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Top Flite 1/7 P-51 Build

Old 04-09-2008, 05:45 PM
  #1601  
Live Wire
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Default RE: Top Flite 1/7 P-51 Build

Where do you have your battery and can you shift your servos[:@] man that is a lot of weight[:@]
Larry K
Check and see how far foward the balancing point moves it can be flown nose heavy but takes out landing gear[:@]
Old 04-09-2008, 09:22 PM
  #1602  
bull51
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Default RE: Top Flite 1/7 P-51 Build

Unfortunaltely, I'm having difficulty putting the batts. where I want them due to the tailwheel servo. They are going right against F-8 which is as far back as i can go without cutting holes. I cut a battery stick pack and made it round to fit it in. I'm afraid my options are very limited at this point. In hind sight, I should have done some balancing prior to covering. I'd mount a battery in the tail, then.
Old 05-23-2008, 07:27 PM
  #1603  
Live Wire
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Default RE: Top Flite 1/7 P-51 Build

Just thought I would bring yhis thread back up to see if any one is still around Still have not received my struts, took the Out Law off the nose what a difference
Old 05-23-2008, 08:07 PM
  #1604  
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Default RE: Top Flite 1/7 P-51 Build

For the record, I'm still interested.... Keep it coming...

I had a similar CG issue with my H9 SPitfire.. Part of it was that I had not measured to the CG point accurately... I had to move my rx battery pack back (as you did) and added a 2nd battery pack for the retracts. That seems to have cured it but I won't be able to test fly it till Monday... bummer.

Bob
Old 05-24-2008, 09:49 PM
  #1605  
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Default RE: Top Flite 1/7 P-51 Build

Well the struts came in After all this time. Yee Ho great bals of fire.
2 L's In Ball's
Old 05-24-2008, 09:55 PM
  #1606  
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Default RE: Top Flite 1/7 P-51 Build

Think positive are they the right ones[:@]??
Old 05-29-2008, 11:36 PM
  #1607  
TeamMuir1
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Default RE: Top Flite 1/7 P-51 Build

WEll I have blood shot EYES.. from reading this entire thread took me 2 days... lol
but I did and I Am so interested in this THREAD... I have had my TF P-51 posted on the front page of
RCU last year.. it was Awsome seeing it posted ... lol
had alot a guys contact me HEY your plane is on the Front PAGE it was GREAT..
you all keep up the GREAT work......
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Old 05-31-2008, 03:44 AM
  #1608  
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Default RE: Top Flite 1/7 P-51 Build

If there is anyone still around and involved with this thread PLEASE post ....
I would like to know were you all ended up with your CG
and tell how much did the P-51's weigh?
Old 05-31-2008, 07:07 AM
  #1609  
N1EDM
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Default RE: Top Flite 1/7 P-51 Build

I'm still lurking, FYI... This is one of my future projects, just getting tips for now. I'm also hoping that this thread stays alive.

Bob
Old 06-01-2008, 12:33 PM
  #1610  
Redwulf__34
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Default RE: Top Flite 1/7 P-51 Build

Finally! I've been reading for day's!!!!! I think it took me longer to read this thread than it would have taken me to build one! But at least now I know how to build one!

Now I also know where you've been hanging out Bob!! Is your's still on the shelf?

There is a ton of great stuff in here. What's the wingspan on this one? I built the old Top Flite P-51 and bought the conversion kit to make it a "D" model. I still have the box! I built it in the early/mid 80's when I was an early teen.

It's covered and painted but I ran into hic-cups trying to get an exhaust on the Supre Tigre for it. I think it must be smaller than this one you guys are building. I'm starting to get back into R/C now and I'm finishing up an Ugly Stick that I scratched to get me started again. I thought about finishing the Mustang up next then venturing into some Giant Scale. You gotta love the Mustang!!

Sean
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Old 06-01-2008, 01:29 PM
  #1611  
skyriter
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Default RE: Top Flite 1/7 P-51 Build

The current Gold Edition P51 has a wingspan of 65", length of 56.5, wing area 734, weight 8 to 10. I started mine about 3 years ago and so far have the wing built with the retracts installed, but still have to sheet the wing. Have the tail feathers built. Got into larger planes (28% gas) shortly after starting this project, so this has sort of stalled.

