pitts.pdf

Pitts S-2C or Ultimate Pitts Park Flyer

Control Horn Detail

Square wing tips for Ultimate Pitts

.032 wire control rods

Wing cut from one piece of Depron foam

Top wing

Cut micro

servo arm

or Zip-Tie

control horn

Cut 6mm slots for strut tabs.

Dry fit and trim excise.

Aileron Servo

Use Du-Bro Micro E/Z Links

Strip plastic cover

from small gauge wire

and CA to ends of

control rods

Fabricate control horns

from spare micro servo

control arms or nylon

Zip-Ties.

Aileron to aileron control horns. Cut a

slot for horn dry fit, remove and CA back

in place. See aileron detail diagram.

Cut dotted line for optional Ultimate Pitts

Hinge Detail

Use 1” wide clear packing

tape for hinges. Clean all parts with

rubbing alcohol before taping.

Wing cut from one piece of Depron foam

Ta p e

Cut 6mm slots for strut tabs.

Dry fit and trim excise.

Aileron control horns

Note: Wing can be strengthened with 1/2” nylon filament strapping

tape (3M brand) or 4mm carbon fiber tube (bottom wing only). To save

weight cut width of strapping tape down to 2/8 and apply to bottoms

of both wings. If using carbon fiber tube cut a channel (per plan) on

the bottom of the bottom wing only and CA or use RC Z 56.

PITTS PARK FLYER SPECS

PROVEN SYSTEM RECOMMENDATIONS

MATERIALS LIST

Wing Span....... 30”

Lienth............ 30”

Weight............11-13oz

Power.............GWS EPS350C

Max 3D Power... Brushless motor fit

to GWS EPS350C gearbox

Prop.............. GWS 11x4 -- 12x4

Ch................ 4

Battery.......... 3 Cell-700 to 1200mAh-Li-Poly

Rx and Servos

* GWS R-4PII 4ch receiver

* 3 Waypoint W-084 Micro Servos

or Hitec HS 55

Brushed Motor (Good performance)

* GWS EPS350C “DS” Gearing Motor

* GWS ICS-300 Speed Controller

* Prop GWS 12x6 Slow Flyer

* 3 Cell-800-1200mAh-11.1v Li-Poly Battery

Brushless Motor

* AXI 2212/34 outrunner (Max performance)

* Phoenix 25amp speed controller

* 3 Cell 700-1200mAh-11.1v Li-Poly Battery

* GWS 12x6 Slow Flyer or APC 12x3.8 electric

OR...

* HiMaxx 4100 or 5400 (Max performance)

w/GWS 350C “DS” gearbobx

* Phoenix 25amp speed controller

* 3 Cell 700-1200mAh-11.1v Li-Poly Battery

* GWS 12x6 Slow Flyer

* Depron 6mm White (www.depronusa.com)

* 30” 4mm wrapped carbon fiber tube

* Medium or Thick foam friendly CA

* Foam friendly CA accelerator

* JZ Products Super RC “Z’ 56 glue

* 1” Self-sticking Hook & Loop (Velcro) tape

* 1/2” 3M nylon strapping tape

* Clear packing tape

* 4 Du-Bro Micro Control Horns No. 848

* 4 Du-Bro Micro E/Z Links No. 849

* 1” wide self-sticking hook & Loop (Velcro)

* .032 wire control arms

* 1/2” Nylon Filament Strapping (3M brand)

* Zagi tape for trim scheme (optional)

* Straight edge razorblades

* No. 11 Xacto knife

* Metal yardstick

* 3M Photomount Spray Adhesive

(for plan transfer to Depron)

Alternative AXI Brushless Motor setup

AXI 2208/34 External Rotor Brushless

Groove and glue in 4mm wrapped carbon tube

Denotes cut-lines

3/8” square (light) hardwood block

mounts to the GWS gearbox assembly

TIPS:

1/8” light plywood radial mount,

reinforced with balsa triangle stock

on all 4 sides

Lighty coat back of plan parts with

Spray Adhesive, apply each part to

Depron. Carefully cut each out

using a strightedge and #11 Xacto.

Dry fit assembly--check alignment.

Round the leading edges by sanding.

Apply trim scheme before final

assembly.

A Rotary Tool Cutting Adapter is

perfect for clean, easy to make,

grooves for Fiber Carbon rod

stiffiners. Glue stiffiners in with

RC Z 56 or medium/thick CA.

Assemble using RC Z 56 or medium

or thick CA. Colored Zagi tape works

great for trim. It’s best to trim each

part before assembly.

The Pitts is a hoovering machine!

Add lots of expo and experiment

with different CGs.

Tab is extended to allow for flush

trimming during dry fitting of wing.

Rear

Front

Rudder cut line

Cut and glue on 2 side cheeks from scrap Depron from this line forward.

This will help reinforce the hardwood block.

GWS EPS350C “DS” Gearing

Denotes cut-lines

Control Horns (Du-Bro Micro)

Elevator Servo

4mm wrapped carbon tube fuselage stiffener. Groove foam

and glue with order-free (foam freindly) CA or JZ Products

Super RC Z 56

.032 Wire Pushrod

Note: Mount speed controller as close to motor as possible.

3/8” square (light) hardwood

block mounts to the GWS gear-

box assembly

Rudder Servo

2-3 Cell

700-1200 mAh

Li-Poly Battery

Aileron Servo

Drill 3/16 (4mm) hole in back end of hardwood block.

Make sure hole is slightly big to allow for adjustment

while fitting and gluing. Use epoxy for this step.

Inch Scale reference,

check after printing.

Note:Tail and rudder servos placement is approximate.

Locate and mount servos so the plane balances on the CG

with all components except battery. This allows for battery

movement fore and aft to fine tune CG and allow for differ-

ent flight characteristics.

Note: Battery location is approximate. Adjust accordingly based

on battery weight, dimensions and desired flight characteristics.

Mount using self-sticking hook and loop (Velcro) tape.

Bottom Tab

All airframe parts and control surfaces are cut from 6mm Deporn Foam

Wrap servos in removable tape,

use low temp hot-glue or thick CA

to secure. Mount Speed Controller

and Rx with double sided sticky foam.

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