MegaTech R/C Real World Helicopter Series Bedienungsanleitung PDF herunterladen (Seite 56)

Igl Most cowl and wheel-pant halves have molded-in lips that mate

^"^ with each other; this provides a gluing surface for the parts. (If

your parts have molded-in lips, skip to step 6.) Some parts, however,

are trimmed at the factory and do not have a lip for the mating half.

Don't despair; you can easily add a lip using strips of styrene. Many

hobby shops have sheets of styrene plastic for scratch builders; I use

sheets that are 0.030 thick. This provides plenty of strength yet is

flexible enough to be molded to the shape needed. For cowls, I cut

%-inch-wide strips; for wheel pants, I use 1/2-inch-wide strips.

Using small

spring clamps,

test-fit the plas-

tic strips to the

inside of the

cowl and note

where you'll

need to bend the

plastic to con-

form to any

curves. Do the

same for the

wheel pants.

Using your fin-

gers, gently bend the plastic to the curve needed; you'll be relieving the

tension in the plastic strips when they are glued into place.

Now glue the strips

into one of the cowl

halves and a wheel

pant, and use plenty

of spring clamps. For

glue, I usually use

Oatey Clear PVC

Cement (you can also

use thin CA); it slightly

dissolves the plastic

and when the cement

dries, the parts will

be firmly welded

together. Let the

cement cure

overnight.

After the glue has set, remove the clamps and check the lip for

any glue residue that needs to be removed, and then test-fit the

parts together. Because of the wheel pant's curves, you'll most likely

need to trim the lip so the halves can easily fit together. Remember,

take your time so you achieve the best possible fit. The cowl should

not require much trimming. When you've finished, the parts should

again fit together easily.

Here's a tip: before you glue the halves together, take a razor blade or

a hobby knife with a no. 11 blade and put a slight radius on the inside

corner of the mating part. By removing this edge, you allow the parts

to fit together more tightly. You'll end up with a more closely fitting

seam that requires less filler.

Now glue

the cowl

and wheel-pant

halves together.

I again use Oatey

PVC Cement and

plenty of tape,

rubber bands,

or clamps to

hold the parts

together. Here are

the cowl and

wheel pant glued

together and

ready for

reinforcement

and seam work.

Use 60-grit sandpaper to block-sand and remove any high spots, and

then blend the seams together. As you sand, you'll notice some shiny

spots; these are low spots that you'll need to fill with putty. Don't

worry about any scratches; they'll be filled in with putty and primer

later. Now block-sand and further smooth the seams with 150-grit

sandpaper to remove most of the scratches. It's a good idea to wear a

mask when you're sanding so you don't inhale the dust. Now is a good

time to cut out the openings in the cowl and wheel pant (you'll need

access to the inside of the pant for the next step). Use a rotary tool

with a cutting bit to rough out the openings, and then use a file or

sandpaper to final-shape the openings.

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