RE: 40 pitts structural problem  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Airplanes >> ARF or RTF >> NitroModels Support >> RE: 40 pitts structural problem
Page: <<   < prev  1 2 [3]

Login
Message << Older Topic   Newer Topic >>
RE: 40 pitts structural problem - 4/28/2007 10:03:37 PM   
opjose



Posts: 5780
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: online 		Nice Stearman.

----

I flew my NM Ultimate 40S with a completely cracked interplane strut one time.

I didn't realize it had been broken during a botched landing, when I cartwheeled the plane over the field.

I was doing hard blenders and snap rolls with it this way.

I didn't even notice the damage until I had the plane on the ground!

Needless to say this area is now greatly strengthened.

---

Re: Hopping

Have you checked the tracking?

Normally this happens when the tail rudder is not consistent with the tail wheel.

e.g. you may actually need the tail wheel to point straight backward when the rudder is effectively applying a bit of rightward thrust.

Consider running the plane up and down the field, adjusting the wheel each time until the "hopping" tendancy stops.

I was all over the place with a few smaller tail draggers until I got the hang of offsetting the wheel correctly.



< Message edited by opjose -- 4/28/2007 10:04:05 PM >

_____________________________

-
Build em'', fly em'', crash em'' and build more.

(in reply to freeonthree)
       Post #: 51

RE: 40 pitts structural problem - 4/28/2007 10:34:18 PM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		My little super stearman has always liked to hop to a stop. My friends does it too. Im talkin about on the main wheels, not the tail wheel. It hops if I turn too sharp too. I've toed em in, out, and every which way with no improvement. Real short coupled biplanes have a tendancy to be a bit crazy on the ground. It's mainly because the landing gear is flexing, you can see it flexing when it hops. If your real careful, it can be avoided, but it's kinda tricky. The shorter they are, the worse they handle on the ground. The Pitts should be fun too ! The longer planes don't do that at all...

_____________________________

I dont crash, I just land hard

(in reply to opjose)
       Post #: 52

RE: 40 pitts structural problem - 4/29/2007 12:48:05 AM   
opjose



Posts: 5780
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: online 		Ah, ok... I get you.

Yeah, did this today with my Brio 10 too.

Jumping like a rabbit...



_____________________________

-
Build em'', fly em'', crash em'' and build more.

(in reply to freeonthree)
       Post #: 53

RE: 40 pitts structural problem - 4/29/2007 12:56:29 AM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		Brio 10 ? Was that a real plane ? Never heard of it...

_____________________________

I dont crash, I just land hard

(in reply to opjose)
       Post #: 54

RE: 40 pitts structural problem - 4/29/2007 1:02:28 AM   
opjose



Posts: 5780
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: online 		The E-Flite Brio .10 sized electric. A small pattern plane.

It too hops like mad. Especially with the long thin landing gear.



< Message edited by opjose -- 4/29/2007 1:03:14 AM >

_____________________________

-
Build em'', fly em'', crash em'' and build more.

(in reply to freeonthree)
       Post #: 55

RE: 40 pitts structural problem - 4/29/2007 1:25:21 AM   
freeonthree



Posts: 2562
Joined: 8/1/2004
From: Red Bluff, CA, USA
Status: offline 		Thats a cute little plane... Bet it flies great ! Im just hooked on four strokes. I won't even own a 2 stroke plane. I got rid of my heli because it had a 2 stroke on it. lol Now I wanna put a 4 stroke on my Revo ! That should be a dandy trick, and require alot of gearing.

_____________________________

I dont crash, I just land hard

(in reply to opjose)
       Post #: 56

RE: 40 pitts structural problem - 6/13/2008 4:49:56 PM   
bertnhank


 

Posts: 30
Joined: 11/24/2006
From: Calver City, KY, USA
Status: offline 		O.K., I gotta ask. If the mfg says cg is 4" from top leading edge, how can the BUILDER shange where the cg is.

I thought you need to add weight to balance the plane where they say the cg is with a small amount of varience.

Never heard of changing where the c.g. is.

I put 2.25 oz. of weight in the tail end, and it balances great at 4", just a hint of nose down which should be perfect.

Any suggestions.


Hank

(in reply to freeonthree)
       Post #: 57

RE: 40 pitts structural problem - 6/13/2008 5:19:47 PM   
opjose



Posts: 5780
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: online
quote:

ORIGINAL: bertnhank

O.K., I gotta ask. If the mfg says cg is 4" from top leading edge, how can the BUILDER shange where the cg is.

I thought you need to add weight to balance the plane where they say the cg is with a small amount of varience.

Never heard of changing where the c.g. is.

I put 2.25 oz. of weight in the tail end, and it balances great at 4", just a hint of nose down which should be perfect.

Any suggestions.


Hank


The C.G. is where ever it actually is, no matter what the manufacturer says.

It's "at" the point where the plane balances ( OR shows NO preference for nose or tail after many tries... ).


You can affect the C.G. point by moving components around. The easiest to move is the battery pack. Fortunately the battery tends to be a heavy item, relatively speaking, so moving it behind the canopy will move the C.G. towards the tail.

The manufacturer RECOMMENDED C.G. is NOT absolute either.

You can have the C.G. spot on and still find that the plane is too tail heavy, etc.

You are always better off setting the C.G. slightly forward of the recommended for safety and working backwards after you've put a few flights on the plane.



_____________________________

-
Build em'', fly em'', crash em'' and build more.

(in reply to bertnhank)
       Post #: 58

Page:   <<   < prev  1 2 [3]
All Forums >> RC Airplanes >> ARF or RTF >> NitroModels Support >> RE: 40 pitts structural problem
Page: <<   < prev  1 2 [3]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.500RCU1