If Engine RPM drops more than 200-300 RPM after battery removal then either the glow plug is too cold or the nitro conent in the fuel is too low.
Reliable idle is around 3000 RPM with glow engines. On some engines it is possible to get to 2200.
Short glow plugs are for engines in the .15 to .25 cu displacement range and smaller.
Color code your fuel lines.
Adjust your idle with external battery power to the glow plug then disconnect the plug and wait a minute before testing to see if repsonse works and if it indeed will not cut off after an extended idle.
Learn to fly on a PC then fly using a "Buddy Box" system at the field.
Replace your batters every two years. Also paint on them the date they were purchased!
Only works in for channels in the 72 MHz band for RC Planes
Drop the whole number (72.630 becomes .630)
add .210 (.630 becomes .840)
divide by two (.840 becomes .420)
multiple by 100 (.420 becomes 42)
or ((frequency - 72) +.21) / 2 * 100
and that whole number is the channel number assigned for R/C Aircraft use in the 72 MHz frequency.
Channel to Frequency:
((channel number / 100) * 2) - .21 + 72 = Frequency in MHz
Breaking in an ABC (Aluminum Bronze Chrome) engine takes around 1 hour. When bench breaking it in use the same type of prop as what will be used when flown.
Ringed engines use a prop 1" smaller in diameter than what is normal when flown. Ringed engines take 2 to 3 hours to break in.
You should be able to get a reliable idle of an R/C 2 cycle engine at 3,000 RPM. Sometimes you can get it down to 2,200 RPM.
Adjust the idle with the glow starter attached, take it off, wait a minute, before seeing if it will not lean or flood when the throttle is moved.
OS 1.08 Zinger 14 x 8 APC 15 x 8
G-38 Zinger 18 x 8 APC 20 x 8 Moki 20 x 8 Moki 20 x 10 Moki 22 x 8 3 Bladed 18 x 10
Moki 2.1 Zinger 20 x 8 Zinger 20 x 10
G-62 Zinger 22 x 10 Zinger 24 x 8 APC 22 x 12 APC 24 x 10
Physics Formula for speed: PITCH * RPM / 1060
Note: It does not matter what the diameter of the prop is! The above formula will show the theoretical maximum speed that will the prop can travel through the air (in mph) for any prop size - - from a 1" diameter to a 12 foot diameter prop!
High Speed needle valve should be set so the engine runs 400 to 500 below
An engine at idle should be turn over between 2,200 and 2,400 RPM
Once at Idle
Always ensure a four-stroke engine runs slightly rich. An engine will lean in the air and too lean of an engine will cause detonation and will likely throw the prop (along with the hub, prop washer, nut somewhere off to the side or front of the aircraft - about where you are!)Adjust it to be another 100 RPM lower (richer fuel feed) when in dry cooler weather.
Two-stoke engines also need to run slightly rich but it is not as critical to get it "just right" as it is for four-strokes.
Check prop nut and safety nut is tight before every flight.
After the initial 10 hours of running a new engine check the engine to ensure nothing is loose. Thereafter do an "annual" on the engine every 10 hours of running time to check for lose or worn exterior parts.
Once it reaches 50 hours of running tear it apart and check everything. (If you do not have a good clean undisturbed place to take apart and leave the many many little pieces of an engine lying around for a few weeks, send it off to a repair shop.)
The OS Type "F" is a long plug. This was the first out specifically for 4-strokes. It, and the many other brands now out there, being longer it extended into the combustion chamber thus getting and staying hotter. This allows it to retain its glow during the three strokes that the engine is getting ready to fire on the 4th. Never use a "long" plug on 2 cycle glows below 1.2 CU. The piston may hit a long plug unless the manufacturer of the engine specifically states that you can.
So many choices. Any fuel with 15% nitro will work. 5% oil content (by volume) is good to have since extra fuel is not being inserted to cool and lubricate the engine when compared to how a two-stroke uses fuel to cool itself.
Like fuel so many choices. Keep the RPM between 9,000 and 11,000 RPM (rough area where most reach peak horsepower) and it should fly well.
Owners choice. Air Tool Oil works, as does Marvel Mystery Oil, Mobile 1, Synthetic Engine Oil
RTV = Room Temperature Vulcanizing
This material is great. However, be careful to use only RTV on electronic components that state either: Electronic Grade, low order, acetic free, neutral cure or omime cure on their labels. All others are caustic and will destroy electronic parts over time.
Use bicycle spokes.
Use polyurethane along the edges of iron on coverings. A thin coat of clear will weld them together.
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