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 05-19-2005, 12:07 PM
  #4951  
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

I have used the crank pressuere on bigger engines, I havent tried on a DA-50, this is the frist time a plane this size can accualy use smoke and still fly great!
this is all you need to make the smoke work:

http://www2.towerhobbies.com/cgi-bin...?&I=LXZ674&P=7

I am not using this sistem any more, as smoke rate changes a lot with throtle, I am using the smoke pump by 3W now on my 35% Extra, very simple, it runs on your RX battery! you dont have to add another battery for smoke!

http://www.cactusaviation.com/Produc...oke/smoke.html
Old 05-19-2005, 12:18 PM
  #4952  
BBriBro
My Feedback: (2)
 
Join Date: Apr 2002
Location: Independence, KY
Posts: 638
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: coche

this is all you need to make the smoke work:

http://www2.towerhobbies.com/cgi-bin...?&I=LXZ674&P=7
I've tried that system too, It looks identical to the one Du-bro used to make, it just pinches the line, which takes a bit of force from the servo, it's .......well............cheap. The Bennett valve is very nice, [link=http://www.bennettbuilt.com/smoke.htm]B&B smoke valve[/link] I never did have one leak, all machined aluminum, double o-rings, But I think all these mechanical systems are kinda obsolete with the newer electric pumps and lightweight lithium batteries.
Old 05-19-2005, 02:42 PM
  #4953  
SPACE SCOOTER
Member
 
Join Date: Mar 2005
Location: Knoxville, TN
Posts: 58
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Bodyworks, Thanks for the info on the Quite Pipe. I'm going ahead with my original plan, a KS1060 tuned pipe..Thanks again, Scooter
Old 05-19-2005, 03:40 PM
  #4954  
flyingcrazy
Senior Member
My Feedback: (28)
 
Join Date: Sep 2003
Location: crandall , GA
Posts: 338
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Here is how I did my choke I made a bracket out of 1/16 fiberglass sheet used carbon push rod and JB WELDED a short piece of 2-56 all thread and one of the cowl gromets and a 2-56 ball link hooked up to the choke arm it works great .
Attached Thumbnails Click image for larger version

Name:	Ca81335.jpg
Views:	11
Size:	52.0 KB
ID:	273713  
Old 05-19-2005, 03:43 PM
  #4955  
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

Flying Crazy,

Brilliant work. I'm gonna have to borrow that piece of ingenuity.

-J. David
Old 05-19-2005, 05:42 PM
  #4956  
jeang
Senior Member
 
jeang's Avatar
 
Join Date: Sep 2003
Location: Dubreuilville, ON, CANADA
Posts: 172
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Flying Crazy,I did it exactly like you exept I use aluminium for the little bracket.very simple and works great.


jeang
Old 05-19-2005, 05:53 PM
  #4957  
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: Maudib

Flying Crazy,

Brilliant work. I'm gonna have to borrow that piece of ingenuity.

-J. David
David, there is a simular choke setup earlier in this thread. It uses one of the CF servo arms for a braket (if you didn't use them) it pulls straight instead of at an angle. I think it's a touch cleaner and you don't have that long rod hanging out there subject to vibration

John
Old 05-19-2005, 06:02 PM
  #4958  
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

Cool... I musta missed that... this thread only grew 100 pages or so whilst I was in the hospital...

PM the pic of it if you still have it...

My choke runs inside the plane and the hatch is left off till it pops then it's put on... may switch it around as sometimes I go an hour before flying again and I have to rechoke...
Old 05-19-2005, 06:09 PM
  #4959  
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

David it was probably posted while you were in the Hosp. I'll try to dig it up for you

John
Old 05-19-2005, 06:13 PM
  #4960  
flyingcrazy
Senior Member
My Feedback: (28)
 
Join Date: Sep 2003
Location: crandall , GA
Posts: 338
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

There is always someone with a better mouse trap . The angle is needed so it want be behind the spinner I used a groment and a carbon push rod to keep vibration down .
ORIGINAL: jrjohn

ORIGINAL: Maudib

Flying Crazy,

Brilliant work. I'm gonna have to borrow that piece of ingenuity.

