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GROUP BUILD - Top Flite Giant Scale F4U Corsair

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GROUP BUILD - Top Flite Giant Scale F4U Corsair

Old 11-23-2015, 03:13 PM
  #10076  
rt3232
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Hay Pete
Looking at my X/miter I have 5% at full flap's and mine are on a 3 position switch, 1= up, 2= about 15 Deg's, 3= full flap's 45 Deg's and I am using a J/R match box to get the flaps right on.

Hope this helps

Cheers Bob T
Old 11-23-2015, 07:54 PM
  #10077  
Rocketman612
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Bob,
yes that helps. I'm running Futaba and have the Flaps on separate channels so it's a little easier to program. I too am using a 3 position switch (up, half , full deployment ).

Due to the poor flap installation I am only getting about 30 deg at full deployment and 12 deg at mid. that will have to be enough. I'm not ready to tear it all out to fix. I have gotten all the geometry issues sorted out and will have to replace both control horns on the inner flaps. So things are on hold till my order arrives in the mail.

Bob if it's not too late please add me to the "Brotherhood"

Thanks,
Pete
Old 11-25-2015, 06:37 AM
  #10078  
chandley43231
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working on the corsair will finish this winter yeee haa!!!
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Old 11-25-2015, 06:42 AM
  #10079  
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Originally Posted by chandley43231
working on the corsair will finish this winter yeee haa!!!
Old 11-25-2015, 06:48 AM
  #10080  
rt3232
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hi Chandly

Looks good, hope you post more pic's along the way to completion.

I did not like the plastic covering I had on mine so have been in a 2 winter re-do to f/g and paint

Cheers Bob T
Corsair Brotherhood # 6
Old 11-25-2015, 08:13 AM
  #10081  
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Originally Posted by chandley43231
working on the corsair will finish this winter yeee haa!!!
here is a video https://youtu.be/Afg954aNZK4
Old 11-25-2015, 03:02 PM
  #10082  
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here is another video https://www.youtube.com/watch?v=oSiFD6udAl0
Old 11-25-2015, 03:03 PM
  #10083  
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and one more video https://www.youtube.com/watch?v=eHUftn5xHMI
Old 11-25-2015, 03:07 PM
  #10084  
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need to get a frank tiano dummy engine with shipping it is 41$ ill need the weight in the front also talk to the guys at timya paints have to try there pannel line paint before i put on my clear coat will use buck shot epoxied for a bulk weight on the nose running four servos for my retract doors one each will wye haness an run with electrics on the single switch i can put a delay on my gear down an then an delay on doors closing on gear up its amasing what a futaba 18sz can do just love it guys

Last edited by chandley43231; 11-25-2015 at 03:11 PM. Reason: added info
Old 11-25-2015, 05:37 PM
  #10085  
rt3232
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Hay Chandly

I really like the detail your doing

I went with the soft mount and instead of the 3/8 ply I used piece of 7/16 cold roll steel and then had to take a big hole in the center to get the balance and the other good thing is the steel plate really dampens the engine vibrations ( G-62 mag ) don't know what engine your using, so with the Tiano cast engine in the cowl it dose give you some advantage.

I am hoping to get the paint done this winter so my bird is ready to fly come spring


Cheers bob T
Old 11-26-2015, 07:04 AM
  #10086  
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To all you rascals have a great thanksgiving
Cheers Bob T
Old 11-26-2015, 08:13 AM
  #10087  
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Originally Posted by Rocketman612
Been working on the flaps trying to get the geometry correct so they move together. There is a lot of binding and I will likely only get about 3/4 the travel without really working the HS 645's.

I'm about ready to program some down elevator mix when the flaps deploy. How much down have people been using?? I usually start at 5 or 7 and go from there.


Pete
None. Been flying mine for 3 seasons. No elevator mix with flaps.
Old 11-26-2015, 08:29 AM
  #10088  
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Originally Posted by tlroliff
None. Been flying mine for 3 seasons. No elevator mix with flaps.
Same here no elevator mix needed. Flaps are adjusted to move slow.

Last edited by jchorak; 11-26-2015 at 06:56 PM.
Old 11-26-2015, 09:40 AM
  #10089  
rt3232
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Hay guys I am not saying you cant fly this bird with out down elv trim.

For me I like the trim as it reduces the tendency to balloon, I have flown mine both ways, so as I see it it has to be your choice

Cheers Bob T
Old 11-28-2015, 03:12 PM
  #10090  
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Well It was Maiden day!!!!!!

Temp low 70's with some cross wind for late November in Lower Alabama it doesn't get much better.

Checked all controls twice. Tuned the G62 with a Xoar 22x8 prop, getting 6900 rpms. Radio check with engine off and on. Taxi testing all good
Lined her up and advanced the throttle, I was expecting a pull to the left and was feeding in rt rudder but she didn't and came off the rudder. Rotated nicely and climbed out at 3/4 throttle. Took several clicks of down elevator and a few clicks of rt aileron. Very stable in the air. Holding straight and level from 3/2 throttle to full.

Then I raised the gear and she started to climb at between 30 an 45 deg !! This surprised me as my TF 60 Corsair did not have any pitch change raising gear. I lowered the gear and she flew fine again. Made some low passes and didn't try deploying flaps. Set up for landing had a good sink rate and touched down a little fast on the mains got a bounce added throttle to smooth her out and got her in safely. Checked all the connections, servos,etc after a maiden and everything looked good.

