Paritech ASH 31 Mi User manual
Author: Per Takman
E-mail: per.takman@gmail.com
Paritech ASH 31 Mi – Build Log
Contents
2014-05-30 Placing the order.................................................................................................................. 2
2014-09-25 Unpacking ............................................................................................................................ 5
2014-09-27 Servo connectors between inner wings and fuselage ......................................................... 9
2014-10-05 Installation of supports inside fuselage............................................................................. 14
2014-10-11 Wheel brake and tow release servo .................................................................................. 17
2014-10-12 Outer wings servo connectors ........................................................................................... 19
2014-10-18 Wings servos ...................................................................................................................... 20
2014-10-25 Elevator servo and cable routing inside fuselage .............................................................. 22
2014-10-29 Radio setup & servo travel adjustments............................................................................ 28
2014-11-13 Receiver and motor battery connectors and installation.................................................. 33
2014-11-15 Attaching decals................................................................................................................. 34
2014-11-16 Center of gravity and lateral balancing.............................................................................. 37
Revision 1
2
2014-05-30 Placing the order
Today I placed my order for an ASH 31 Mi from Paritech!
http://www.paritech.de/modellbau/ash31.php
The first time I laid my eyes on this model was in July 2012 at the Segelflugmesse in Schwabmünchen
after returning from a fantastic glider trip to the Swiss/French Alps with a friend. I was captured not
only by the looks of this ship, but also by the maneuverability displayed by the pilots that were
showing it off to the audience.
Manufacturer
Paritech
Unit
Wing span
7000
[mm]
Elevator span
1000
[mm]
Length
2350
[mm]
Wing area
160
[dm2]
Weight
19122
[g]
Wing loading
115.4
[g/dm2]
Aerofoil
MH 32 / 14%, 1000 mm from root 11%
Scale
1:3
[1]
Table 1. Paritech ASH 31 Mi specifications.
My previous experience with Paritech is from purchasing an ASH 26 which I’ve flown extensively ever
since the maiden flight in early spring 2011 (https://www.youtube.com/watch?v=b0FpHu54f18). The
build quality of this plane and the in-flight performance has convinced me that Matthias Paul and
Uwe Rihm know their stuff.
After a long period of window shopping and planning of this project I finally pulled the trigger and
placed an order for a “no expense spared” ASH 31 Mi. Having seen how well Paritech assemble their
gliders I could not resist letting them assembling retracts, canopy, cockpit, AFT19XS, spoilers and
rudder.
The purpose of this build log is to provide some ideas of how to assemble this glider.
Revision 1
3
Table 2 below summarize my order from Paritech and contain some of the accessories installed.
Paritech part number
Description
21000
ASH 31 Bausatz /ASH 31 Kit with wing bags
Im Bausatz enthalten:
-> Alle GfK- Teile, montagefertig, RAL 9003
-> Kabinenhaube u. Beschlagteile
-> Anlenkungskleinteile
-> Flügelverbinder
-> Gfk Cockpit
-> Flügelschutztaschen
ohne RC u. Antriebskomponenten!
Weitere Informationen unter www.paritech.de
799990967
ASH 31 Dekorsatz
Dekor in grau,rot, oder blau. Bitte bei der Bestellung
Wunschkennung angeben!!!
19800
ASH 31 Kabelsatz Flügel mit Hochstromstecker / cables for wings
and High power connector
Kompletter Kabelsatz
Aus zertifizierter Fertigung,
Top Qualität von Powerbox Systems
799990962
ASH 31 Scale Instrumente M 1:3 Set 10tlg.