-J. David
David, there is a simular choke setup earlier in this thread. It uses one of the CF servo arms for a braket (if you didn't use them) it pulls straight instead of at an angle. I think it's a touch cleaner and you don't have that long rod hanging out there subject to vibration

John
Attached Thumbnails Click image for larger version

Name:	Hf97900.jpg
Views:	12
Size:	32.1 KB
ID:	273758  
Old 05-19-2005, 06:30 PM
  #4961  
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

Drew and I posted the Choke thing way back when we built his.

One single peice of heavy NyRod that extends forward to just behind the spinner.
Its held in place by a tie wrap that attaches to the nyrod and the red ignition wire. Simple.
Old 05-19-2005, 09:34 PM
  #4962  
jeang
Senior Member
 
jeang's Avatar
 
Join Date: Sep 2003
Location: Dubreuilville, ON, CANADA
Posts: 172
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Thats were I got the idea,I stoll it from you and Drew,but installed a small plate to hold the nyrod.

jeang
Old 05-19-2005, 11:13 PM
  #4963  
turbo4
Senior Member
My Feedback: (3)
 
turbo4's Avatar
 
Join Date: Jul 2004
Location: borden, IN
Posts: 163
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

I have finally got a motor and I have a few questions.....

1. flip the carb but not the reed block.... so that the fuel line will wrap from top to bottom(between the carb and reed block)?
2. Upon reinstalling the 2 bolts that hold the carb/reed to the motor use loctite?
3. Use the spring on the throttle lever or disconnect?

Thats probably not all my questions but until I hit "submit the post" thats all I can think of......

Thanks, Joel
Old 05-19-2005, 11:39 PM
  #4964  
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

Joel:

1.- yes
2.- yes
3.- disconect the throtle spring
Old 05-20-2005, 07:46 AM
  #4965  
NE0
My Feedback: (9)
 
NE0's Avatar
 
Join Date: Jul 2002
Location: Newark, OH
Posts: 1,194
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Joel:

1.- yes
2.- yes
3.- disconect the throtle spring
3. Disconnect from the throttle arm, but don't "remove" entirely from the armature
Old 05-20-2005, 08:16 AM
  #4966  
turbo4
Senior Member
My Feedback: (3)
 
turbo4's Avatar
 
Join Date: Jul 2004
Location: borden, IN
Posts: 163
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

Thanks for the answers.....I did understand to leave the spring on the arm. More questions:

1. Tygon, 1/8" ID or 3/32? I noticed the piece that came on the motor(between the carb and reed) was 3/32".

2. For those that did a firewall reinforcement, did you use longer bolts than 1/4 20 x 3/4 for firewall to standoff? I opted to add the 1/8" ply doubler. looks like that plus washers is gonna leave very little threads usable. It also appeared that just below the tri-stock on the front bottom firewall there was a hairline fracture in the firewall. Not sure, but since it was an area of concern I went ahead and beefed it up.

3. Any need to add large washers between the standoffs and firewall on the front side?

Thanks Again, Joel

Old 05-20-2005, 10:57 AM
  #4967  
bodywerks
My Feedback: (4)
 
bodywerks's Avatar
 
Join Date: Dec 2004
Location: Elgin, AZ
Posts: 3,875
Received 58 Likes on 53 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

1. I used 1/8 and soldered on some Dubro 1/8 fuel barbs on my tank lines for a snug fit. The barbs are necessary if you use the 1/8. I don.t see why you wouldn't be able to use 3/32 uneventfully, though, as the larger nitro engines burn twice as much fuel and get away with it. However, most of them run some sort of positive pressure in the tank, whereas this is strictly vented...go with the 1/8.
2and3. Haven't done the firewall mod - mine is still fine. I simply soaked the ply with thin CA around the holes to stiffen the wood up, which worked really well, and then, instead of cranking down the bolts unnecessarily, I snugged them up and safetywired them - see pic below. If you are still doing it the other way, then yes, washers on the screw and standoff side is a good idea.
Attached Thumbnails Click image for larger version

