37% Pitts Callenger II Build    Gallery
View related threads: (in this forum | in all forums)

Logged in as Guest



Users viewing this topic: none
    Search This Thread  
 
Printable Version



All Forums >> RC Airplanes >> Kit Building >> 37% Pitts Callenger II Build Page: [1] 2 3 4 5   next >   >>  

Tower Hobbies Get Coupon Codes Brands  
Login
Message << Older Topic   Newer Topic >>
37% Pitts Callenger II Build - 1/7/2009 12:12 AM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		Hey Guys,

I'm am building a 37% Pitts Challenger II to be covered like Sean Tuckers. The Design is his old squared off wing tip plane, not the current Challenger. I started this project in March of 08 and you can see from the pics I didn't get very far. I promised in my other posts I would post the bulid and it's better late than never. This last year was really busy for me and I am glad to be back at this kit. I gonna need your help though this is my first giant scale build, and the instructions are vague. I didn't get the engine yet (planning on a DA-85) so I started on the lower wing Last weekend. I will need servo advice, I am using a DX7 radio. Also advice on making this plane strong. Watch Sean's video http://www.youtube.com/watch?v=bUT4v0z_KSk I don't want to worry about this plane breaking if i'm doing aerobatics like this. Any help would be greatly appreciated if I go much farther it will be hard to change things on this build. What do you think about fiberglassing the center of the wings? They have a doubled spruce spar in the front and a single balsa in the rear. I put shear webbing in the entire length of the front spar. Not sure If I should do the rear though. Thanks in advance for your help!!!!


Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


Hide Signatures
       Post #: 1

RE: 37% Pitts Callenger II Build - 1/7/2009 1:27 AM   
Gray Beard


 

Posts: 12544
Score: 314
Joined: 4/21/2003
Last Login: 5/19/2013
From: Hemderson, NV, USA
Status: offline 		I got to watch him last year at our air show, he does things I can't do with an RC. Not sure what kit you have but glassing the center section is a good idea and the shear webs. Most plans call for the glass. My main problem with stunt bipes has been the N-Struts breaking or the attachments that they mount to. I have never folded a wing. One of my friends just finished building one of the Balsa USA DR1 and tried something different for the strut mounts and it seems to be working for him. He used that circut board material you can get at radio shack instead of using ply. I know a DR1 isn't a high G stunt plane but the N-Struts are still under a heavy load doing loops and flat spins.

_____________________________

Drinking and driving are illegal, why do bars have parking lots
Daisy Air Guns, keeping kids off your lawn for 100 year

Hide Signatures

(in reply to rwagner24)
       Post #: 2

RE: 37% Pitts Callenger II Build - 1/7/2009 1:36 AM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		The kit came from http://www.eurekaaircraft.com/

Hide Signatures

(in reply to Gray Beard)
       Post #: 3

RE: 37% Pitts Callenger II Build - 1/7/2009 2:34 AM   
krayzc-RCU



Posts: 7398
Score: 104
Joined: 3/26/2002
Last Login: 5/19/2013
From: Kannapolis, NC, USA
Status: offline 		i am here to watch as its looking good

_____________________________

smooth as silk!

Hide Signatures

(in reply to rwagner24)
       Post #: 4

RE: 37% Pitts Callenger II Build - 1/7/2009 7:06 PM   
Gray Beard


 

Posts: 12544
Score: 314
Joined: 4/21/2003
Last Login: 5/19/2013
From: Hemderson, NV, USA
Status: offline 		NICE!!! I wouldn't mind a set of the plans. The funny thing was seeing the short kit for the Daddy Rabbit being offered, I had the plans for this plane and started scratching one out just for fun. It's on my bench right now. Most people have never heard of the plane. By not showing the plans there is no way to tell how they have things designed on your kit. It may or may not need anything extra added to it for extra strength, you should just phone them and ask someone that is more in the know about there plane/kit. Some of the things someone like me does to a kit may not be needed on your's, just depends on how it was designed. Nice looking plane!!!

_____________________________

Drinking and driving are illegal, why do bars have parking lots
Daisy Air Guns, keeping kids off your lawn for 100 year

Hide Signatures

(in reply to krayzc-RCU)
       Post #: 5

RE: 37% Pitts Callenger II Build - 1/7/2009 7:45 PM   
av8djc


 

Posts: 204
Score: 100
Joined: 9/23/2003
Last Login: 12/31/2012
From: Payson, AZ, USA
Status: offline 		I don't want to hijack this thread but have one simple request/question:

I have a fiberglass fuselage short kit of a Christian Eagle I picked up a number of years ago. Since my memory is weak I'd like to find out what scale it is. I think it's probably 1/3 but would like to know. The measurement from the firewall to the rudder post (rudder hinhe line) is 46". Could you tell me what that dimension is on your 37?

And thanks for the link to what looks like a great company.

Dave


_____________________________

Dave
AMA 494

Hide Signatures

(in reply to Gray Beard)
       Post #: 6

RE: 37% Pitts Callenger II Build - 1/7/2009 10:17 PM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		I hooked a tape measure on the top of the firewall and streched it level to the rudder hingeline. 59 1/4"

Hide Signatures

(in reply to av8djc)
       Post #: 7

RE: 37% Pitts Callenger II Build - 1/8/2009 1:39 AM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		In a nut shell this plane is avaible as a builders kit from someone else that actually owns rights to it. If you order it from him you get plans landing gear a canopy and the cabanes. No wood, you have to cut all the pieces to match the plans. Eureaka Aircraft bought a set of plans scanned all the parts in to a computer and cnc routered all the parts and sold it as a short kit. I guess they worked out a agreement with the owner. The only pain is there are almost no instructions. I going off of what is printed on the plans. There is no mention of fiberglass anywhere. I have seen alot of planes using fiberglass on the center of wings and the firewall. I want to make this plane strong but don't want to make it heavier if its not helping anything. I never scratch built anything before and thought having all the parts already cut out would be a great help. I just thought there would be more of a step by step instruction. Somthing else I never saw before is the aerilon setup. You basically build the wing then cut them out and hinge them. Not sure how I going to do that yet. Im using Robart hinges and have a jig to center drill the control surface. Don't know if it will fit on the back of the wing and front of the aerilon.

Hide Signatures

(in reply to rwagner24)
       Post #: 8

RE: 37% Pitts Callenger II Build - 1/8/2009 2:04 AM   
Gray Beard


 

Posts: 12544
Score: 314
Joined: 4/21/2003
Last Login: 5/19/2013
From: Hemderson, NV, USA
Status: offline 		Glassing the center section doesn't add much weight. If this is a Miles Reed design it should be OK as drawn but it's still worth the call!!

_____________________________

Drinking and driving are illegal, why do bars have parking lots
Daisy Air Guns, keeping kids off your lawn for 100 year

Hide Signatures

(in reply to rwagner24)
       Post #: 9

RE: 37% Pitts Callenger II Build - 1/8/2009 7:08 AM   
av8djc


 

Posts: 204
Score: 100
Joined: 9/23/2003
Last Login: 12/31/2012
From: Payson, AZ, USA
Status: offline 		Thanks rwagner24. Looks like I might have a 1/4 scale.

Dave


_____________________________

Dave
AMA 494

Hide Signatures

(in reply to rwagner24)
       Post #: 10

RE: 37% Pitts Callenger II Build - 1/9/2009 1:40 AM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		Just a quick update. Glued leading edge on wing today. Also some bracing where the dowls are. If your checking in on this build dont expect it to go fast I work third shift and will really only get alot done on the weekends.

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


Hide Signatures

(in reply to av8djc)
       Post #: 11

RE: 37% Pitts Callenger II Build - 1/9/2009 2:33 AM   
mrbigg



Posts: 4734
Score: 155
Joined: 10/30/2004
Last Login: 4/24/2013
From: Streator, IL, USA
Status: offline 		"Somthing else I never saw before is the aerilon setup. You basically build the wing then cut them out and hinge them. Not sure how I going to do that yet. Im using Robart hinges and have a jig to center drill the control surface. Don't know if it will fit on the back of the wing and front of the aerilon."

Looks like to me, the easiest thing to do for the ailerons is to cut right down the center of the rear spar, cap both cut ends with some 1/4"x whatever the thickness of the wing, and then add some triangle stock. Perfect for the Robarts. Don't worry about the jig. With the triangle stock, you can file in a flat spot right on the tip and drill it straight in.

_____________________________

Smooth, like Keith Stone.

Hide Signatures

(in reply to rwagner24)
       Post #: 12

RE: 37% Pitts Callenger II Build - 1/9/2009 4:57 PM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		In the directions I have they tell you to sheet the wing including the aerilons. Cut them out along the back edge of the rear spar. Then glue in blocks into the rear of the wing and front of aerilons for hinges to attach. Cap off the opening in the wing and the front of aerilon. If you look at the cross section view of the aerilon on the plans and the one on the real plane they are shaped different. I like the one on the plane better it looks like another small wing(see picture in my first post). The one on the planes have a weird cut out on the bottom that looks like it would be hard to do. I have a scroll saw I can put the balde in sideways and possibly just (with help) feed the wing in to it to cut them out. Not sure if it would be a good idea to cut the rear spar in half long ways though.

Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


Hide Signatures

(in reply to mrbigg)
       Post #: 13

RE: 37% Pitts Callenger II Build - 1/9/2009 6:54 PM   
Gray Beard


 

Posts: 12544
Score: 314
Joined: 4/21/2003
Last Login: 5/19/2013
From: Hemderson, NV, USA
Status: offline 		You use a cut off saw or Japaneese cut off saw or flush cut saw, all the same thing. You can get one at Harbor freight. If you have one of the saws sold at tower with the red handle then you can remove the top part of the blade and it is then a flush cut saw too. The Dubro hinges shown go in at an angle and you will have gobs of throw. Real sick today so if I'm making less sense today then normal, sorry!!

_____________________________

Drinking and driving are illegal, why do bars have parking lots
Daisy Air Guns, keeping kids off your lawn for 100 year

Hide Signatures

(in reply to rwagner24)
       Post #: 14

RE: 37% Pitts Callenger II Build - 1/9/2009 7:22 PM   
mrbigg



Posts: 4734
Score: 155
Joined: 10/30/2004
Last Login: 4/24/2013
From: Streator, IL, USA
Status: offline 		cutting it long ways would be fine. It's pretty wide. Plus you will be stiffing it up. I wouldn't sheet that whole wing either. Waste of wood and adds excess weight. I'd sheet the front, trailing edge forward an inch or so, and then cap strip it. I'll draw up a quick pic of how I'd do the ailerons for you.

_____________________________

Smooth, like Keith Stone.

Hide Signatures

(in reply to Gray Beard)
       Post #: 15

RE: 37% Pitts Callenger II Build - 1/9/2009 7:34 PM   
mrbigg



Posts: 4734
Score: 155
Joined: 10/30/2004
Last Login: 4/24/2013
From: Streator, IL, USA
Status: offline 		Here it is.

Attachments
Click to see fullsize image.
Click for fullsize


_____________________________

Smooth, like Keith Stone.

Hide Signatures

(in reply to mrbigg)
       Post #: 16

RE: 37% Pitts Callenger II Build - 1/9/2009 11:53 PM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		That looks easy enough. They would be shaped closer to scale that way too. And that section of the rear spar will be stronger there than anywhere else when done. Very good, just need a saw. What would you suggest on servos for the aerilons? If you need measurments or anything let me know. I want to get them before I glue in my servo rails. Using a DX7 Spectrum. Thanks for your help so far!!!

Hide Signatures

(in reply to mrbigg)
       Post #: 17

RE: 37% Pitts Callenger II Build - 1/10/2009 1:32 AM   
bruce88123


 

Posts: 11699
Score: 108
Joined: 11/26/2004
Last Login: 5/8/2013
From: Memphis, TN, USA
Status: offline
quote:

ORIGINAL: rwagner24

That looks easy enough. They would be shaped closer to scale that way too. And that section of the rear spar will be stronger there than anywhere else when done. Very good, just need a saw. What would you suggest on servos for the aerilons? If you need measurments or anything let me know. I want to get them before I glue in my servo rails. Using a DX7 Spectrum. Thanks for your help so far!!!

Closer to scale? Are you sure? Many full scale ailerons ARE hinged like shown in the plans but I'm not sure about your plane. http://www.robart.com/how_to/hinge_points.aspx shows a number of hinging methods using hinge points.

_____________________________

3-D is for Monster Movies

Hide Signatures

(in reply to rwagner24)
       Post #: 18

RE: 37% Pitts Callenger II Build - 1/10/2009 1:49 AM   
bruce88123


 

Posts: 11699
Score: 108
Joined: 11/26/2004
Last Login: 5/8/2013
From: Memphis, TN, USA
Status: offline 		http://manuals.hobbico.com/top/topa0415-manual-v1_1.pdf Look at this manual for some possible insight on your situation. In the area of pgs 39-41 I believe.

_____________________________

3-D is for Monster Movies

Hide Signatures

(in reply to bruce88123)
       Post #: 19

RE: 37% Pitts Callenger II Build - 1/10/2009 2:35 AM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		bruce88123 Thanks for that manual thats exactly what I have to do. Oh and when I said that way was more scale I ment more scale as it looks more like the real planes aerilons not thats how its done on real planes. If you guys are into building then you will probably enjoy this build (not a model) my friend in Georga is doing. http://curtissjennyrestoration.blogspot.com Thanks for the great info.