scale instruments from Axel Pfannmüller
1x Panel,
1x Steuerknüppel,
1x Mikrophon,
1x Kartentasche,
1x Fussrastenverstellung,
1x Schleppkupplungshaken,
1x Fahrwerkshebel,
1x Bremsklappenhebel,
1x Wölbklappenhebel,
1x Cockpitsymbolbilder
21078
ASH 31 Schutztasche Rumpf / fuselage protection bag
Hochwertige Rumpfschutztasche,
alubedampfte Luftpolsterfolie, UV-beständig,
genäht, nicht verschweißt
Innenseite beflockt, mit Reißverschluss und Tragegriff
Farbe silber
Qualität aus deutscher Fertigung
19902
ASH 31 Servo Set oh. Fahrwerk
Hitec Servoset für flugfertigen Aufbau, ausgenommen Fahrwerk:
#113645 HS - 5645 MG 12 kg 2x Wölbk.innen+ 1xSR+
1xSchlepp
#113645 HS - 5245 MG 12 kg 2x Wölb außen
#112226 HS - 225 MG 4,8 kg 2x Störkl.
#113125 HS - 5125 MG 3,5 kg 4x Quer Außenflügel
#113957 HS - 7955 MG 23 kg 1x Höhe
Abb.nur Muster- zeigt nicht die modellspezifischen Servos
Revision 1
4
20473
ASH 31 Servorahmen Set kpl.
servo frames complete (Hitec 2 Paar 5645MG/ 2 Paar5245MG)
15993
ASH 31 Sitzkissen
Sitzkissen Set 3 tlg.
Material: Polstermaterial, innenliegend leichter Stützstoff
(Schaumgummi)
Farbe: kann variieren
Abb. zeigt optionale Artikel, GFK Teile nicht im Preis enthalten
20726
ASH 31 Klapptriebwerk eingebaut - inkl. Triebwerk u. Montageset-
AFT 19 XS Turbo Fa. Schambeck Luftsporttechnik, inkl
Montageset
20731
ASH 31 Cockpit Ausbau ohne Pfannmüller Intsrumente
ready installed scale cockpit
799990961
ASH 31 Fahrwerkseinbau/ready installed gear
ASG 29 Fahrwerksmontage inklusive Gasdruckdämpfer, Servo,
Spritzschutz /ready installed retract gear gas pushed
with servo
20102
ASH 31 GFK Cockpiteinbau Elektroversion mit Zugangsdeckel,
magnetisch verriegelt, für Akku
GFK Cockpit installed with door for engine batterie
799990939
ASH 31 Kabinenhaubenmontage inklusive
Gasdruckdämpfer/ready installed canopy gas pushed
incl.Klappmechanik, Lackierung, Verriegelung u. Haubenschutz
799991015
ASH 31 Schiebefenster Eingebaut inklusive Fenster/ready installed
canoby window included window
799991016
ASH 31 Schleppkupplung+ Einbau/Tow release included
installation
799991272
ASH 31 Seitenruder Montage
rudder ready installed
799990940
ASH 31 Störklappenabdeckung montiert/ready installed airbrake
cover
Carbon reinforced version of the ASH31
PowerBox Champion SRS including Teleconverter for telemetry
2x Futaba R7003SB FASSTest 2.4 GHz receiver
Castle Creations Phoenix Edge 120 HV + Castle Link Quick Connect
2x Motor batteries Thunder Power TP5000-5SPF70
2x RX batteries A123 6.6V 2500 mAh
Futaba T18MZ
Table 2. Summary of my order from Paritech and the additional components I've ordered.
Revision 1
5
2014-09-25 Unpacking
After what seems like an eternity I was finally able to meet my new friend at the post terminal in
Årsta, Stockholm. Unpacking was rather nerve wrecking since the prospect of shipping damage
would be unbearable after having waited 4 months for delivery.
Figure 1. 15 kg glider and 65 kg packing material.
After unpacking, the plane was transferred to my car and later my apartment, both of which all the
sudden seem very small.
Figure 2. A trunk full of happiness!
Figure 3. Inspected for shipping damages and
assembled in living room.
Luckily, I could not find any shipping damages and after having assembled the glider in my living
room I started to realize the size of this puppy. The images below show what parts of the build that
I’ve let Paritech take care of.
