Go Back  RCU Forums > RC Airplanes > Giant Scale Aircraft - 3D & Aerobatic
Reload this Page >

Extreme Flight 87" Yak 54 - Build & Fly

Notices
Giant Scale Aircraft - 3D & Aerobatic Discuss all your 3D & Aerobatic giant scale airplanes right here!

Extreme Flight 87" Yak 54 - Build & Fly

Old 03-18-2005, 09:16 AM
  #3351  
ten pillows
Senior Member
 
Join Date: Oct 2004
Location: , WA
Posts: 270
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Thanks for the info. I really have no excuse for my lousy preflight as I too was an aircraft mechanic in the Air Force. I worked on B-52's, C141A's, C-5A's and C130's. To anxious was my problem. The closer I got to finished, the more my pace picked up. Should have been the reverse. At least there was a happy ending, which provides me with a new opportunity for a better beginning. Kool...

ten pillows
Old 03-18-2005, 09:29 AM
  #3352  
Ricmussman
Senior Member
My Feedback: (24)
 
Join Date: Dec 2001
Location: Green, Ohio OH
Posts: 249
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

KARBONITE SERVO WARNING: Do Not! I repeat, DO NOT loctite the sheet metal screw on the new Hitec Karbonite geared servos. The loctite will react with the carbonite and weakens it to brittle plastic.

I had a 30% cap 232 with theses type servos on the wings, 2 per panel, and I used loctite. I was showing a friend how much travel I got on the alierons and I bump'd the alieron and it torqued it just a little, and the gear heads broke off[:@]. I called Hitec and they told me what had happened and sent me new gear trans. they said had i flown the plane i would have lost it[:-].

So to make a long story short, don't loctite karbonite geared servos. You really shouldn't be using any of those on this bird anyhow.
Old 03-18-2005, 09:41 AM
  #3353  
jrjohn
Senior Member
My Feedback: (24)
 
Join Date: Jan 2002
Location: stevens point, WI
Posts: 2,364
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I think the real problem with the bolts going through the firewall coming loose is because the wood squishes, I don't believe the washers were told to use on the back side are big enough, they should atleast have as much surface as the base of the standoff on the opposite side. I'm having special washers built today, I'll post a picture tonight. Also I'm having a custom choke arm built so I can pull from the bottom of the plane. However I'm not sure if it's going to work properly as the choke linkage may now contact the throttle linkage


John
Old 03-18-2005, 10:05 AM
  #3354  
Maudib
Senior Member
My Feedback: (51)
 
Maudib's Avatar
 
Join Date: Jul 2002
Location: Ashland, KY
Posts: 5,833
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I'm pretty sure they use the coarse thread screws to attach the arms and therefore do not require any loctite. Hitec makes a high end servo that uses Karbonite gears that should be perfcectly fine in big birds. In fact the tight lash would be a nice advantage.

For this size bird, we want the most torque we can get due to the single servo on each surface and therefor lean towards the metal gears... however on 35%+ with multiple servos, I'm not not sure that I wouldn't prefer the tighter lash with a small hit on torque.


ORIGINAL: Ricmussman

So to make a long story short, don't loctite karbonite geared servos. You really shouldn't be using any of those on this bird anyhow.
Old 03-18-2005, 12:53 PM
  #3355  
bodywerks
My Feedback: (4)
 
bodywerks's Avatar
 
Join Date: Dec 2004
Location: Elgin, AZ
Posts: 3,887
Received 58 Likes on 53 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

yup, course-threaded screw...running one in my Excelleron 90.
Old 03-18-2005, 01:15 PM
  #3356  
vertical ts
My Feedback: (50)
 
Join Date: Jul 2003
Location: new jersey, NJ
Posts: 208
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Do 8611 servos drop right in to the stabs,or do they need trimming?
Old 03-18-2005, 02:16 PM
  #3357  
wgeffon
Senior Member
My Feedback: (4)
 
Join Date: Dec 2001
Location: Bloomington, IL
Posts: 6,378
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

A tiny bit of material needs to come off the mounting brackett for the 8611 in the stabs.
Old 03-18-2005, 02:25 PM
  #3358  
car147
Senior Member
 
car147's Avatar
 
Join Date: Nov 2004
Location: Aviemore, UNITED KINGDOM
Posts: 113
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hi.

