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adhesive works very well here, eliminating the need
for pins. If you've taken your time and fitted these
pieces in place with a minimum of gaps, all that re-
mains is sanding to shape.

20. Use your sanding block and coarse paper to now

bevel the inside ends of the spruce fuselage
framework at the tailpost—see Top View of plans.
Once satisfied, careful ly epoxy these ends together,
providing equal bends to each side of the fuselage

when viewed from the top. Also view the structure
from the rear making sure everything is square.
When satisfied, clamp securely and allow to cure.
Accurately cut five (5) pairs of top and bottom 1/4" sq.
spruce cross braces which will correspond, in loca-
tion, to the exposed uprights. We suggest cutting
these pieces at the same time, taking care to ensure
that they are of equal length. With the tailpost joint
fully cured, glue cross braces in place, working from
the front to the back. Check each cross brace in-

stallation as you go, making sure the structure stays
square.

21. The complete fuselage, including the exposed

spruce framework should now be given a complete
sanding. Any gaps, nicks or dings should be filled
and sanded-off. Remove the two F-10 (ply) pushrod
guides from their die-cut sheets. Use your sanding
block to clean-up their edges and the slot. Once
satisfied, glue F-10's in place to the outside of the
vertical uprights, beneath the stabilizer location.
The last thing to do is to make the cut-outs for the
cockpit locations for your "pilots". At this point, you
can choose to make the model a one or two "holer."

With the exception of the cabane struts and some
other details which will follow, your fuselage is com-
plete.

WIRE PARTS ASSEMBLY

I. LANDING GEAR

The pre-bent front and rear 1/8" dia. M.W. landing gear
(L/G) forms must be joined together at the bottom,

towards the wheels. We recommend soft copper wire for
firmly and neatly wrapping the two pieces together prior
to soldering. We would highly recommend the use of
HARRIS'S STAY-CLEAN FLUX and their silver solder for

this operation. Although a soldering iron will work, with

patience, these joints can be quickly and permanently

made with the use of a small hobby-type gas torch.

1 . Locate the position of the rear "cross-axle" wire to

the bottom rear ply L/G plate on the fuselage bottom.

While holding the wire in place, slip the two formed

metal clips onto the wire. Use a pencil to mark the
hole locations of these clips onto the ply base, then
remove the wire and clips. Drill shallow, small-

diameter "guide holes" for the clip's #2 x 3/8"
screws. Now attach the landing gear wire to the

fuselage with the clips and screws— do not over-
tighten. Repeat this process with the forward lan-
ding gear wire.

2 . Pull the two wire parts togetheruntiltheytouch.The

two short bent 'arms' on the forward leg should line-
up with the legs of the rear L/G wire. If needed, use
pliers to adjust these arms until they fit neatly and
uniformly.

3 . Use soft copper wire to now neatly wrap the forward

short arms to the rear L/G wire as shown in the il-

lustration in the plans. Apply some STAY-CLEAN

flux to the joint and solder. Repeat the process on

the opposite side. Be neat and try to be sure that the
joint is sol id without a lot of excess solder. Once the

joint has been made, clean with water to remove all

flux and dry-off with a paper towel.

4 . As shown, the crossed-axle landing gear system

derives its ability to accept landing loads and shock
from the two independent axle legs. These need to

be joined at two points, each 2-1/2" in from the wheels.

This distance has shown very good shock-absorbing

abilityforEIderBiplanesweighing 7-1/2 to8-1/2 Ibs.Join
these axles by first measuring the 2-1/2" distance re-
quired, wrapping with soft wire (about 1/2") and
soldering. Again, clean the solder joints completely

with water and dry.

12

Содержание Elder Biplane RC-37

Страница 1: ...breath taking without the fear of losing aileron authority Land ingsand take offsareabsolutelyeffortless In theairyour Elder Biplane is fully capable of some of the most realistic aerobatics you ve e...

Страница 2: ...d should provide you with excellent fit Die cut parts should be carefully removed from their sheets by first lightly sanding the back of each sheet of parts and then carefully removing each part Use a...

Страница 3: ...ote grain direction of these pieces Measure cut and glue in place the 3 8 x 1 2 upper leading edge Glue one of the W 11 ply dihedral braces in place against the inside surface of the leading edge be s...

Страница 4: ...for location and placement of the nylon mini horns used for attachment of the interplane struts On the upper wing the location of these horns is shown on the lower left side of plan sheet 5 Route or c...

Страница 5: ...ard of the outer ones note tick marks on plans The two remaining W 1A s are now glued in place at the center of the structure spaced 1 4 apart to allow later dowel insertion As shown the main dihedral...

Страница 6: ...there is a right and a left aileron drive assembly Hold one of these assemblies it makes no difference which one in place to the trailing edge W 14A assembly in it s proper location Apply glue to the...

Страница 7: ...ed slightly so as not to in terfere with the placement of the main dihedral brace Glue W 5 s in place Glue all of the wingtip braces W 7 W 8 W 9 W 10 and W 15 in place on the W 6 wingtips Note that W...

Страница 8: ...The Elder Biplane relies a great deal on the strength of its frame take the time to make each and every joint required fit as precisely as possible Also note that the uprights and cross braces are a m...

Страница 9: ...3 hour type to give you the time to ensure that the structure thus far is truly square While waiting for the glue to cure measure and cut the six required identical lengths of 1 4 x 1 2 balsa top and...

Страница 10: ...wer wing s center section in place in the F 5 wing saddle The bottom rear of the fuselage is now sheeted from the trailing edge of the center section back to the point shown on the plans The top of th...

Страница 11: ...plans Locate and remove formers F 1 and F 2 from theirdie cut sheet Observe how F 2 sits in place when attached to the three 1 4 sq pieces extending out from the cowl Viewed from the side and top F 2...

Страница 12: ...om towards the wheels We recommend soft copper wire for firmly and neatly wrapping the two pieces together prior to soldering We would highly recommend the use of HARRIS SSTAY CLEANFLUXandtheirsilvers...

Страница 13: ...rear of the fuselage at the cross brace just behind D D Use tape to now locate the pre bent skid support to the bottom rear fuselage location shown Use soft copper wire to neatly wrap the support wir...

Страница 14: ...wrap the top forward leg of the brace to the top forward end of the front strut a bit of tape can be used to hold the bottom rear end of the brace in place while you re working with soft copper wire...

Страница 15: ...e that the top wing is centered disregard any wing low condition for now and ad just as needed to achieve this condition The last observation to make is the relationship of the tops of the wire cabane...

Страница 16: ...en applying the finish be sure that all of the exposed wood except the top rear stab glueing area receives paint We then used flat black paint again epoxy is great to paint each of the ply joint caps...

Страница 17: ...tailing the model with a few goodies We have used a few items that were off the shelf in most well stocked hobby shops Williams Bros makes some nice 2 1 2 scale machine gun kits which would work well...

Страница 18: ...wn 1 3 4 total AILERONS 3 8 up 3 8 down 3 4 total CAUTION After adjustment of your servos be sure to reinstall the retaining screws that hold the output arms in place in your servos PRE FLIGHT INSTRUC...

Страница 19: ...Like most aircraft that use flat bottom airfoils the Elder Biplane will naturally want to climb at higher throttle settings and settle at low throt tle A point somewhere in between these two throttle...

Страница 20: ...150029...

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