Revision 1
6
Figure 4. Top view from the left.
Figure 5. Canopy close up.
Figure 6. Close up of sliding window.
Figure 7. Front view of canopy.
Figure 8. Scale cockpit from Axel Pfannmüller.
Revision 1
7
Figure 9. Seat with harness.
Figure 10. Map pocket and microphone.
Figure 11. Retract mechanism lever.
Figure 12. Joystick and seat detail.
Figure 13. Flap mechanism lever.
Figure 14. Decals inside cockpit.
Revision 1
9
2014-09-27 Servo connectors between inner wings and fuselage
For whatever reason, I started my build by working on the servo connectors for the wing that
connect to the fuselage. I prefer when servo connectors are fixed to both wings and fuselage. This
avoids fiddling with loose connectors every time it’s time to assemble.
Due to the fact that the inner sections of the wings are not orthogonal to the wing joiner the
connectors need stand-offs to provide the right angle. I made these out of plywood and later painted
them white so that they blend into the wing.
The 9-pin d-sub comes with the wiring harness from PowerBox Systems that Paritech offer. The short
connector frames from Lindinger (http://shop.lindinger.at/product_info.php?products_id=54857) do
a great job securing the multiplex connectors to the wing and fuselage.
Figure 20. Front view of 9-pin d-sub and short connector frames for multiplex connectors.
Figure 21. Top view of the angled connectors in the wing root.
Revision 1
10
Figure 22. Top view showing the angle with respect to the wing joiner.
In order to accurately transfer the location of the connectors from the wings to the fuselage I created
templates from balsa. The wing joiner and together with the positioning pins provide accuracy and
repeatability.
Figure 23. Inner and outer wing profile templates for servo connectors.
Revision 1
11
Next, the hole pattern was transferred to the fuselage…
Figure 24. Image taken from the inside of the fuselage with the wing mounted including servo connectors.
and the inside surface was sanded to ensure a good bond with the epoxy.
Figure 25. The inside was sanded to provide a better surface for the epoxy.
I made the internal servo-connector support from plywood and adjusted the standoffs to create the
correct angle with respect to the fuselage.
Figure 26. Internal servo-connector support from plywood with standoffs.
Revision 1
12
The servo-connector support was glued to the inside of the fuselage…
Figure 27. Servo-connector support from inside fuselage.
and epoxy mixed with fiberglass flock was used to strengthen the joint.
Figure 28. Servo-connector support glued into position with epoxy mixed with fiberglass flock to strengthen the joint.
The fuselage servo-connector supports were painted black to allow them to blend into the cutouts.
Three countersunk screws were used to fasten it further from the outside.
Figure 29. Finished servo-connector support from outside securely fastened using three screws.
Revision 1
13
Figure 30. Finished inner-wing section with servo connectors.
The inner wing connectors now fit snuggly together with the fuselage and servo-connector.
Revision 1
14
2014-10-05 Installation of supports inside fuselage
Today I’ve been working on the support for the PowerBox Champion SRS system, the rudder servo
holder, the Castle Creations ESC and the battery holder for the AFT19XS. The supports were
fabricated by using cardboard to create templates that takes the curvature of the fuselage into
account.
Figure 31. Cardboard templates for servo connectors, tow release servo, battery tray, rudder servo and PowerBox.
Figure 32. Plywood support for the PowerBox Champion SRS system.
The pushrod for the rudder runs behind the support through a cutout in the ribs that hold the cover
plate in position. The right hand Velcro fasteners are the rigid industry type and the left is a regular
Velcro fastener. I first tried all industry Velcro, but this made it close to impossible to remove the
PowerBox.
Revision 1
15
The PowerBox Champion SRS (http://www.powerbox-systems.com/produkte/powerbox-
systeme/powerbox-champion-srs.html) provide dual receiver inputs using S.Bus, dual receiver
batteries and built in servo synchronization, which I will utilize for the dual aileron servos.
