V-bar efficiency question

[Funflyer]

I'm currently planning the purchase of a logo, probably 500 for cost reasons. I don't want to spend a fortune but at the same time I don't like to buy things twice. I'd rather get the right stuff from the beginning. That's where my question comes in. I know the V-bar is expensive but I wonder if it could be an investment of sorts.

Here's my "reasoning". If I get the V-bar then I don't need a tail gyro so that saves some money and I'm wondering if the rest could come from saved battery cost. If the V-bar gives longer flight times then I won't need as many batteries, right? Ok, I'll be the first to say my reasoning may be ...:bs. But humor me please.

Anyone have data or some general flight time information with and without the V-bar?

[OICU812]

Your actual flight times gains are in the 5-10% max that is the honest answer. So if you are running say 4 minutes on a flybar 600 you can expect to see 4:20;4:35 with the same pitch ranges and headspeed. This is what I have experienced with owning and flying both.

[Funflyer]

Hmmm, I thought the differences were a little more than 10%, maybe it's a greater impact on a 500 with mostly sport flying? I thought it was a difference of maybe 7 minutes flight time improved to 8 or maybe 9 minutes. But I don't have any experience with a logo or v-bar so there's a really good chance that I am wrong. :D

[stvjeep]

I see the logic behind your reasoning. I too thought you would get about a 20% increase in run time. The thing I like the best about the V-Bar is that there are less moving parts in the head. The price for a fully equipped Logo 500 with all the gear to run it (tx, charger..) is about $2500 or so. A little pricey.

[OICU812]

Yes well the agility abilities are a fair bit more, your pitch range is much greater as is your cyclic range due to only two linkages running from swash to the grips.

[wlfk]

I thought most people lowered their headspeeds - people doing 3d on less than 2000 (600 size) for example.

Might you be able to reach 20% this way?

K

[fireup]

I thought most people lowered their headspeeds - people doing 3d on less than 2000 (600 size) for example.

Might you be able to reach 20% this way?

K

Yes, I would agree with Shawn on this, about 5%-10%. Yes you can do 3D with lower headspeed, but when you know there's that much more power, you tend to want to use it up, and fly for the same amount of time but get more power.:)

[OICU812]

I thought most people lowered their headspeeds - people doing 3d on less than 2000 (600 size) for example.

Might you be able to reach 20% this way?

K


Yes you can, but like Kevin stated when it's thre most people tend to use the HS to acheive the snappy pop.

[wlfk]

I guess an answer might be to use a combination of lower headspeed and heavier blades, if available, so that you can store the same amount of kinetic energy in them.

If batteries became 2x lighter for the same capacity, would you buy a battery half the weight, but put up with the same low flight times, or buy a battery the same weight and enjoy longer flights but with the same performance?

Decisions, decisions,

K

[OICU812]

LOL well this all really depends what you are looking for, it can offer both, that is the hest answer. It allows you to do 3D at a much lower HS than flybar, yes this is true. Will you want to fly at a lower HS, maybe .....

I myself and am always pretty power hungry, don't really know why but I like to have the power of a lightning bolt at all times it seems, lol. I always try to fly a moderate setup but usually only lasts a day or two it seems.

By your questions and comments I can only assume it would work for your needs, from mild to wild it can be, with headspeeds and settings. Only thing to be aware of is it does take alot of educating yourself to setup and optimize a Vbar, if you do not know what to look for and do not understand how to adjust you will never acheive a perfectly tuned heli. Just to be honest as many people including myself have found it to be much more in depth than you think off the bat...

And as per your last Q, me I would take the same flight time but at a better power ratio, simply because after 5 mins tops in the air there is nothing left to do,,, if you are just learning or wanting to try new stuff yes over 5 mins is good, otherwise useless to me. :D

[jamesotron99]

I don't disagree with Shawn on any particular point, but I want to point out that we're not all crazy power freaks :)

I'm geared for around 2100rpm on all my Logo's, which when I first got my Logo 10 was considered a pretty extreme headspeed. With flybarless you can use blades with a longer chord to get the same effect and save electrons for when you need them.

With or without the vbar you can regear for different performance as your skils increase. I first flew my Logo 10 on 5S lipo with 1800rpm headspeed and the performance was still pretty exciting.