Originally Posted by SteveT.
You need to understand, that it is not just weight per square in of wing, but also cubic wing loading
. If yoo compare the cubic wing loading of your 59" Slick, and the Edge, you will find that the Edge comes out with much more favorable numbers....
And.....these planes have been designed for these engines or motors, and are going to fly just fine.....don't over-think it, all the thinking that needs to be done has already been done....get the plane, put the engine/motor of choice on it and go fly. I guarantee you will find that it will fly great!!
Thanks Steve. I have read some about Cubic Loading but didn't really understand it much. You are right, I was/am overthinking it. I'm always nervous setting up a new plane especially being the first time setting up gas I want to get it right.
Originally Posted by Bivens
First, as planes get larger...the wing loading MUST increase to maintain the same "feel"...and "energy" as smaller planes. For example...the wing loading on a 40%er is MUCH higher than that of your 59 slick too...but I PROMISE you that you won't feel it as a bad thing.....Just like Steve says...CUBIC LOADING is the factor that you should compare...that concept was developed in the interest of being able to compare the "feel" of different sizes of planes and knowing what to expect.....wing loading does not scale up with airframe size as you would expect.
Second.....This edge flies GREAT with the GT33 on a stock pipe...not heavy at all....holds energy very well...flies nearly 20 minutes easy on a 10oz tank, with reserve. Run a single 2200mah 2s lipo pack for the RX
...power the ignition from that pack through an opto-kill or IBEC
( I believe the OS ignitions are safe to run at 2s lipo voltage....but you need to confirm this...I run mine through an IBEC that regulates it down to less than 6v....because I had it laying around). I'm running a full size throttle servo
...and I'd advise you to follow that trend in the interest of durability....I've seen mini-servos die more often on the throttle of 30cc planes...and the weight savings there is not enough to matter much.
Will it be heavier than electric....yes. Will it fly great...YES. I've flown Joe's eleccy version with the superfast servos...it flies really nice....and maybe a little lighter...but I am very happy with gas.
The truth is....If you've never owned a GT33 powered 74..or 72...or 71.....you should try one someday and develop your own opinion. If you are still not sure you'll like it...just go electric...no big deal. Both setups are great.
This size airframe is the perfect place to make the overlap from gas to Electric for almost everyone....it flies great with longer flight times if gas....is lighter but only flies 5-7 minutes if electric. For me, I'm GAS in this size.....I've had electric 6s planes before and still do (70 slick, 68 velox, 65 vyper, Osiris)...the velox, vyper, and Osiris are all smaller and lighter than the 70....I have had great results with those...but my hacker in the 70 ALWAYS ran hot for me...and Wamsy promptly cooked it when I sold it to him....and I've cooked other 6s motors before also. I like Gas because IF you want to be stupid...you can just firewall it for 15 minutes, land, fuel it back up, and do it all again...without letting anything cool off between flights or needing to conserve energy to fly as long as you want.
For me...I like gas in this size...and DEFINATELY anything larger. Most others like electric in the 30cc size.......and Many others extend electric up to 60cc with ease, and even up to 120cc. So you can definately choose either way and draw advice from plenty of others.
Wamsy has a GREAT 72 now electric...and Joe's E-74 is amazing. Myself and Arron have gas 74's....they all fly great. It's nice to have options.
The one common theme between all of these great planes is to put GOOD servos in them...you'll regret it if you use cheap servos...then fly a plane that's setup with the good stuff.
Sorry for the long post....just felt like typing I suppose.
If you really want to know how it feels...come on down to K-town and you can fly it....and the 103, and the 119...we'll have a little experiment with wing loading vs. cubic loading.....you do the math, I'll provide the airplanes...
Thanks, Bivens. I have watched your videos of this plane on the OS, but you are a really good pilot and sometimes its hard to tell if a plane really flies that good or if the pilot just makes it look that good. (I believe Joe Smith could make a brick with no wings look like it 3d's easy.
) You have all convinced me to go with this engine and I will be ordering it tomorrow. Like you said if I don't like the way it flies I can still go electric and put this engine into something else later.
I will be running Savox 1258TG's all around including throttle. I do agree completely with you on not using lesser quality parts. I never skimp on servos or motor/engine. I will be a little while getting them rounded up as I don't have the funds currently. I really don't have money for the engine right now but I can't let this sale go by.
I am building a fiji water bottle tank with PSP Mfg hardware. I found 11oz fiji bottles at Wal-mart here and they are the perfect size. I can only fill them 8 oz if I want to save weight or fill completely for extended flight times.
My Rx/ignition battery will be a 2300mah A123 from Hangtimes.com. I will be running a Tech Aero Ultra IBEC to the ignition. I know a few people running them and they are made in the US which is a big deal to me.
Thanks so much to everyone for replying so quickly to this. I was away from the computer for a couple hours and come back to a ton of information helping me out.