Yes... there is a lot of info in this and takes a lot of reading. You need to book mark the parts that have some good pictures etc.

Bruce
Old 06-01-2008, 03:00 PM
  #1612  
TeamMuir1
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Default RE: Top Flite 1/7 P-51 Build

I would like to know for the ones that have flown there P-51
were is the best CG the plans state 3 and 7 eights inches back ..
but I will tell you that does not work for me .
so I guess I will look into doing the math !!! lol....
any help or an ADDY to another thread?
thanks Guys.
Old 06-01-2008, 05:09 PM
  #1613  
TeamMuir1
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Default RE: Top Flite 1/7 P-51 Build

Hey Guys I have found this web sight for CG calculations I came up with 5 inches back I have flown mine set there before with a
16 onz tank toped off.
here is the web sight and what do you all think ?
http://www.geistware.com/rcmodeling/cg_super_calc.htm
Old 06-01-2008, 05:42 PM
  #1614  
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Default RE: Top Flite 1/7 P-51 Build

Mine has a wingspan of 60", Wing Area 608 Sq, and weight 5-1/2 to 6-1/2 lb. That extra 5" on ya'lls would be have been big. I always felt mine was small. "no jokes!"

I hesitate to post any pictures of it here. You all have built such nice Ponies! I built mine when I was 13-14 years old or so. I can't remember anymore. I painted it with Automotive Enamel. It still has some painting left to do. The flat black on top in front of the canopy, the spinner, and canopy itself. I was too young to understand scale details. I wish I could find this paint scheme again. It was a photo Recon F-6D, I changed the white to silver, the green areas to red, because I liked red better! But the pattern and all else are correct. Just wrong colors. I can't find the book I had anymore. But this Pony was unique in that it was white and not bare metal. I wished I had held the details better. But what the heck i was young.

My dad has a forge and makes damascus knives. This thing has sat for 25+ years in that garage. It has gotten some real bad spots on it. I guess all the high temps then low temps etc. The tail feathers, ailerons, flaps have swollen and don't move well. It's never been flown. I wanted to finish dressing her up and fly it but it would take so much I figure I might as well start over.

Another big difference was my vertical fin and horizontal stabs were not built up like yours. They were just 1/4" balsa. I didn't have any preformed pieces either. The scoop, the cowl all had to be carved. I wished I had a formed scoop sooooo bad!!! I did put retracts in. I pulled the old Rhom Air's from my Dirty Birdy Pattern plane. If my memory serves me correctly the my plans didnt' show a retract installation or flaps. I had to figure all those out myself.

Sean
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Old 06-01-2008, 08:21 PM
  #1615  
BradSD
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Default RE: Top Flite 1/7 P-51 Build

Hello guys,
I been away from this thread a couple years. Does anyone know if Zope or Intermidiate finished their planes. When I get time I will have to go back and catch up.
Later,
Brad
Old 06-01-2008, 08:30 PM
  #1616  
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Default RE: Top Flite 1/7 P-51 Build

Hey BRAD how are you ?
I am a Kentuckian As Well..
I am south of Louisville and North of Shepherdsville lol
I have you been flying your P-51?
Old 06-03-2008, 12:43 PM
  #1617  
bull51
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Default RE: Top Flite 1/7 P-51 Build

Well hello again everyone! Good to see some of us are still here.

TeamMuir1,

About the center of gravity, what issues did you have with the CG set to the plans specs? I just put a Spit Fire together to practice before taking the Mustang up for th first time. She kept nosing over on take-off !!???? Nose heavy, maybe? I had to keep full up elevator to get it airborne ( I know I should not have even tried to get her airborne, but I did ). When I finally got it in the air, it was uncontrollable. Landed it in the weeds to soften the blow. She survived with a couple of nicks, but now I'm scared to death to take the Mustang out.

