I've written about the cereal box laminated fins before.
If you haven't made fins from a card stock laminate you might be surprised how strong they are.
These fins are actually a triple thickness of:
1. Printed 100 lb. card stock (one side)
2. Cereal Box cardboard
3. Printed 100 lb. card stock (the other side)
The outside printed layers of 110 lb. card stock are "butterflied" and fold over the cereal box cardboard at the leading edge.
If folded and glued correctly, this makes a rounded leading edge on the finished fin.
Trust me, it's easier to do than read through the description.
You'll need :
The fins printed on 110 lb. card stock, 220 grit sandpaper, cereal box cardboard (this is from a Cheerios box), glue stick, straightedge and a sharp hobby knife.
First, rough up the printed side of the cereal box cardboard with 220 grit sandpaper.
It won't take much, just remove some of the gloss and ink.
The glued outside layers will stick better if some of the ink is removed.
This sanded ink and fine dust can get everywhere! Dust off the cardboard and wash your hands before gluing anything.
You will need a straight long cut to be the inside leading edge of the ply fins.
With sharp knife and straightedge, cut off the crooked edge down a long side of the cereal box board.
For a rounded leading edge, lightly sand the the square cut you just made with 400 grit.
Don't over sand the edge, just knock off the corners a bit.
Friday, August 22, 2014
Other sessions are being added.
Many of the techniques from the blog are on the video.
It's always weird to hear yourself talk.
Note to self: Don't slump.
Thursday, August 21, 2014
The edges of the Estes plastic nose cone are too square and could turn the interior body tube edges in.
A simple rounding of the base edges gave an better slip fit.
The BT-5 tube was longer than the wraps.
Both ends of the tube were trimmed down, just above the printed wrap ends. The nose cone was slipped into the tubes for support when cutting.
The remaining white tube was sanded down to the wrap ends.
I know, stick to the subject -
With the nose cone inserted in the bottom, the tube makes a good single note Pan Flute.
The 7" BT-5 tube plays clear, close to an F#.
Try this next time you have to entertain the grand kids. They'll think you're a genius.
On the first floor was a small NASA space program display.
Along with plastic models of manned space vehicles there is a Mercury capsule. I had to get inside of it. The plaque states:
"This is a recreation of the actual Mercury capsule. It is constructed of plywood, chicken wire and fiberglass and is approximately 98% scale of the actual Freedom 7."
Only 98% scale? I thought the fit was a little tight.
Inside the capsule is a small TV screen where you can actually play Space Invaders.
Just like the real thing!
Wednesday, August 20, 2014
Cut out the lug wrap and do a pre-curl in the heel of your hand.
Use a small dowel or the shaft of a Q-tip.
Apply a coat of glue stick to the inside surface.
I set the lug in the middle of the wrap an rolled the sides to the top.
This lug is purposely longer than the wrap and will be sanded to the to and bottom of the wrap.
By the time I got to the other side the glue had started to set up. Another rub of glue stick and the wrap was finished.
On the left you can see some of the lug edge rolling into the middle.
Pick out and raise the edge over the top of the lug. Raise about 1/3 of the turned under edge and sand off.
Turn the lug 1/3 turn and raised the next third inside edge. Sand that off.
Work your way around the inside of the lug until all the edges are removed.
Compare the lower picture with the upper lug and you can see the rolled over edge is gone.
A turned under lug edge might get caught on a launch rod or slow down the boost speed. It should be cleaned off.
The inset picture shows the wrap seam. Like the body tube wrap the edges are almost invisible.
This lug wrap seam will be turned into the fin fillet area.
I use the brush to knock off accumulated primer sanding dust from 400 grit sandpaper.
400 grit loads up quickly, especially when you are dry sanding the first primer coat.
You can remove the dust "mud" by brushing the sandpaper under running water. You shouldn't have to brush very hard to take off most of the loaded up primer.
This brass brush is like the old suede brushes. Over time the rough sandpaper will wear down the bristles. My previous brush lasted five years.
This new brush is the WorkForce #330761, $3.19 at Home Depot.
The amount of money I save by re-using sandpaper will pay for the brush many times over.
Tuesday, August 19, 2014
The Estes Reflector is up for bidding on EBAY - CLICK HERE
The same model built was here on the blog.
Also for sale is the 1976 ESTES NARAM Contestants Package.
Check out the listing - CLICK HERE
This is the vinyl case that holds all the literature.
Included are an Emergency Repair Kit (complete with dried out glue packet but minus the igniters)
MINT 1976 Catalog
Unopened Altitude Computer
Four sets of two fabric stickers
Model Rocket Data Sheet
There are many more pieces than are shown here,
Most everything is MINT, there are some folded corners.
Technical Notes 1 - 5, blank order forms and more!
Stop by and make a bid!