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  #11  
Old 02-08-2018, 06:16 PM
WRE's Avatar
WRE WRE is offline
fly'em 'til they don't come back
 
Join Date: Jun 2011
Location: Milwaukee, WI
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Default Wi-roc / WrE / 2018 / BAFFLE

WI-ROC It's Baffling
I decided to do another experiment on this here rocket:
Build and install a deployment Baffle.
A well designed baffle will improve parachute deployment and definitely add to the life of the chute and THE JOLLY LOGIC CHUTE RELEASE that I want to use on the rocket. It's a little bit more weight. But I'm not concerned about weight . As long as it's stable, and it will be, this rocket could actually be used to load a J motor and go for level 2. So I made the baffle out of 1/8 inch plywood, 3 half pipe panels rotated 120 degrees, and spaced 1 inch apart spiral mounted inside a joiner tube (epoxy) attached to the end of the motor mount tube (epoxy again). I had to split the bottom 30 X 2.6 inch body tube to make sure the baffle and motor tube assembly was properly placed. Now I have a new experiment in mind about strengthening that seam....and everything else on the air frame. LOC included a generous nylon shock cord which will play a primary roll in the baffle system. I attached a BIG swivel also from LOC . Probably too big but again a little weight for a good spin. and it looks real nice at the end of that shock cord.

Next:
Low Resin Rendezvous

WI-ROC ON!!
Walt
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Last edited by WRE : 02-11-2018 at 04:36 PM.
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  #12  
Old 02-08-2018, 06:41 PM
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WRE WRE is offline
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Default Wi-ROC / WrE / 2018 / AFT END

A couple more pictures to illustrate progress on WI-ROC.
A picture's worth at least a thousand words.
Here's probably a half million.

Split Body Tube

Seam after joining
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Last edited by WRE : 02-11-2018 at 04:36 PM.
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  #13  
Old 02-11-2018, 03:40 PM
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WRE WRE is offline
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Default WI-ROC / WrE / 2018 / TOP END

Here's some shots of the TOP END of WI-ROC

The BULK HEAD w/ eye screw
One of the NYLON SET SCREWS that secures
the UPPER PAYLOAD SECTION[ to the TUBE CONNECTOR with
BULKHEAD]

I intend to use the WI-ROC to lift a variety of payloads with a variety of motors.
This is the original 15 inch PAYLOAD SECTION that came with the stock kit.
The NOSECONE
is also held in place with nylon screws. Both ends can be opened for payload access.
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Last edited by WRE : 02-11-2018 at 11:00 PM.
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  #14  
Old 02-11-2018, 04:32 PM
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WRE WRE is offline
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Default WI-ROC / WrE / 2018 Electonics Bay

This is the LOC PRECISION ELECTRONICS BAY

It's a connector between the UPPER and LOWER SEGMENTS of WI-ROC> that has a flat ELECTRONICS SLED sled inside to which an ALTIMETER and BATTERY are attached.
More on that later. I hope to do some experiments with DUAL DEPLOYMENT using this ELECTRONICS BAY

The BULK HEADS are held together with wing nuts securing 1/8 inch threaded rods that run through the ELECTRONICS BAY

At this point the ELECTRONICS BAY is incomplete, as you can tell by all of these leftover nuts and washers.. I'll get around to those later, or maybe not.
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Last edited by WRE : 02-11-2018 at 11:01 PM.
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  #15  
Old 02-11-2018, 06:58 PM
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WRE WRE is offline
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Quote:
Originally Posted by Rex R
bamboo skewers work well for applying adhesives and have a longer reach.
Rex
p.s.
looking good so far

Thanx Rex
I like that bamboo stick idea.
I buy them at the $1 Store.
always handy.
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  #16  
Old 02-11-2018, 11:53 PM
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WRE WRE is offline
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Default WI-ROC / WrE / 2018 / NYLO-GLAS

