18? Video gamer ? This will be a cake walk for him.
I have a squadron of edf's ranging from the small 50mm's to 64mm's to 70mm's . All have their unique character in terms of flyability.
As this is the first go in the category and he's already experienced with flying wings, etc. there should be nothing to fear.
A couple of things to check: 1). CG- very important that these planes are balanced properly. Find a thread somewhere on the particular model. Check RCG. Often times the mfg.'s recommended cg is off ( by a lot). 2). fan balancing- Many come with poorly balanced fans. Not good. If you know someone who has a dynamic balancer, great. If not, there are several you tubes to show you how to balance edf fans. A well balanced fan makes a world of difference 3). Make sure the blades are not rubbing against the shroud. Not good. Sometimes it take a little light sanding to gain the blade clearance.
On average, expect about 4 minutes of flight time. Most edf pilots fly them wide open. After all, that's why we buy them right? Most will stall rather easily, especially when not enough power is applied through the turns.
One other thing I failed to mention. If you have a computer radio and I assume you do, you're gonna want to setup dual rates. Hi and low. I take off on high , switch to low and land on high. But that's just me. Check the throws for each rate.
You're also gonna want to include plenty of expo. on edf's I use about 50% for aileron and elevator. I assume this plane is using an elevon mix ?
Lower rates and more expo will help with the twitchiness these bird can display. At least as you're getting used to it.
Great advice. Hawk. The only advice I have and it already has been given keep your speed up and have a blast. Oh also I would add this. I have a tradition on every maiden flight. Prior to taking off I always take a picture. I always say that it may never look this good again I state my pucker factor based on 1-10 one being the least puckered. I am usually at a 12 on a maiden. Then I go for it. Since I have done that in that order I have always had a successful maiden. Just my .02 worth
Happy flying may your crashes be limited and if they are not limited let them be cool.
The RC Games: May the odds forever be in your favour...and the trees not suddenly appear when you are landing, or a huge gust of wind, or the sun blinding you, making you lose sight of the plane...and so on.
Flys ok, but not fast. Gave it to friend as I did not like it.
Flew what one time? Are you the son of the OP? Most ARF edf's are snails out of the box. They need some help to fly like a jet!
edit:never mind. I didn't read the beginning of your post in the title. I never read those usually.
Now we get into the issues with foam RTF/RX-ready EDF models...
Often its something really simple to improve performance. Most of the time its just inadequate air intake.
mmmm most I see ... inadequate performance is due to the Factory recc'd LiPo being too small and unable to deliver what motor really wants.
50mm Skyangels are good example .. the 800 3S 20C is a joke. Swap to a 1500 3S 25C pack and you get a good jump in performance. ie my T45 went from 280gr thrust on 800 to 340gr on 1300 LiPo ... same intakes, motor, fan and ESC. On 4S 1600 she jumped to over 450gr ...
+1 on both comments. Air intake and lipo power. Also , on air intake, consider turbulent air flow versus laminar flow going in. If you have a bunch of obstructions in front of the fan disrupting intake , you'll lose some efficiency. The air in front of the fan is called the Fan Swept Area (FSA). An inlet lip on the front of the fan also helps with the intake airflow.
And on the exit side, having the proper exhaust tube dia. for optimal efflux speed can make a big improvement. As a rule, you can never fly faster than the efflux velocity.
On most of these foam molded planes, there's not much one can do to enlarge the tube but for the tubes that are too big, it's easy to apply a tube to make it smaller.
............. The air in front of the fan is called the Fan Swept Area (FSA)....................
I always assumed FSA was the actual swept area of the ACTUAL rotor .... which is the area of the rotor disc minus the centre boss ....
Not the area in front of or behind the fan which has no relation to shaft boss or rotor ...
All calcs of FSA and then efflux tubes / intakes etc. I have seen before calculate first - the actual sweep of the rotor blades, then %age of that for intakes and efflux.
Maybe I'm wrong ?
As to intakes ........... maybe I'm an old fart ... but in the old days of Glow powered jobs ... I'm back in days of Marcus Norman in UK ... use Google to those who don't know the name ... We all kept as near as possible to 100% FSA intake as our motors were based on rear exhaust aerobatic motors ... and needed all the help they could get ... lips were being experimented with.
I still like to see 100% FSA for intakes ... yeh I know - I need to get with the times !