Extreme Flight E Yak vs Extra

[hercdriver7777]

	Quote: Originally Posted by Stainless Skills
	Ultrakote will definitely work. They may even use ultrakote but I am not sure. Turns out that Atlanta hobby actually did have the Airboss 45amp esc in stock so my yak shipped with that. Thanks for the build thread Freddy, it was enlightening. Every time I read something on esc's and the power setups in these yaks in different build threads people seem to be having problems, malfunctions, and annoyances with the electronics right and left. I don’t want to have any of that, I want to be able to program and then leave the thing alone and fly 100 flights without worrying or having to change anything. Is there any information on how to program the Airboss esc correctly so it does not cut off and power down like people are having it do. I am using it with a 4S pack. I think I will try the 12X6 APC which is recommended but I may later try the 12 inch prop like you Freddy, but I will have to buy a wattmeter first probably. Hey Fred, how do you have your Airboss programmed? I know that you may be running it over the specs but what would you recommend me? Should I leave the break on or off, hard or soft acceleration, what’s the proper cut off voltage for a 4 cell pack, does it automatically detect the cutoff voltage or do I have to program it in…………?

The AB45 will hit a weird spot after prolonged WOT on 4s with the 12X6 or 13x6.5. I never had that problem after I swithced to the 13X4. However, this plane really likes a 14X7 and < 40oz for 3D. You can do this with the stock torque motor on 3S but it hurts the packs and flight time. I have tried every combination with the stock motor and am not happy. I'm going to go with a geared system. This will allow me to run a 14x7 3S, cut 5-6 oz on weight over the 4S, and increase flight time. Check the RC Groups thread titled New EF Yak 54. Look at Dynomike's setup.

[Stainless Skills]

Well I have the AB45 esc, and the tork motor recommended with a 4S. Suppose I heard this and I was almost in tears from realizing that my current setup supposedly had no possible way or running correctly.

What prop should I use? Is the weird spot after prolonged WOT always there in every AB esc?

I have a hard time believing that the recommended combo setup that Chris/EF recommends and that most people use has problems that are unable to be fixed.

Is the 12X6 the best prop for my setup or should I try something else?

[hercdriver7777]

	Quote: Originally Posted by Stainless Skills
	Well I have the AB45 esc, and the tork motor recommended with a 4S. Suppose I heard this and I was almost in tears from realizing that my current setup supposedly had no possible way or running correctly. What prop should I use? Is the weird spot after prolonged WOT always there in every AB esc? I have a hard time believing that the recommended combo setup that Chris/EF recommends and that most people use has problems that are unable to be fixed. Is the 12X6 the best prop for my setup or should I try something else?

Dude, I have been flying the stock setup for over 3 months, 100 + flights with the 4s setup the whole time. 4s is ok, but like most stock setups it isnt the best possible setup. You may like your setup, but quite a few people have had the cutoff problem on 4s and no one has come up with a fix for it. Check out this thread: http://www.rcgroups.com/forums/showt...&page=17&pp=15

It will fly ok on 12X6 but it is very difficult to hover and 3D with that prop. I found that I could fly with a 13X4 and it would not hit the weird cutoff and was a little more stable in the hover. Check out Fred Midgett's videos comparing the stock setup on 3s and 4s. Watch the 4s one all the way to the end. Most guys are pretty much in agreeance that the stock setup flys best on a 14X7 on 3s. I just decided to try a geared setup to get the right prop and still get a good flight time out of it.
3S: http://higherplaneproductions.com/me...k_MaidenF3.wmv
4S: http://higherplaneproductions.com/me...k_4sSunset.wmv

I am a believer in extremeflight and Chris. The vids for this Yak on the EF site and the SEEFF one on the net somewhere are done on 3s setup. I think that because the 3S setup is very hard on batteries they took the safe route by recommending 4s. They list the flying weight on the website as 38-40oz. The stock 4s setup will come in closer to 44.

[Stainless Skills]

What props was Fred using in each video?

I hope you or Fred don’t take it personal but because of the way he flew I really cant tell which setup fly's better. I believe you that you need a larger diameter prop to be more stable in 3d but that guy couldn’t hold a torque role to save his life, every time the planes belly faced him he would loose it. He made hovering and basically just flying around look soooo hard I cringed watching. Other than that he just did violent snaps and some harriering so I have no idea which setup fly's better from the videos.

I think I am just going to get a 12X6 and a 13X4 to run with my 4S and see how it fly's.

If I have trouble with the esc or the plane fly's bad then I will spend months saving up to change the power system, I hope I don’t have to though.

It looked like it flew great and was stable in a harrier but I couldn’t not tell if the guy sucked on the corrections or if the plane was just a bad flyer. I really need to hurry up and fly it though before I post again.

[hercdriver7777]

In the 3s vid he was using a 14X7 in the 4s vid he was using a 12X6. I thought these vids were good at demonstrating my point. He had a much easier time with the 3s setup than he did with the 4. You will be happy with this plane. It is the best thing going. Its great on 4s but better on 3s. All my opinion so take to for what you want.

[Stainless Skills]

Now that I watch them again he did have an easier time on the 3S and the plane looked a little more unstable on the 4S. I get your point and I hope it mine turns out to be a great flying plane either way.

[bosshoss]

Ok, now you have piqued my interest on the 3S issue.

I have not watched the vids in months.

post links on the 3S and the 4s here in the thread so we can compare side by side. I have only flown the 4s and love it, but yes, I would love to try different setups just for giggles. But, first I want to watch you guys are watching.

Going out right now to burn 2 4s packs on Christmas morning.

[Stainless Skills]

the video's we are watching are at the bottom of page 4 on this thread. They were posted about 5 posts earlier.

[Freddy Warbird]

If your going to practice IMAC stuff, I'd go for the 4S set up. You can still 3D, but the 16.8V gives you the vertical authority to perform the sequence manuevers. If your just going to just kick it around with lower 3D slow flying stuff, try the 3S set up. It will fly lighter.

[Yakov]

I am putting together one of the Extreme Flight E Extra 300 and ran into a little bit of a delema that I hope someone here can shed some light on.
I am assembling the tail and it says that after glueing the elevator halves together to slip the assembly through the stab slot then insert the stab........
Yeah Right!





Anyone else on here built one of these and can shed some light on the subject.

[Ryantothec]

Yellow and Black, Get yourself a YAK!!

[robertp17]

Looking for wings, lg, cowl, and wheel pants for the 88" EF extra if anyone knows where someone has a busted fuse and good wings let me know, thanks.

[Elvan Wilson II]

maidened mine today.
Real nice!

[Elvan Wilson II]

I have one I am going to convert to glow, I am thinking a Magnum .30 Four Stroke!
Should be a fun project.
Later's!

P.S. That makes 2! One Electric and the other will be glow!

[exeter_acres]

	Quote: Originally Posted by robertp17
	Looking for wings, lg, cowl, and wheel pants for the 88" EF extra if anyone knows where someone has a busted fuse and good wings let me know, thanks.

We carry and sell replacement parts....
Most listed here
http://www.extremeflightrc.com/store...index&cPath=17

If it is not on the web, just give us a call......we still probably have it.

Cheers
Curtis