Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Building an XA-8 Babe_b10
Log in

I forgot my password

Building an XA-8 Pixel
Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
November-2019
jmcalata's

"Pee Wee .020 throttled combinated"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


Building an XA-8 Empty
World of Aviation

Building an XA-8

Go down

Building an XA-8 Empty Building an XA-8

Post  batjac on Sun Feb 07, 2016 12:29 am

Here’s my attempt at building an XA-8 combat plane in the two hours that the article says it can be done in.





The Half Fast Mark
batjac
batjac
Diamond Member
Diamond Member

2019 Supporter

Posts : 1745
Join date : 2013-05-22
Age : 56
Location : Portland, OR, USA

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  akjgardner on Sun Feb 07, 2016 5:47 am

Thanks for takeing the time to do that half fast Mark. You could also call yourself the speedy bandetee Mark.
akjgardner
akjgardner
Platinum Member
Platinum Member

Posts : 931
Join date : 2014-12-28
Age : 60
Location : Milan Indiana

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  rsv1cox on Sun Feb 07, 2016 6:24 am

ReMARKable Mark. Maybe the oldtimers were twice as fast, but not twice as good. Four hours? Takes me that long to build a solid wing hollow log with finishing requiring at least that long again.

Bob
rsv1cox
rsv1cox
Top Poster
Top Poster

2019 Supporter

Posts : 4718
Join date : 2014-08-18
Location : West Virginia

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  ARUP on Sun Feb 07, 2016 6:37 am

Not only were they twice as good builders but they didn't have CA glue! lol! It was fun to watch!!!
ARUP
ARUP
Gold Member
Gold Member

I Support My Forum

Posts : 179
Join date : 2015-09-13
Location : Kentucky

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  fredvon4 on Sun Feb 07, 2016 8:19 am

Well done video Mark... fun to watch

Thanks
fredvon4
fredvon4
Diamond Member
Diamond Member

2019 Supporter

Trusted Seller
Posts : 2964
Join date : 2011-08-26
Age : 64
Location : Lampasas Texas

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  getback on Sun Feb 07, 2016 9:39 am

Thank You Mark !! That was cool and being I have tried to build one of these and didn't finish yet , you are a much better builder than I , I just don't have a routine as to what to do next in any order . If you get finished or are I would love to see the product . I am wondering what you did around the engine compartment to keep fuel from blowing into the wing? Eric I Love This Forum!
getback
getback
Top Poster
Top Poster

2019 Supporter

Posts : 6433
Join date : 2013-01-18
Age : 62
Location : julian

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  batjac on Fri May 19, 2017 3:37 am

Well, I was working on a plane last night, and I came to a point where I needed to grab some stuff to continue, but I’d have to have gone into another room and would have woken up my wife.  So, I looked around the room for something else to work on, and I saw the remains of this sitting in a bag where I put it after doing the video.  Well, why not?  I grabbed the bag and got busy.  

First thing I did was do a little clean up on stuff I rushed in the video build.  Then I finished sheeting the upper portion per the plans.  But it seemed a little flimsy if I was going to use Monokote, so I put in a couple of shear webs between the spars.  That still seemed flimsy, so I boxed the top and bottom sheeting.  Nice and stiff now.

Building an XA-8 DSCN5160
Building an XA-8 DSCN5161
Building an XA-8 DSCN5162
Building an XA-8 DSCN5165


Then I reached in my covering box and the first thing to come out was a partial roll of red Monokote.  So red it is.

Starting covering.

Building an XA-8 DSCN5168


Bottom before tightening:

Building an XA-8 DSCN5172


Top before tightening:

Building an XA-8 DSCN5173


I didn’t want a solid color, so I needed a different color for the fin.  The only color I had that would be a good contrast was white, so white it is.  White fin and red body.  Hmmm…


So, I scalloped the trailing edge of the elevator.  I’ll have to see if I have any black trim sheet to make up some Maltese crosses.  Unfortunately, there still wasn't enough bracing when I tightened up the Monokote, so the upper inboard spar warped a little.  I doubt it'll affect the flying qualities, though.

Building an XA-8 DSCN5175


More to come,

The Coordinated Mark
batjac
batjac
Diamond Member
Diamond Member

2019 Supporter

Posts : 1745
Join date : 2013-05-22
Age : 56
Location : Portland, OR, USA

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  getback on Fri May 19, 2017 9:45 pm

Thanks Mark!! I will get back to you as soon as i get mine down to look at where i am ,,, its' only been a yr,!! Been hoping you would get to this again and there it is I Love This Forum!
getback
getback
Top Poster
Top Poster

2019 Supporter

Posts : 6433
Join date : 2013-01-18
Age : 62
Location : julian

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  batjac on Sat May 20, 2017 3:42 am

Okay, I’m pretty much done with this.  All that’s left is to spray paint the engine mounts and install the motor when that’s dry.  It should be good weather tomorrow, so I’ll paint the engine bearers and let it sit for a week.  Then I’ll mount a Medallion.  Unfortunately, I can’t find the Medallion I originally set aside for this plane.  I have no idea where I set it.  So I’ll have to take another Medallion I have and get it running nicely.  I couldn’t find a way to mount a hard tank that I liked, so I’ll use a balloon tank.  It’ll work out well, as the balloons I use are about the same shade of red as the covering, and the Medallion has a red venturi body.