I balanced the plane inverted wheels retracted at 5 3/4 in and added 22oz to the firewall. This plane flew twice with no added ballast by the previous owner with no bad tendency's however he never raised the gear on either flight.

Question: Is this normal or suggestive a problem with CG. One of our club members thought it was due to the loss of drag by raising the gear especially the tailwheel. Did anyone have similar behavior. If it's normal I could add a mix for down elevator when raising the gear.

Thanks,
Pete
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Old 11-28-2015, 04:03 PM
  #10091  
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Hay Pete aka Rocktman612

Both of my birds/Corsairs were balanced at 5 1/8 for the maiden's and after several flights I moved it back to 5 1/4, so with the geard down it flies a bit nose heavy but when the gear is up it flies great no up or down trim , But a lot has to due with how the wing and horizontal stab are set to the thrust line.
also if you have a bit of warshout in the tips.

If you would like I can go thru my old hand written notes and give you what I set mine at during the build

Cheers Bob T
Old 11-28-2015, 04:48 PM
  #10092  
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Bob,
Your confirming my thoughts that the CG is too far AFT.

I made this ballast box and bolted it to the firewall so I could easily add or remove weight.

Pete
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Old 11-28-2015, 07:39 PM
  #10093  
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Pete (Rocketman)
CONGRATS on your maiden
Old 11-29-2015, 10:11 AM
  #10094  
rt3232
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Pete
As you did not as for this info will just post it anyway The thrust line = the spine running along the sides of the fuse, wing at the root is set @ 1 deg positive incidence, horizontal stab @ 2 Deg's positive. when I put an incidence meter on the wing just out bd, of the gull it is at 0 and if I put my second one at the tip it reads 2 Deg's negative IE washout.

I could not see if your engine was on a soft mount, so the box looks like it should work

cheers Bob T
Old 11-29-2015, 01:00 PM
  #10095  
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Took advantage of the great weather today. My G62 is on a soft mount.

Added 8 oz of shot to the ballast box. Flight 1 takeoff good and gear down flight good. gear up and the pitch up was reduced by 2/3 and trimmed out. The gear up flight was very good. Speed great with the 22x8 Xoar. loops and rolls good. Put the gear down and dropped the flaps at 1/2 throttle she started to drop so flaps up. Landed.

Removed the down elevator mix to flap. Programmed some down elevator to gear retract.

Flight 2. in level flight at 60% throttle pulled the gear up and she flew straight and level. No pitch changes. Inverted flight took some down elevator so I believe the CG is good where it it. Dropped the gear and reduced power then dropped 1/2 flaps and she landed slower.

Flight 3 Takeoff flight good no trim changes made flying the pattern doing Immelmann's and Split S getting a feel for the plane. Tried landing with full flaps and will need some work got a bounce.

At this point I think I sorted out all the issues for CG and programming. 28 oz of shot for ballast and the box weighs 2.4 oz. Just need to practice and learn the Corsair and practice landing.


George,
If possible please add me to the Corsair Brotherhood


Thanks for the help,
Pete

Last edited by Rocketman612; 11-29-2015 at 04:48 PM.
Old 11-29-2015, 01:59 PM
  #10096  
rt3232
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Pete

My landings leave a lot to be desired, but I have found carry just enough speed to make a wheel landing and pull the power just before touch down, that has been my best so far.

Hope to have mine finished again for spring.

Cheers Bob T
Old 11-29-2015, 07:53 PM
  #10097  
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ALERT NEW BROTHER ALERT
LET'S ALL WELCOME " PETE ROCKETMAN612 " TO THE BROTHERHOOD
Pete your # 103
WELCOME TO THE BROTHERHOOD
The Brotherhood No Dues, No Rules, No Meetings, No Hassles,
Just a bunch of the Finest Fellows you may ever run across

George
CORSAIR Brotherhood # 1

Old 11-30-2015, 05:55 AM
  #10098  
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Originally Posted by rt3232
Pete

My landings leave a lot to be desired, but I have found carry just enough speed to make a wheel landing and pull the power just before touch down, that has been my best so far.

Hope to have mine finished again for spring.

Cheers Bob T
Bob,
Exactly. But I found that I was either high or low on the throttle. That sweet spot is a small target lol.

George,
Thanks for adding me to the Brotherhood.


Pete
Old 11-30-2015, 02:48 PM
  #10099  
rt3232
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[QUOTE=Rocketman612;12134316]Bob,
Exactly. But I found that I was either high or low on the throttle. That sweet spot is a small target lol.

Hear is what I have been playing with ( a sport bird ) flying straight and level, then pull the power back the get a steady rate of decent ( had my flying buddy mark the throttle position with a marker )
after landing with the bird on a run up bench we set a switch so that in the off position full throttle movement, but when the switch is in the on the marked position I get a flight idle, and then all I need is just a tad of up to flare and with the throttle stick back, all I have to do is flip the switch to off and the engine goes to full idle. been playing with this most of the last flying season, and it has worked fairly good now I will try to set this up on my Corsair for next season if I get the paint done
Note I am still using my OLD Futaba 8U so the programming is a big PITA on my 7c it is fairly easy

Hope this helps

Cheers Bob T

PS timing is everything
Old 11-30-2015, 07:28 PM
  #10100  
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Bob,

I have the same feature on my Futaba 12z. I may use it if I can't get it right consistently.

thanks,
Pete

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