Figure 33. PowerBox Champion SRS mounted on the support.
Table 3 shows the channel assignment for the PowerBox Champion SRS.
TX channel
TX function
# Servos
Regulator
Output
Fail
Servo Type
1
Elevator
1
B
A
Hold
HS-7955TG
2
Rudder
1
A
M
Hold
HS-5645MG
3
Motor
1
A
N
FS
-
4
Aileron
2
A
I,J
Hold
HS-5125MG
5
Aileron2
2
B
B,C
Hold
HS-5125MG
6
Airbrake
1
A
G
Hold
HS-225MG
7
Airbrake
1
A
H
Hold
HS-225MG
8
Flap
1
A
K
Hold
HS-5245MG
9
Flap2
1
B
D
Hold
HS-5245MG
10
Flap3
1
A
L
Hold
HS-5645MG
11
Flap4
1
B
E
Hold
HS-5645MG
12
Brake
1
A
O
Hold
HS-5125MG
13
Gear
1
A
P
Hold
HS-645MG
14
Tow
1
A
Q
Hold
HS-5645MG
15
Vario
1
B
F
Hold
-
16
Camber
-
-
-
-
-
DG1/17
-
-
-
-
-
-
DG2/18
-
-
-
-
-
-
Total
17
Table 3. PowerBox Champion SRS channel assignment.
Revision 1
16
Similarly, a support for the motor batteries was fabricated along with a rudder servo holder and ribs
for the ESC.
Figure 34. Motor batteries test fitted on top of battery tray, rudder servo (HS-5645MG) in servo frame from Paritech and
the Castle Creations Phoenix Edge HV 120 mounted to its support ribs.
For this build I decided to get a servo tester HFP-25 from Hitech. It has proven to be extremely useful
both during servo installation but also during the servo synchronization process for the ailerons.
Figure 35. The HFP-25 from Hitech is a valuable tool for easy servo installation.
(http://hitecrcd.com/products/servos/digital-servo-programmers-2/hfp-25-digital-servo-programmer-tester-2/product)
Revision 1
17
2014-10-11 Wheel brake and tow release servo
Today I’ve mounted the wheel brake servo as well as the tow release servo.
For the wheel brake servo (HS-5125MG) I’ve used a servo frame from http://www.servorahmen.de/.
The heat shrink around the linkage provide a smooth surface to prevent snags on the aluminum
edge.
Figure 36. The heat shrink around the linkage prove a smooth surface to avoid snags over the aluminum edge.
Revision 1
18
The tow release servo (HS-5645MG) is held in place by a servo frame from Paritech. The pushrod is a
M3 threaded rod with a 5 mm carbon support to strengthen the pushrod. Although not visible in the
image I glued two hull shaped plywood ribs to the servo frame to ensure a good glue joint.
Figure 37. Tow release servo (HS-5645MG) mounted in front of motor battery tray.
Revision 1
19
2014-10-12 Outer wings servo connectors
Fitting the outer wing panel connectors is a rather tedious job and it is not really practical to use the
multiplex connector frames. However, by carefully milling out just enough to allow the connectors to
be glued in position accurately it was possible to get a snug fit.
Figure 38. Outer wing panels servo connectors.
This work has to be done while making sure that the connector doesn’t interfere with the servo
frame since it is mounted very close to the connector.
Figure 39. The inner aileron servo is mounted very close to the MPX servo connector.
Revision 1
20
2014-10-18 Wings servos
Today it was time to mount the servos in the wings. One of the spoilers gave me some headache
since it was not operating smooth enough, but after some adjustments it now seems to work well. All
wing servos are held in place using the servo frames supplied by Paritech.
Figure 40. Spoiler servo HS-225MG.
Figure 41. Inner flap servo (HS-5645MG) next to the spoiler servo.
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