Hide Signatures

(in reply to bruce88123)
       Post #: 20

RE: 37% Pitts Callenger II Build - 1/10/2009 5:05 AM   
darrolair


 

Posts: 205
Score: 100
Joined: 2/20/2006
Last Login: 5/19/2013
From: polson, MT, USA
Status: online 		rwagner 24,
For your servos, figuire out how many square inches the ailerons are and use servos accordingly eg. 100 sq. in. = 100 in. oz. servo.
Your choice of brand and or digitals vs. analog.
Good Luck,
Darrol

Hide Signatures

(in reply to rwagner24)
       Post #: 21

RE: 37% Pitts Callenger II Build - 1/10/2009 4:06 PM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		Thanks Darrol,

They are 20 x 3 1/2" so I guess anything around 70 would be ok. Not sure on rudder and elevators yet. It looks like each elevator gets one and the rudder gets two. they are all mounted in the sides of the fuse under the horizontal stab.

Hide Signatures

(in reply to darrolair)
       Post #: 22

RE: 37% Pitts Callenger II Build - 1/11/2009 12:19 AM   
mrbigg



Posts: 4734
Score: 155
Joined: 10/30/2004
Last Login: 4/24/2013
From: Streator, IL, USA
Status: offline
quote:

ORIGINAL: rwagner24

That looks easy enough. They would be shaped closer to scale that way too. And that section of the rear spar will be stronger there than anywhere else when done. Very good, just need a saw. What would you suggest on servos for the aerilons? If you need measurments or anything let me know. I want to get them before I glue in my servo rails. Using a DX7 Spectrum. Thanks for your help so far!!!

Your welcome. I have an Ultimate with the same wing span as yours and I'm running 4 servos. They are JR 8611's. My ailerons are huge though. Each side is about 41". Since yours are smaller you could step down alittle. If doing four, I'd use 645's or equivelent. Digital version would be my choice. If you wanted to go scale with the interlink between top and bottom, I'd use two 8611a's or 7995's. I'm doing this with my Cox Pitts M12 this spring. You can get these for about 80 bucks apiece when ordering two or more.

Thanks for the link to the Jenny. Love the Great Waldo Pepper.

_____________________________

Smooth, like Keith Stone.

Hide Signatures

(in reply to rwagner24)
       Post #: 23

RE: 37% Pitts Callenger II Build - 1/11/2009 4:05 AM   
rwagner24


 

Posts: 63
Score: 100
Joined: 7/21/2007
Last Login: 10/21/2012
From: Jonestown, PA, USA
Status: offline 		Well had a extra 20 mins today so I sheeted the top of my lower wing. Ok mabe It took most of the day but whos counting? Mrbigg don't be mad at me, but I decided to cut along the rear of the rear spar instead of cutting it in half. I wasn't worried about strength just figured it would be easier to cut the ribs off straight along the back of the spar vs 2 spars length wise which are at 2 different angles. Will still use the setup in your drawing. Thats how is says to do it in my limited directions I just didn't understand it before.
Let me run this by you all. The bottom wing has dihedral, 3/4" at each wing tip. The directions say to block the tips up while building the wing and weight down the center which I did. I went one step further and made 3/8" spacers and put them under the half way points between wing tip and center of wing to make sure the angle stayed the same from tip to center. The guy that cut the kit told me to never buid a wing this way because it could warp. He said I should of built both halfs flat then join them with one raised 1 1/2". I didn't do it that way because there was no way I could of had a scarf splice in the spars. Also my I strut mounts have to be angled out at 7 1/4 degrees and that would of been harder to do.

I had the wing firmly attached to the table today with the correct spacers in place. Hopfully with the sheeting on it cant warp.



Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


Hide Signatures

(in reply to mrbigg)
       Post #: 24

RE: 37% Pitts Callenger II Build - 1/11/2009 4:49 AM   
mrbigg



Posts: 4734
Score: 155
Joined: 10/30/2004
Last Login: 4/24/2013
From: Streator, IL, USA
Status: offline 		I would sheet the bottom of the aileron first and then the top before you cut it off. That way you'll know it's straight.

_____________________________

Smooth, like Keith Stone.

Hide Signatures

(in reply to rwagner24)
       Post #: 25

Page:   [1] 2 3 4 5   next >   >>  
All Forums >> RC Airplanes >> Kit Building >> 37% Pitts Callenger II Build
Page: [1] 2 3 4 5   next >   >>  




Jump to:


 
Google 



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

Photo Gallery | Instructor Search | Field|Track|Marina Search

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

SITE MAP!   : :   FORUM RULES

RC Universe is a service of Internet Brands, Inc. Copyright © 2001-2013.

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


1.219RCU1