Building an XA-8 DSCN5179
Building an XA-8 DSCN5181
Building an XA-8 DSCN5183

Eric, to answer your previous question, I smeared glue around inside, and I covered as much of the interior as my trim iron would reach.  There’re probably other vectors for fuel to get in, but I did my best, and I’ll probably just wedge some absorbent material behind the tank to catch any burnt fuel residue.


The Forgetful Mark
batjac
batjac
Diamond Member
Diamond Member

2019 Supporter

Posts : 1745
Join date : 2013-05-22
Age : 56
Location : Portland, OR, USA

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  OVERLORD on Sat May 20, 2017 5:40 am

Well done Mark, I like the Red baron finish!!
OVERLORD
OVERLORD
Diamond Member
Diamond Member

Posts : 1353
Join date : 2013-03-19
Age : 53
Location : Normandy, France

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  getback on Sat May 20, 2017 8:41 am

Thanks Mark , I see now how i can get the rest of mne together , and the reinforcing will be a definite , it is a flimsy plane structure . You's came out looking real good !! i hope to see it in the air if you're able to get some footage , O did you put any offset in the engine or rudder?? I think it will bee squirrelly in the air even with the tone down Medallion engine . lol! I Love This Forum!
getback
getback
Top Poster
Top Poster

2019 Supporter

Posts : 6433
Join date : 2013-01-18
Age : 62
Location : julian

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  roddie on Sun May 21, 2017 11:19 am

Nice job Mark! Do you remember the balloon tank capsules that I made from the floral water-tubes for cut-flowers? It holds a long-type party balloon. One of those would probably fit nicely into your tank-bay.

This photo shows the weight of the components that I used for one type. Coincidentally a red balloon..

Building an XA-8 Weight18

I also made versions that use the feed-tube as a stopper, eliminating the weight of a stopper in the capsule.

This one uses a cutting-tool tube for a capsule.

Building an XA-8 Capsul10

A small zip-tie seems to seal pretty well..

Building an XA-8 Zip-ti11
Building an XA-8 Zip-ti12

You might want to try cutting a rectangular sheet of transparent (or matching-red) plastic, slightly wider than your tank-bay. Flex-it to fit between the rails to form a "dome" over the balloon/capsule. If it's fairly rigid plastic, it should stay in place.. and not require removal for refueling. Transparent would be better for visually verifying the complete evacuation of air during fueling.

Building an XA-8 Chrolo10

I think that would work without having to do any more work to the airframe itself. Be sure that there are no areas that might abrade/puncture the balloon.

Andras (Balogh) uses balloons in his RC models.. and could give you more tips.

Good luck with the Medallion. I hope you find the misplaced one.. but it's always good to give an engine that needs it, some attention. Plus.. it'll give you something to do while the paint on the bearers cures.



roddie
roddie
Top Poster
Top Poster

Posts : 6641
Join date : 2013-07-17
Age : 59
Location : N. Smithfield, Rhode Island

http://www.stilburnin.com

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  batjac on Sat May 27, 2017 1:47 am

Well, the paint’s had a week to cure, so I added an engine and the fuel system.  I don’t know as I have ever run this Medallion, so I’ll have to pull it back off and tune it up before flying this thing.  

Roddie, I’m using a plastic fluorescent tube cover to hold the 9” balloon.  I bent it to shape so it will fit into the well in the wing.

Building an XA-8 DSCN5186
Building an XA-8 DSCN5189
Building an XA-8 DSCN5192
Building an XA-8 DSCN5194



The Lovecat Mark
batjac
batjac
Diamond Member
Diamond Member

2019 Supporter

Posts : 1745
Join date : 2013-05-22
Age : 56
Location : Portland, OR, USA

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  getback on Mon May 29, 2017 9:28 am

The X8-A came out looking good Mark . I don't think this plane was made to last a long time , just build in a afternoon and fly the next day . I really had some problems building it with the very thin wood pieces . Airplane
getback
getback
Top Poster
Top Poster

2019 Supporter

Posts : 6433
Join date : 2013-01-18
Age : 62
Location : julian

Back to top Go down

Building an XA-8 Empty Re: Building an XA-8

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum