2 M RES Pure S

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pures 2 m RES sailplane f3res

  • flush mount the wing screws
  • remove the metal t nuts , actually this kit just had nuts.
  • ballast tube, a great feature more should consider
  • round the fuselage edges
  • clean up the pod to boom transition
  • remove canopy latch at rear, add magnets
  • add a slideable tow hook

On to the Build

Unbelievably well done kit, and Documentation, 1st post at top, scroll down for further , most recent Pictures

plywood sheets and balsa sheets, nothing came loose and as I would later discover the tabs holding the ply pieces in where stubborn to cut free , especially where they are at the bottom of some feet on the ribs. Remember these feet are used for the build 🙂
Balsa trailing edges were loose at the top

Sorting, and cutting out the Parts

100’s of pieces and pop outs,, the gaps in the balsa where easily cut thru with a single edge razor blade, the plywood required cutting thru from both side.
the trailing edges are cut at the ends and notched, one at the center panel and 1 each at the mid panels, the tip panels need the bevel sanded in
the nose block is 4 8mm pieces, I’ll check and see If the LiFe fits into the cutout
there’s two servo trays included, I will use the one without the cutouts, and mod to suit the KST servos
I cut the tip panel spars to length, didn’t see any reference to length, so cut them a little strong, and will trim up later
mid panel spars, stronger then tip spars, and cut to length
some of the ply in the pod, will clean up the notches and slots before gluing.
wing mount cross pieces, and slots they set in
stab set, they are marked left and right and the tube slots are offset to correspond to the holes in the boom
here you can see the left and right markings, the slots will need to be opened up in the boom to allow the push rod tubes to come thru
stab caps cut to fit
ply root caps, yes there’s a left and right here as well
stab tubes to long, will cut to length before install
cleaned up the ribs at the top, the feet, and the holes where the spars pass thru.
The feet are fragile, so take care with them, an particular as some of the thin ply feet, have the retainer notch at the narrow section of the foot(bottom). The cutter would be well served to cut the feet completely and have the sheet retainer notches elsewhere 🙂

I am beginning to imagine a couple color coats on the fuse pod, with some clear sprayed over as a Topcoat


Left over center panel CF tube, may work well as a ballast tube
placed here between the two bulkheads, is there clearance for the servos, what about the tow hook and the bolts for the wing
stabs with 3 MM cf tube in place
end pieces get added and are cross grain
used titebond to glue the end caps in place
the glue smudge should clean up with some sanding
tip panel caps are thin ply, I will shape the holes to suit the sweep of the edge later
2 mm pushrod sheathing, and wire push rod inside
fuselage sides with ply doubler
fuselage pieces cleaned up, and glued together, fuse formers will be added once servo tray and ballast tube is configured
these are the pieces that cross between the fuse sides, as well as the nut that picks up the wing mount bolts.
fuse ply doubblers and balsa side panels
the tube exit slots were cut 1 mm wide, and needed to be opened up, and perhaps get lengthened to suit the 2 mm or so OD pushrods

Fuselage and the Detail

crosspieces and rings, turns out these rings get used in the wings, and the doubblers for crosspieces are elsewhere
wing hold downs, the doubblers that capture the nuts need to be rotated correctly to provide clearance in the mating slots at the top of the fuse side doubbler
corner fillets, arrange flush and glue to the edge of the fuse sides
toe hook arrangement, these are 2.5 mm tow hooks, too much or won’t bend, that is the question
I bent up some tow hooks from 1.5 mm MW, to lite I reckon
the 2.5 mm hook
won’t need all this, decisions decisions
key set
upper fuse side doubblers that form the wing saddle, as well as pick up the crosspieces for mounting the wings
hatch detail, magnets it the rear will be a good alternative over the slider
16 Degree angle tip to mid panel
10 degree angle mid panel to center panel.
ply doubbler at upper edge wing saddle
looking great, the 4 mm x 4mm balsa fillets in the corners are not cut square, I cleaned them up a bit and then fit them flush with the edges of the balsa fuselage sides.

top and bottom fillets in place, up next the ply doublers at the wing saddle
some clamps with backing on the balsa side
the basic setup with the forward jig when setting the boom to the pod
aft jig, not notch at base and there’s one on the back side, to align this over a straight line
I remove about a centimeter off the forward end of the boom, need the space for a ballast tube, and yes the tube conforms to the length given on the plans
underside of ballast tube, fits up against aft bulkhead, will be removable in case access to the top side of the tow hook is needed
from cg back to former I measure 7.3 cm, that gives me 14.6 cm ballast capacity if over the median CG as shown on the plans
forward end of tube, I will cut to length, to fit between the bulkheads
lead slugs
ballast tube, and lead CG location shown in blue ink, on lower corner fillet
yes, the tube will be removable, wire retainer at leading edge perhaps:)

Wing Mid Panel Set UP

I previously found sorted and cleaned up the left and right mid panel ribs
a couple ply ribs are used on the inboard end as they pick up the joiner rod
pins are used to accurately locate the CF tubes end to end and fore aft
feet are also cleaned up a bit to clean away the little balsa nib left behind from the sheets
i like to lightly scuff, and then wipe the cf tubes
take care and set up the ribs, so they get fed onto the tubes correctly, try and push at the center where the holes are
once they are all on focus on spreading them over the length of the tube
right mid panel ribs
more or less in approximate location
the rib combs work nicely to adjust the pitch between the ribs, though location for the set still needs adjusting
there’s also some dashed guidelines on the plans , parallel to the spar which I will use to locate the combs
placing the 2.5 MM leading edge rod will confirm that all ribs are in order
nice and clean panel, do not glue root ribs until later , as they get set to an angle with the gauges, and care should be taken there as the set of 3 panels for each wing are in a line, and the roots should be set perpendicular to the spar

glue the roots in last, and use the correct gauges
i trimmed he base of the gauge, and set it in between the two panels
remember to keep the panels down with some weights as you do your gluing, watch for pins as well so they don’t get under a foot somewhere 🙂
I remove both panels off the board in order to remove the feet and fit the trailing edge
both panels line up nicely
should be good to go
the trailing edges taper towards the outer end, and must be sanded down to suit the height of the ribs at the aft end
set and glued in place, the panel was placed back on the plans, helps to leave the locating pins in from the previous step

some more fuselage, tite squeeze

I removed some material from the two outer nose pieces to get some extra width in the cavity for the battery
just an option at this point, perhaps I will need some lead as well
an option for the receiver, end plug in seems best, 4 channel surely would get more room
servo mount layout, nice that the blank mount is included in the kit
the forward bulkhead also needed some work to clear the battery
and the top fuse side rails, needed some thinning to squeeze the battery thru
Jr receiver down in place
this would be another option for receiver placement

Tip Panels

tip panel ribs get laid out in the same fashion as the mid panel, the inner rib will get set at 8 Degrees later
right tip set
getting the ribs in order
tip up against mid panel
feet stash

More Wing, and a mystery

rudder vator caps at the root end, it exactly clear in the documents, but I see some remblence of those in the pictures
mid to center panel join, the tubes are glued in first, I set the spars over a straight line and use a jig to confirm the height
a little clean up with a long block at the roots gets a better fit
there’s clearance hear for the larger phillips head screws
the lower center panel sheet with the access door and the back stop on one side
mid to tip panel join, needs some clean up
a block and a shim for height confirmation
center panel mid ribs, and doublers for spoiler servo screws
spacer at screw
lower sheeting 3 pieces, kept the text up, one side so it can be hidden, and the front edge of the opening over the spar. some trimming is needed to fit it
column extended to underside of mount for ward m5 screw
cleaned up where the sheeting meets the spaces at the LE
diagonal braces at root centers, will surely keep the ultracote tight
stops on underside of window will keep the door from falling thru
ready to be glued in place, find tite bond works good with the plywood ribs
tools I use for applying medium CA as well as tite bond
lower center sheeting glued and weighted
jig for sitting panel angle heights, this will make one the same as the other. a little math worked well for the heights
one side tip panel the other for the mid, try to place then square in a couple planes as well
adding gussets, not flat to the underside, but up about 1/16 because i like it that way

On this Day

left tip panel join, sanded the trailing edge down a lot before hand
mid panel fit, epoxied in the joiner rod
colors colors, I’m liking violet tip and partial mid, some yellow and violet center Panel
servo arms for spoilers
glue
epoxied tip panel join
the servo arms wrapped and glued
guide pins get added at the mid to center panel join
and some doublers, waiting for the glue to dry
here are the doublers, long set epoxy, watch it though if it wicks thru 🙂
servo tray and a couple formers get placed and glued into fuse side
addd a notch to the front end of the ballast tube
and a retainer
tow hook get up
always flat on the board
this should clean up later
one set of wings 176.2 Grams
the other 175,7 Huum 🙂
these should work
lower plate will be flush or so to get at the nut

Up Next

adding one of the formers, keeping things straight
aft pod former set
the wing hold downs need to be in place, but loose
canopy frame, not happy with what the kit suggests with that little peg
canopy frame, and sheeting will add a lengthwise edge to the sheet later
sheeting glued and weighed down to the frame
nose blocks, hollowed out for the LiFe
time spent here keeping the pod straight will pay dividents later
square hardwood blocks come in handy for setting the pod together
magnet system at rear of canopy
both fuses, one a little more complete
lower sheeting will get done after I add the tow hook block, and get the wing mounts set and glued
recess in canopy aft sheet to get at and remove canopy
tail surface, there is a left and a right
nose block after some clean up
getting the canopy frame in place, and adding a couple of spreaders
shavings removed from the nose block
battery fits in snug as viewed from the underside
battery forward , will this balance or will I need lead
FwiW , light fuselage
clean at fuse wing intersection
flush wing mounting bolts
big plane 🙂
and another table top shot, pass the pepper please

Weekend Hot

aft canopy and magnet hold down
magnet gets glued under aft deck
canopy edge
edge will sand out much nicer the cross grain sheet
a little CA and CF at boom rear former connection
pieces
plane with no covering or Paint
spoiler, there are a couple spots for magnets
aft canopy and finger relief
JR receiver leads
JR receiver and battery in place
I will add some tube guides to retain the antenna ends
there’s plenty of room
battery up in the nose
underside of servo tray
stab set
rudder vators,
just some more clean up needed

Off to Paint as well as Hi Start Flags

Home stretch, covering

3 bays violet at the mid panel
vacuumed, and tacked, dust free
tip panel underside
both panels underside covered
a needed a shoe o get into the corners at the spoiler opening as well as the access cover
half hard aluminum, and a few bends
added to a spare shoe I have, cleaned the edges as well so as to not mark the covering
corners of access opening
trimmed flush, will repeat for spoiler opening
spoiler opening
attached to edge
🙂
spoiler cleaned up with clearance for opening
like the colors
next up Balance
center panel
5 bays yellow
still need to open the mounting holes

One last Picture, and then onto the Model A

tip panel weights covered ready to go

Ok, back to the model A, it’s red and white

spoiler top and bottom red as well as spoiler servo cover
center panel red, I will trim to the exact length later, that way I’m not cutting extra covering at the wing roots
right tip panel, full white lite mid, and all red tip, typical ultracote, white hard to peel backing, red much easier, straight ends and TE, with leftover to pull at the Leading Edge
stab set, white opaque, lower first then upper
irons down real nice
4 pieces
lower side first
cut the covering where the horns fit in on the top side
edges sealed, and run the iron along the ribs, full shrink after top covering in place, edge shrink to suit overlap of top sheet white first red second, I believe the red sticks better then the white 🙂

More covering and last minute Details

center panel red on underside
tip panel ultracote lite white
top side white then red
slow and steady, around the edges a few times, then fully down
tip panel weight reference
tip panel socks
spoiler opening inside corners
all together just to have a look
again
each scale to their own, this one has both tips at 103 G
center panel, no spoiler
lead under and over battery

Info only other Planes and Stuff

nice red yellow

2 cell 500 mah LiFe

KST x08 HV in the fuselage

D47 for the wing.

Battery

Li Fe Dimension (LxWxH): 51.7×18.2×18.9mm Net Weight: 30g

Update

  • ballast tube
  • LiFe
  • Huum

Servos of choice all around

and they work with a 2 cell LiFe

D47 servos

rudder, elevator,  spoilers   

Length:0.67 in (17.0 mm)
Width:0.32 in (8.0 mm)
Height:0.87 in (22.0 mm)

Technical Specifications:

Dimensions: 17 x 8 x 22mm
Torque: 20 oz-in  (1.44 kg-cm)
Weight: 0.17 oz (4.7g) 
Voltage range: 3.6 – 7.4 Volt
Speed: 0.14 sec/60°
Gear Type: Plastic
Servo: HV, Analog
Description: Competition




Rudder and Stab or V-Tail Servos

and a Few Colors! Planes from others, Thanks

 
Neon, flourescent yellow, and Purple Lite perhaps

s lite vtail
sli2-001

More on Servos

D47 servos

rudder, elevator      (1.44 kg-cm)

Length:0.67 in (17.0 mm)
Width:0.32 in (8.0 mm)
Height:0.87 in (22.0 mm)


Rudder and Stab or V-Tail Servos

 

KST X08H     V5 HV Servo

Servo TypeDigital
Gear TypeMetal
Stall Torque2.8Kg.cm@8.4V, 2.2Kg.cm@6V, 1.4Kg.cm@3.8V
Speed.09sec/60°@6V, .15sec/60°@6V, .18sec/60°@3.8V
Voltage Rating3.8V to 8.4V, Working Frequency: 1520us/333Hz, 900us-2100us, 7mm coreless motor
Dimensions23.5 mm wide x 8 mm thick x 16.8 mm high
Weight8.4 g / 0.30 oz

KST X08   V5 HV Servo

Servo TypeDigital
Gear TypeMetal
Stall Torque2.8Kg.cm@8.4V, 2.2Kg.cm@6V, 1.4Kg.cm@3.8V
Speed.09sec/60°@6V, .15sec/60°@6V, .18sec/60°@3.8V
Voltage Rating3.8V to 8.4V, Working Frequency: 1520us/333Hz, 900us-2100us, 7mm coreless motor
Dimensions23.5 mm wide x 8 mm thick x 16.8 mm high
Weight8.4 g / 0.30 oz

Spoiler

KST X08 V5 HV Servo –

 


EMAX ES9051        Spoiler servos

19,7 x 8,4 x 23 mm

0,8 kg.cm                    4.1 G


EMAX ES08A II       tail surfaces


Colors,  red , yellow, violet.

Perhaps some Ultrakote Lite, or not!  will have to see with respect to that.

Ultrakote Lite on the fuse pod, or a coat of white paint and sand and some clear top coat.

I like the Paint option , myself.

V Tail Pushrod termination, strings and springs another option

term option