Qjet air bleeds

The A-4 Skyhawk commands a beloved place in aviation history. Designed by the famed Ed Heinemann for Douglas Aircraft in the 1950s, the A-4 was optimized as a multi-role aircraft that used its low weight, high maneuverability, and straightforward reliability to lethal advantage. The Skyhawk’s nearly 70 year history of distinguished service and its continued operation to this day is testament to the timelessness of “Heinemann’s Hotrod.”

To honor this beloved aircraft we proudly offer the Freewing 80mm A-4E/F Skyhawk! The biggest mass produced foam electric A-4 in the world, this flying model is powered by a 3530-1850kv brushless outrunner motor and 12 blade EDF ducted fan, achieving a top speed of 95 mph/150kph using the recommended 6s 5000mAh battery. See the comparison photo with our Freewing twin 80mm F-14 to get a sense of the A-4’s overall displacement!

Adding to the model’s visual versatility, the later version avionics “hump” is also included! Attach this magnetic “hump” onto the fuselage’s upper spine to change between two variants of the Skyhawk. Two complete waterslide decal sets are also included, depicting a US Navy A-4 from VA-22 and a US Marines A-4 from VMA-311. Fly either of these with pride, or personalize you’re A-4 with another livery of your choosing! We partner with  Callie-Graphics.com  for professional custom decals. 

Welcome to the world of Mercedes-Benz Familiarise yourself with your engine and read the Operating Instructions before you use the engine. This will help you to avoid endanger- ing yourself or others. The standard equipment and product descrip- tion of your engine may vary, depending on individual specifications.

Contents Index ............4 At a glance ........... 13 General information ......7 Safety ........... 29 Driving mode/working mode ..... 33 Maintenance and care ......45 Notes on maintenance ....... 59 Decommission and protection ... 79 Breakdown assistance ....... 85 Technical data ........

Index Coolant (engine) Topping up ........76 Adaptation module ......21 Coolant additive ........48 ® AdBlue /DEF Cooling system Components ........19 Degreasing ........76 Consumption ........41 Flushing ........... 76 Refuelling ......... 42 Correct use ..........9 Replacing the filter ......69 Corrosion inhibitor/antifreeze Service product .......

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You may have seen octane stickers on gas pumps that list the AKI using the equation R + M / 2 = Octane. The R stands for research octane number (RON) while M represents motor octane number (MON). RON is always much higher than MON, which is why the AKI uses an average of the two numbers to best represent the AKI for street-driven engines. The accompanying chart lists both RON and MON for ethanol and methanol plus a couple of popular race gasolines so you can get an idea of how ethanol and E85 compare.

Straight ethanol has an AKI rating of 113-115. E85 is generally rated at between 100 and 105, depending upon the manufacturer. The E85 we tested, supplied by American Ethanol out of Chicago, is rated at 105. E85 is most often blended with 87-octane gasoline, since it is the least expensive. Another advantage to ethanol is that the greater volume of fuel required also tends to reduce inlet air temperatures, where evaporating fuel pulls heat out of the incoming air temperature.

Air/Fuel Ratio Chart
This accompanying chart offers comparisons of E85 and straight ethanol (or Jack Daniels, if you prefer), to gasoline. Stoichiometric is the term used to refer to the chemically correct air/fuel ratio that also creates the least emissions. This is also the air/fuel ratio most production engines are tuned to achieve at part-throttle. A leaner fuel mixture can generate better mileage, while a fuel-rich ratio generally will make more power by ensuring most of the air is used to create power.

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