Brace [Deflector Mount]**
    *(3x) #10-32 Stainless Steel Nylon Insert Lock Nuts [Deflector Mount]**
    *(3x) 10-32 1/2" Machine Screw [Deflector Mount]**
    *(2x) #8 x 3-in Phillips-Drive Drywall Screws [Wood Hook]**
    *(1x) Deflector, a.k.a. Cake Lift [Yet to order] "Thx Corzero for that one"

  22. #52
    Join Date
    6th February 2015
    Posts
    681
    That looks great! You will really like it. The thing is a tank.



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