Quick question or two, my carb on the DA seems to be the opposite side around with the throttle and choke levers on the right side facing the engine from the front.

Do i just unbolt the carb and turn it round? or turn the carb and reed valve block?

Is it ok if the reed block is not turned to feed the breather pipe from the reed block to the top of the carb in it's new position?
Old 03-18-2005, 02:36 PM
  #3359  
jrjohn
Senior Member
My Feedback: (24)
 
Join Date: Jan 2002
Location: stevens point, WI
Posts: 2,364
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

We just had this discussion 2 days ago, Turn the carb but not the reed block, Thats straight out of the mouth of DA. GEt a longer pulse line
Old 03-18-2005, 02:45 PM
  #3360  
car147
Senior Member
 
car147's Avatar
 
Join Date: Nov 2004
Location: Aviemore, UNITED KINGDOM
Posts: 113
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Thanks.
Old 03-18-2005, 04:17 PM
  #3361  
Ricmussman
Senior Member
My Feedback: (24)
 
Join Date: Dec 2001
Location: Green, Ohio OH
Posts: 249
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Hey what about an Engine baffel? There is more air coming in than going out... I thought you were suposed to have 1:2. i.e. 10sq inches coming in 20sq inches going out....

What do you all think????
Old 03-18-2005, 04:25 PM
  #3362  
wgeffon
Senior Member
My Feedback: (4)
 
Join Date: Dec 2001
Location: Bloomington, IL
Posts: 6,378
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

My motor doesnt get hot.
No need IMO.
Old 03-18-2005, 06:35 PM
  #3363  
ten pillows
Senior Member
 
Join Date: Oct 2004
Location: , WA
Posts: 270
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I put em in my stabs with just a touch of trimming on the ends. Width is fine. Performance is spectacular!

ten pillows
Old 03-18-2005, 09:31 PM
  #3364  
eb542
Member
 
eb542's Avatar
 
Join Date: Oct 2003
Location: Ottawa, ON, CANADA
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Anyone familiar with the Toledo Ohio R/C Show? Do you know if anyone sells Smart-Fly equipment on-site? I know Smart-Fly will not have a boot but is there other Hobby Shops selling their stuff? Follow the link below for the complete list of exhibitors.

http://www.toledoshow.com/list.html

This will be my first time at this show.

Thanks.
Old 03-18-2005, 10:17 PM
  #3365  
coche
Senior Member
My Feedback: (4)
 
coche's Avatar
 
Join Date: Nov 2003
Location: NavojoaSonora, MEXICO
Posts: 246
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

www.airwildpilotshop.com

they sell smart-fly products also! talk with Doring!

how are you doing with your yak Carlos Roman???
Old 03-18-2005, 10:42 PM
  #3366  
jrjohn
Senior Member
My Feedback: (24)
 
Join Date: Jan 2002
Location: stevens point, WI
Posts: 2,364
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Ok, here it is.

1. custom made alluminum washers that match the diameter of the standoffs. This should cut down on the plywood squish when tightening down the engine, and they won't cup or distort. 1/4-20x3/4 buttonhead hex bolts

2. Custom made choke lever. This trick little item will alow me to operate the choke from the bottom of the cowl.

It's nice to have a brother who is an engineer/ machinist

DA could go one step further and provide these items for very little cost and make their engine and standoffs complete. I'd be happy to send them the 3D drawing of the choke lever if they asked me. It takes 5 minutes to install

john
Attached Thumbnails Click image for larger version

Name:	Zx72266.jpg
Views:	10
Size:	15.3 KB
ID:	245845   Click image for larger version

Name:	Rm38826.jpg
Views:	11
Size:	15.0 KB
ID:	245846   Click image for larger version

Name:	Yd83256.jpg
Views:	10
Size:	15.4 KB
ID:	245847  
Old 03-18-2005, 10:51 PM
  #3367  
wgeffon
Senior Member
My Feedback: (4)
 
Join Date: Dec 2001
Location: Bloomington, IL
Posts: 6,378
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Very nice!

