Viper SD4 RTC

TOMARK ✈︎ VIPER SD4 RTC

Scheduled arrival date:  13 November 2026

Aircraft Flight Manual (AFM) ✈︎ VIPER SD4 RTC

Specifications

Powerplant:  4-stroke ROTAX 912 engine 100 hp

Propeller 3-blade:  DUC FLASH-R or Neuform CR3065

Strictly forbidden:  No aerobatics.  No intentional spins. 

SPEEDS

Cruising speed:  190 km/h (102 kt)

Stall speed flaps UP:  49 kts.

Stall speed flaps 2 (normal landing):  43 kts.

Best angle of climb speed (Vx):  53 kts

Best rate of climb speed (Vy):  65 kts

Best glide speed:  64 kts

Climb rate:  905 ft/min

DISTANCES

Take-off distance:  195 m (905 ft.)

Landing distance:  210 m (689 ft.)

Range:  1,400 km (756 NM)

Glide ratio range:  8:1

FUEL

Total capacity Fuel tank:  100 litres (26.4 US gal);  50 litres in each fuel tank (wing)

Useable Fuel capacity:  90 litres

The following fuels may be used: AvGas 100LL or MoGas

OIL

Oil:  SHELL Aero Shell Sport Plus 4 (recommended)  

Total Oil Capacity:  3.5 liters (with oil cooler)

Refill Quantity:  3 liters

Oil Quantity Operating Range:  2.5 - 3 liters (in sump; oil level between min. and max. mark)

WEIGHTS

Max Take Off Weight (MTOW):  600 kg

Max Landing Weight (MLW):  600 kg

Empty Weight:  376 kg  (Max:  405 kg)

Fuel tank capacity:  72 kg (2 x 50 liters) 

WIND LIMITATIONS

Maximum demonstrated components of wind for Take-off and Landing:   

Crosswind:  Max 15 kts

Tailwind:  Max 5 kts

FLAPS

UP = Retracted

1 = 15 degrees

2 = 30 degrees = Normal landing configuration

3 = 40 degrees = Only for precautionary 'Short-Field Landing' i.e. Non-Normal operations

Avionics

Viper SD4 RTC, manufactured by TOMARK, are equipped with dual high resolution touch screen EFIS - Electronic Flight Instrument Display - ( DYNON Avionics Skyview HDX 1100 - 10 inch ) and displays the primary flight display, navigation mapping and the engine monitoring system (EMS).

Quick Tips

Menu Page

Info Button & Page

Nearest (NRST)

Direct TO

Introduction:  Touchscreen features

Knobs & Buttons

Display Page & Layout

Display Button & Page

Transponder

COM Radio

SV-Comm Panel

Menu Page & Touchscreen Controls

Comm Radio

Engine Management System (EMS)

Engine Lean Assist Features

Screen Layout Management

MENU Button & Page