Name:	Fc90385.jpg
Views:	11
Size:	37.7 KB
ID:	273978  
Old 05-20-2005, 06:41 PM
  #4968  
JWilliams
My Feedback: (6)
 
Join Date: Dec 2001
Location: Georgetown, IN
Posts: 1,515
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly


ORIGINAL: turbo4

Thanks for the answers.....I did understand to leave the spring on the arm. More questions:

1. Tygon, 1/8" ID or 3/32? I noticed the piece that came on the motor(between the carb and reed) was 3/32".

2. For those that did a firewall reinforcement, did you use longer bolts than 1/4 20 x 3/4 for firewall to standoff? I opted to add the 1/8" ply doubler. looks like that plus washers is gonna leave very little threads usable. It also appeared that just below the tri-stock on the front bottom firewall there was a hairline fracture in the firewall. Not sure, but since it was an area of concern I went ahead and beefed it up.

3. Any need to add large washers between the standoffs and firewall on the front side?

Thanks Again, Joel

I guess you do not like my answers. Jeff
Old 05-21-2005, 03:27 PM
  #4969  
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

Somebody was asking earlier about using a 5945MG hitec on the rudder. I'm using one while I'm waiting for a 5955 Hitec. (3 months now) Anyway, the 5945 does not have enough power to properly maintain this aircraft. It's probably OK for family flying, but thats about it.

John
Old 05-21-2005, 04:19 PM
  #4970  
cadconversions
Senior Member
My Feedback: (21)
 
cadconversions's Avatar
 
Join Date: Jan 2004
Location: Scottsville, KY
Posts: 1,242
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Extreme Flight 87" Yak 54 - Build & Fly

You must mean the 5945MG doesn't have enough power. If you mean the 5955TG than we are all in trouble.
Old 05-21-2005, 04:23 PM
  #4971  
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

John, 5955 does not have enough power? I think you wanted to say that the 5945! why do you think that the 5945 wont maintain this aicraft? I have flown this plane with 5945 with out any problems! knife edge its perfect, knife edge loops are also awsome!
Old 05-21-2005, 06:20 PM
  #4972  
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

jose, yes I ment the 5945 does not have enough power on my rudder. I fixed the typo. On my aircraft I can't get full deflection if I have any significant speed

John
Old 05-22-2005, 12:13 AM
  #4973  
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

well, might be some current loss, or something like that, what kind of regulators do you have? I am using 16awg wire from the battery to the regulator and 2 22awg wires from regulator to reciver!
I am sure my ruder servo its working perfect as I had to dial more exponential on my ruder as I was geting in to a hover when I was trying to knife edge flight! I really dont fly much with speed as I like to fly my plane 3D almost all the time, but I do make some manuvers with some kind of speed and using the ruder I do get full deflection..
Old 05-22-2005, 07:18 AM
  #4974  
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

SmartFly Reg. 4800 mah Fromeco. All heavy stuff. If you had problems going into a hover from a knife edge, then your talking about flying awful slow. One thing I just thought of. I never did any adjustments to my SmartFly regulator. Possibly it doesn't come set at 6 volts from the factory???

John
Old 05-22-2005, 09:54 AM
  #4975  
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

if you have the adjustable regulators from smart-fly I think they are set for lower voltage... contact robert ritchey from smart-fly and ask him, my regulators are set for 6 volts...

I do like to fly really hi alpha knife edge, but I was having that problem eaven with more speed, I was having that problem at the entry of the knife edge.. but exponential fixed that problem!!

Thread Tools
Search this Thread

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

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.