John,

Can he make some of those aluminum washers that a 6-32 socket head bolt will fit into?
I need some for the canopy on my Carden.
Old 03-18-2005, 11:15 PM
  #3368  
jrjohn
Senior Member
My Feedback: (24)
 
Join Date: Jan 2002
Location: stevens point, WI
Posts: 2,364
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: wgeffon

Very nice!

John,

Can he make some of those aluminum washers that a 6-32 socket head bolt will fit into?
I need some for the canopy on my Carden.
Wayne I can picture in my mind the perfect washer. Tapered simular to my washers with a steped hole so the head of the hex head bolt nest in the washer, and the top of the bolt will be flush with the top of the washer when tightened down. What diameter would work best?

Yes I'm sure Tom can make anything, and he'll do the favor for me if I ask him. Won't have time untill the end of april. My wedding is in two weeks down in Fla. then after that he's going on vacation to CA.

john
Old 03-18-2005, 11:26 PM
  #3369  
wgeffon
Senior Member
My Feedback: (4)
 
Join Date: Dec 2001
Location: Bloomington, IL
Posts: 6,378
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

ORIGINAL: jrjohn



Wayne I can picture in my mind the perfect washer. Tapered simular to my washers with a steped hole so the head of the hex head bolt nest in the washer, and the top of the bolt will be flush with the top of the washer when tightened down. What diameter would work best?


Exactly.
The base diameter isnt that important. I back it up with a rubber washer that goes between the plane and the metal washer.
The builder of the plane swears that he didnt use them or supply them to the first owner of the plane. The guy I bought the plane from swears he got them from the builder..

Long story short, I lost one and cant find a replacement.
I'd buy 4 or 5 from him. Just let me know.

Attached Thumbnails Click image for larger version

Name:	Qo39059.jpg
Views:	11
Size:	118.1 KB
ID:	245867  
Old 03-18-2005, 11:30 PM
  #3370  
jrjohn
Senior Member
My Feedback: (24)
 
Join Date: Jan 2002
Location: stevens point, WI
Posts: 2,364
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Wayne, I still need a diameter. Probably best if it matched the Dia. of the rubber washer.
Where did the washers you were using (and lost one) come from. Custom made? or production??

John
Old 03-18-2005, 11:36 PM
  #3371  
wgeffon
Senior Member
My Feedback: (4)
 
Join Date: Dec 2001
Location: Bloomington, IL
Posts: 6,378
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

ORIGINAL: jrjohn

Wayne, I still need a diameter.
Its 9/16" I just measured it.

Where did the washers you were using (and lost one) come from. Custom made? or production??
Nobody knows....

ORIGINAL: wgeffon
The builder of the plane swears that he didnt use them or supply them to the first owner of the plane. The guy I bought the plane from swears he got them from the builder..
Old 03-19-2005, 12:04 AM
  #3372  
jrjohn
Senior Member
My Feedback: (24)
 
Join Date: Jan 2002
Location: stevens point, WI
Posts: 2,364
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Ok Wayne, I'll see what we can do for you. What do other Carden planes use in this application?
Old 03-19-2005, 12:05 AM
  #3373  
wgeffon
Senior Member
My Feedback: (4)
 
Join Date: Dec 2001
Location: Bloomington, IL
Posts: 6,378
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: jrjohn

What do other Carden planes use in this application?

They just have a 6/32 bolt that gets recessed into the fuse side.
Old 03-19-2005, 12:08 AM
  #3374  
jrjohn
Senior Member
My Feedback: (24)
 
Join Date: Jan 2002
Location: stevens point, WI
Posts: 2,364
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

OK, I"m sure we can do something for you if you can wait. I made some notes for the future.

john
Old 03-19-2005, 12:10 AM
  #3375  
wgeffon
Senior Member
My Feedback: (4)
 
Join Date: Dec 2001
Location: Bloomington, IL
Posts: 6,378
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Thanks John.

I am in no rush.
I hardly ever fly that plane.

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.