However, I plan to do a maiden flight this friday, if the weather cooperates. It will be video taped, but I must say, if it goes as poorly as the spit fire, I'm not too sure I can handle posting it here.
Old 06-03-2008, 01:53 PM
  #1618  
skyriter
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Default RE: Top Flite 1/7 P-51 Build

A lot of scale tail draggers do not have the main gear foreward far enough and tend to nose over on the runway. I found that with the Gold Edition P51. I used photos of the full size to figure out where the axle should be. Ended up tilting the wheels forward about 1/2" to be at the leading edge or ahead of the leading edge. As it came out of the box, it was behind the leading edge. Taking off from pavement may be OK, but grass field would be a problem.

I would hope that the plan CG would be close... these are pretty old kits.

Bruce
Old 06-03-2008, 06:12 PM
  #1619  
bull51
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Default RE: Top Flite 1/7 P-51 Build

I thought most of the nose over issues were upon landing, not take-off. Has anyone had nose over on take off? If so, how did you fix the problem?
Old 06-03-2008, 06:36 PM
  #1620  
Live Wire
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Default RE: Top Flite 1/7 P-51 Build

Bull
It is the wheels are not rolling free. Like applying the brakes.
And even causes the same problem on landing[:@]
Old 06-03-2008, 09:12 PM
  #1621  
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Default RE: Top Flite 1/7 P-51 Build

Well this is a bummer.
I have been fighting this retract system where it was driving me nuts. I have changed every thing and what did I find [:@] The two systems are not working to gether. One closes more than the other which give a different travel and throws every thing out of whack. Could not get the wheels to fit doors would not close . You would not believe what I have changed to get it to fit.
Well the moral of the story is have every thing you need for this plane and make sure it fits before you finish the plane. It is hell cuting into a finished plane to change mounts on retracts.[:@][:@]

Letter left out
Old 06-03-2008, 09:41 PM
  #1622  
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Default RE: Top Flite 1/7 P-51 Build

My problem with my fixed gear on this P-51 is that the GEAR is FLEXING while taking off.. OMG you should
see this thing it actually looks like its WALKING lol..... and then its un controlable so I power down and then she
NOSES over... ITS rediculious.
I think I might have a solution to my delima I have givin this alot a thought and I think
I might have come up with a FIX.. I will keep you all posted with PICS.
Old 06-03-2008, 09:52 PM
  #1623  
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Default RE: Top Flite 1/7 P-51 Build

Hey BULL 51
I just read your question.. man I am sorry I didnt go back far enough I had
several E-mails at one time.. and I skipped right over yours....
OK nose over on take off... YES YES YES... ok things I would like to know about your
SPITFIRE.
I TOO have one mine is a Hangar 9 Modified. and that #$%T$#!!#$%!#$ noses over as well
and I have already installed ROBART RETRACTS in mine for an upgrade.. lol
..... MY P-51 noses over on TAKE OFF.. well. I have no answere for you YET.
I will I am doing some more mods. to mine and if Successful or NOT lol
I will let you know what I find out..
THERE IS NO WAY I WOULD BALANCE AND FLY MY TF GOLD P-51 at the recommended CG
ITS NOT RIGHT >> IT CANT BE.
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Old 06-04-2008, 06:27 AM
  #1624  
bull51
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Default RE: Top Flite 1/7 P-51 Build

TeamMuir1,

Well, my spitfire is a Peonix Models and its junk! Serves me right for going with an "unknown" manufacturer. But, I just wanted a practice plane to prepare me for the P-51. I crashed my Fun 51 and needed something to boost my confidence. This damn spitfire is not doing the job, lol. For better or worse, they will both be going up (at least I think they'll be going up) on friday.
Old 06-04-2008, 03:24 PM
  #1625  
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Default RE: Top Flite 1/7 P-51 Build

Well, lesson learned (for me at least). I used the finger method to balance my spitfire. Turns out, I was way off. Needed 1 1/4 oz in the nose. I assume this is not going to make it any easier to get in the air, but once up, she should do fine, I hope & pray.

OK, sorry about the spitfire talk here, back to the P-51. I also used my balancer to to check the balance of my Big Beautiful Doll. Had to add a little weight to the tail. T - 40 hrs for the maiden. (Weather permitting)

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