A long time ago I read about using nylon stockings as the fiber in fiber glas.
Not sure if that's technically fiber glass, more like Nylo-Glas. That's what I'm calling it NYLO- GLAS
So ,Step#1 --sand the shine off the glassine top layer of the tubes. This promotes good adhesion of the nylon to the paper below.I used a couple different sponge sanders. the roughest was 80 the smoothest was 150.
Step #2 -- pull nylon stocking over tube and tie knot in both ends. The nylon was stretched slightly so that it had good contact with the tube. The end knots hold the tension. Nylon is a pretty fine mesh but it's not as absorbent as fiber glass cloth. The cylindrical nature of the nylon stocking is a great advantage in even distribution around the air frame.
Step #3 --Both of the original tubes ready for the resin. I also made another 30 inch length of NYLO-REZ enforced LOC 2.6 inch diameter tube. This was cut in half to make two additional 15 inch PAYLOAD SECTIONS.
I chose ZAP Z- POXY Finish Resin to bond the nylon to the paper. I don't know if there's something better. This was the brand available at the hobby store just west of here. It has a 40 minute cure time. It leveled itself real well, and did not run excessively. I made an effort to keep the resin coat thin and even. Applied with brush. Relatively low viscosity.
It seems to have worked perfectly in this case. Had to sand the NYLO-GLAS smooth, as it had lots of little irregularities. Still needs primer but no can do in WI WEATHER.

At this point, the finish while rough is strong as hell. and mostly water proof. I'll settle for that.The NYLO-GLAS added about 3-4 ounces of weight to the air frame. Not bad at all.
Stay tuned for further adventures coming soon.
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Last edited by WRE : 02-13-2018 at 07:52 AM.
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  #17  
Old 02-12-2018, 02:45 PM
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DANLK66 DANLK66 is offline
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Default

Just a reminder that I have the e-bay bands for those of you that have purchased the e-bay during the tour of LOC. I will have them at the meeting this month and will try and get them to launches if anyone needs them. Let me know.

I think there are a few extra nuts and bolts that were sent along Walt so don't be to concerned if you end up with extra.

Dan
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  #18  
Old 02-12-2018, 08:04 PM
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WRE WRE is offline
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Default WI-ROC / WrE / 2018 / Cured NYLO-GLAS finishing

After 24 hour full cure time on the Z-POXY, sanding and trimming was the main task at hand. I was happy to see that nothing warped, or swelled and that everything still fits together just fine. At this point the weight of the air frame, the fins (still unfinished) and nose cone is: 1 pound 10.4 ounces or 750 grams. I am glad to see that ( without a parachute and motor ) the WI-ROC is still under 2 pounds.
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  #19  
Old 02-13-2018, 06:44 AM
ECayemberg ECayemberg is offline
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Looking good, Walt!!!! You're rockin' it!!!

I need to post an update of progress on my WI-Roc....

-Eric-
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  #20  
Old 02-13-2018, 11:25 PM
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WRE WRE is offline
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Default WI-ROC / WrE / 2018 / Misc.

Here are some Miscellaeous Pictures of related WI-ROC topics.
1st --That's a 1/10 downscale of the WI-ROC to be flown at
The MARCH MADNESS MICRO-MAXX MADNESS Launch coming up 3/3/2018 at The SOD FARM
Micro WI-ROC is seen here next to full scale nose cone and body tube in primer.

2nd -- Here's a picture of the bamboo skewers that Rex R. was talking about a while ago.
Rex is right ! They are really handy for spreading glue and resin. and if you ever want to make tempura, they're a must.

3rd -- We went down to NIRCON 2018 in Woodstock, Il. Rocket Master Bob Kaplow gave a demo on cutting centering rings and bulkheads. I followed Bob's lead, and made a batch of plywood cookies. Shown BEFORE & AFTER the Great Epoxy Flood.

COMING UP----
I have a new experiment in mind. :
....Strong to the Finish,
'cause I eats me spinach
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