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Extreme Flight 87" Yak 54 - Build & Fly

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Extreme Flight 87" Yak 54 - Build & Fly

Old 10-13-2005, 09:09 PM
  #6151  
bpryor
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

ORIGINAL: rdb127

All I know is, If I ever need an RCU lawyer, can I get Bill Bryor to defend me?
Sure, as long as you pay me with an EF Yak.

Old 10-14-2005, 01:17 PM
  #6152  
Aerohead
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

rdb127,

Be careful with the throw settings on the transmitter. According to Troy Built Models, the throws at the transmitter should not be set over 120% when using the Hitec 5955 TG. I have copied their cautionary note below. Apparently any setting over 120% causes problems.


Stand back! This is the most powerful servo in its class.
Hitec recommends 6v for giant scale use.
Do not use travel adjustments higher than 120%.


I don't understand why this warning is not plastered all over every Hitec ad.
Old 10-14-2005, 01:29 PM
  #6153  
Maudib
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

120% might be so on JR... but on Futaba? No more than 100% INCLUDING any mixes you might have...

Usually you can't set it to more than 50-60% anyway due to it's default 180 degree throw...
Old 10-14-2005, 01:50 PM
  #6154  
jrjohn
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: Aerohead

rdb127,

Be careful with the throw settings on the transmitter. According to Troy Built Models, the throws at the transmitter should not be set over 120% when using the Hitec 5955 TG. I have copied their cautionary note below. Apparently any setting over 120% causes problems.


Stand back! This is the most powerful servo in its class.
Hitec recommends 6v for giant scale use.
Do not use travel adjustments higher than 120%.


I don't understand why this warning is not plastered all over every Hitec ad.
AHead, are you sure your not talking about the 5995TG?
Old 10-14-2005, 01:57 PM
  #6155  
stomper
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: Maudib

120% might be so on JR... but on Futaba? No more than 100% INCLUDING any mixes you might have...

Usually you can't set it to more than 50-60% anyway due to it's default 180 degree throw...
FWIW all I use is JR and can tell you I have not come across a JR servo that could not handle the 150% and I have a lot of them>
Old 10-14-2005, 02:42 PM
  #6156  
Richard D Bahmann aka/Wrongway
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Thanks Arrowhead. I never saw that warning and even checked my instruction booklet that came with the servo. Perhaps it is something that the added at a later date. Although my servo has never been the air it was bought last December from Tower Hobbies.
I will reset the throws and check it again.
Old 10-14-2005, 03:35 PM
  #6157  
bpryor
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

ORIGINAL: Aerohead

rdb127,

Be careful with the throw settings on the transmitter. According to Troy Built Models, the throws at the transmitter should not be set over 120% when using the Hitec 5955 TG. I have copied their cautionary note below. Apparently any setting over 120% causes problems.
I have never heard that before. Though Gene typically knows what he's talking about, I checked in the Hitec support forum and could not find anything on limiting travel for the 5955. Here's a semi-relevant bit of info from Mike Mayberry:

"The only difference between the 5995 and 5955 is the lack of the heatsink case and travel. The 5995 is set for 180 degrees of travel so you should use the programmer to reduce this and not the radio or you will lose resolution. "

This may be part of the confusion.

BTW, I have a 5955 on my rudder and it is set to 140%, and so far I have not had any issues.
Old 10-14-2005, 10:02 PM
  #6158  
Josey Wales
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Can I use 1 1/2" SWB arms for the Ailerons? I ordered the wrong size instead of 1 1/4"[:'(]
Old 10-14-2005, 10:04 PM
  #6159  
wgeffon
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Joe,

Sure but just use the holes that are 1" from the output shaft on the 1-1/2" arm.
Old 10-14-2005, 10:09 PM
  #6160  
Josey Wales
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Ok so after a quick measure that looks like the second hole from the output shaft...Thanks!
Old 10-14-2005, 10:20 PM
  #6161  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Yup.
Old 10-14-2005, 10:29 PM
  #6162  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Thanks Wayne..
Old 10-14-2005, 10:33 PM
  #6163  
wgeffon
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

No problem.


I am finally going to get out and fly my Yak on Sunday now that IMAC season for us is over.
Cant wait!
Old 10-14-2005, 10:40 PM
  #6164  
Josey Wales
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Sounds great! I prolly wont get to fly mine for awhile but Im not in a huury...yet!

Ya know before I asked about the arms I matched the supplied CF arm against the SWB arm..In the manual it says to use the second hole on the CF arms for the ailerons..When I matched it up to the SWB arm the last 2 holes matched up perfectly with the 2 holes on the CF arm ! I was all set to just use the 3rd hole from the output shaft (the second one in from the end)..good thing I didnt [X(]
Old 10-14-2005, 10:44 PM
  #6165  
wgeffon
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Not a big deal if you did but you'd have more ail throw than needed.

I flew one guys EF Yak that had 80 degrees of ail throw in each direction. Fun, but at the extreme throw they blew back a little if the plane had any speed on it.
Old 10-14-2005, 10:51 PM
  #6166  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

80 degrees!! LOL![X(]

Ya think it would stress the servo too much buy using the 3rd hole and just dialing back the throw?
Old 10-14-2005, 10:59 PM
  #6167  
wgeffon
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

The geometry is set for 1" or 1-/14 ( I dont remember exactly which)
Why mess with it.

Your also going to lose resolution by dialing back the travel.
Old 10-15-2005, 07:33 AM
  #6168  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Oh yea..forgot about that!![8D]
Old 10-15-2005, 08:40 PM
  #6169  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I'm thinking about getting the EF Yak (when they come in). I have a 3W 60 (24x10) that pull's a 19 pound plane out of sight straight up (in Denver). Will the prop have ground clearance on that Yak? Will the 3W 60 be too heavy up front? Talk to me guy's. RV
Old 10-15-2005, 08:51 PM
  #6170  
wgeffon
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Whats the weight difference between that and a DA-50?
If its not too much more go for it.

The Yak has no trouble with prop clearance. I was using a 24" prop without any trouble.
Old 10-15-2005, 09:09 PM
  #6171  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: wgeffon

Whats the weight difference between that and a DA-50?
The 3W-60 weighs about 2 lbs more than a DA-50....maybe even a bit more.
Old 10-15-2005, 09:11 PM
  #6172  
wgeffon
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly



ORIGINAL: bpryor


The 3W-60 weighs about 2 lbs more than a DA-50....maybe even a bit more.

[X(]

Oh... Maybe not such a good idea.
Old 10-15-2005, 09:14 PM
  #6173  
RVBlack
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I was just about to say a full 2 lbs. more. RV
Old 10-15-2005, 09:27 PM
  #6174  
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

that 3W 60 is currently on a 27% edge540 with 1164si. of wing with a span of 81inches and I'm flying it hard. Fast wall's, hover's, slow high A knife edges, and more. I just thought it would do better on that bigger Yak.
Old 10-15-2005, 09:38 PM
  #6175  
wgeffon
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Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Rv,

With that motor on the Yak plan on the plane being just shy of 18 pounds.
With that being said, your wing loading will be around 28.5 oz/sqft. Not bad but not like the amazing wing loading of 24 that we are seeing with this plane.

Nobody says you have to have a DA in this plane. Use what you have and have fun.


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