Extreme Flight E Yak vs Extra

[Stainless Skills]

Turns out atlanta hobby has the airboss 45 amp esc's out of stock so I just emailed them and told them to ship the yak with a castle creations phoenix 45 amp esc instead.

Do you all think this is a good choice?

[Diablo2006]

Should have just ordered the Airboss speedo and the plane etc direct from Extremeflight.

[Freddy Warbird]

	Quote: Originally Posted by Stainless Skills
	Turns out atlanta hobby has the airboss 45 amp esc's out of stock so I just emailed them and told them to ship the yak with a castle creations phoenix 45 amp esc instead. Do you all think this is a good choice?

The CC 45 works. I just don't care for the throttle res, and the weird things CC ESC's sometime exibit.

[BR289]

Anyone know what covering is used and where/what brand will match? I've got a small hole on my stab ( something fell on it )?

[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…………?

[bigbarper]

I have the Yak with a Hacker A30-14L and an X40 esc.
With a flight power 2500 3s pack and a 14 x 7 prop I am getting 424w at 38A which is giving heaps of performance for my EF yak 54 weighing in at 40oz.
However I am no expert but I am getting serious wing rock whilst trying to harrier, any of you pros got any set up ideas that might help, it is rock steady in an elevator, cg right in the middle of recommended range.
Thanks

Phil.

[Stainless Skills]

I have a 30% yak with several different props.

On a PT 22X10 the harrier suckes and it wing rocks like crazy. On a NX 22X8 and a PT 23X8 the harrier is tons better.

I think a prop combination coupled with the cg and an up and right thrust all effect the harrier. I would try changing props after the center of gravity.

When I was learning how to harrier I would just hold back on the elevator and get the nose up but would always have wing rock, there is more to the harrier than just bringing the nose up, you have to have some planes in limbo between a hover and a 45 degree AOA, remember to keep the nose high that helps allot.

[plaster93]

This place has almost the same Yak as EF and looks better and cheaper!
http://www.3dhobbyshop.com/NewARFs.aspx

[Stainless Skills]

those look cool, any pictures of the insides or video's of flying.

If I have some sort of totally unforseen disaster of a crash I might need a new one......

[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.