skatsrc

Does anyone fly a Zephyr EDF? Just wondering which size battery works best regarding W&B.

Sherv

My Feedback: (1)

It was just released a week ago, doubt anyone has received them yet. I just ordered mine this morning but without the batteries. I am waiting to hear from other users which size will give the best balance for CG. I dont care about capacity.. I care about weight and CG. I'll post back when I find some info regarding size.

Sherv

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Scott has mentioned that this battery is the only 4000mAh that can fit/weight wise.
http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html

So i'm guessing 250-290gram max is the weight you should be looking at.

da Rock

Scott who?

The battery compartment size is the important detail. Then you'd have to consider what range of weights that would fit in there and what effect they'd have on the CG of the model.

You'd be surprised how smaller batteries can increase climb performance. They don't automatically unbalance the plane either. It depends on the mass of the plane and where the battery can be positioned.

It really would be good to hear from someone who has flown the sucker.

Sherv

My Feedback: (1)

This is scott
http://www.youtube.com/watch?v=RKNy6aP3gCU

he said the zippy compact is the only 4000 battery that fits on RCgroups. He posts there.

da Rock

OK,

now the original question was "which is best" so let's explore that.

Depending on the size of the battery compartment the best would have to fit. Then it'd have to give the performance the OP considers he wants the most. If he wants the longest motor times, then the most capacity he can get into that hole would be the best performing. Seldom is that the goal for most thermal flyers. Looking at the model, it's really not going to be a super thermal glider from the git-go. It's small as good thermal gliders go and has a huge drag producer that doesn't fold away when not in use. So maybe he wants a hotliner, something that he's going to yo-yo. Shoot it up again and again. Then capacity is good to have. But so is lighter weight. It's a puzzle until the use is known.

Anybody got one yet?

Sherv

My Feedback: (1)

Seems CG is hard to get on this plane. Battery weight should be 280-320grams to get cg easily. CG is 75-80mm from leading edge of wing while inverted.
The plane seems to be nice but I already put a request to cancel my order. 3-4min flight times, it glides well, and is a little troublesome to launch. I think I'll take the money and buy a balsa fournier.

skatsrc

Good info, thanks. What do you mean about "troublesome to launch"?

y2blade

I'm very tempted to order one of these, they look fantastic.

[youtube]http://www.youtube.com/watch?v=cT35J4frBuk[/youtube]

Would it make a good powered glider for a new flyer (years of Electric Helis but no fixed wing yet)?