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FT Racer - BUILD (FT Slinger)

Foam Addict

Squirrel member
#2
Very nice, I am now a Huge fan of the Spitfire, and I wanted a cheap pylon racer airframe for my club's foamy pylon racing events. Thank you guys so much for this airframe, keep them coming David!

Edit: I also modded the Spitfire to use cold formed Dollar tree foam board instead of poster board. It added so much strength, and looked way better in the end.
 
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#4
Great build. What motor / prop / esc are you using on this build. There was a mention of 800 watts?
Thanks for the great design and plans.
 

Jaxx

Posted a thousand or more times
#6
Very nice, I am now a Huge fan of the Spitfire, and I wanted a cheap pylon racer airframe for my club's foamy pylon racing events. Thank you guys so much for this airframe, keep them coming David!

Edit: I also modded the Spitfire to use cold formed Dollar tree foam board instead of poster board. It added so much strength, and looked way better in the end.
Foam Addict,
You can't leave us hanging like that. You have to post a picture so we can see what it looks like!
 

DDSFlyer

Senior Member
#7
Love the build video. Actually like that Josh and David were building together. The flow of the steps and build was great, the even had some time to put in some jokes! Great format for build videos!
 

Craftydan

Hostage Taker of Quads
Moderator
Mentor
#8
Great job guys! Likeing the buddy-build format -- works really well. Hardly notice the hour has gone by.


Question: Noticed your new recommendation to slit the paper when creasing the foam on the armin wing. Is this just for the longer spit. wings, or are you recommending it for all of your armin folded wings? (bloody wonder, baby blender . . . )
 

Foam Addict

Squirrel member
#9
Here is the mod on my current spit. the paint ruined the paper so it looks really ugly now, I will do a build thread this weekend though, I want another spit!

photo(2).JPG photo(3).JPG
Basically, I just reduced the former size by the thickness of the foam, peeled the paper off the bottom of the foam, and formed the foam to the formers with the edge of a table and trimmed it to fit
 

Jaxx

Posted a thousand or more times
#12
Here is the mod on my current spit. the paint ruined the paper so it looks really ugly now, I will do a build thread this weekend though, I want another spit!

View attachment 13059 View attachment 13060
Basically, I just reduced the former size by the thickness of the foam, peeled the paper off the bottom of the foam, and formed the foam to the formers with the edge of a table and trimmed it to fit
Nice! I'm going to have to try this. I love the Spitfire!. It flies like a dream.
 
#14
Hi Jackedman, I'm no expert but i wouldn't suggest that motor, its quite a high KV and is meant to be used with a smaller prop. I actually have that motor and i run it with 5x5 and 6x4 props on an airboat i made. You want a lower KV motor for these planes between 1000kv and 1500kv would be about right. I have actually just built this plane and i have this motor with a 8X4 prop. I haven't flown it yet but its the same motor i use on my spitfire.
 
#15
Here are some pics of my build. I made a quite a few changes to the design though. First i narrowed the fuselage, since its only wider for aesthetic reasons i thoughts i would keep it narrow and streamlined. I also got rid of the under cambered wingtip sections. Lastly i moved the servos so that they completely internal, and are mounted just behind the tallest former. I haven't had a chance to fly it yet, but ill let you guys know how it goes.
IMG_3683.JPG IMG_3685.JPG IMG_3686.JPG
 

xuzme720

Dedicated foam bender
Mentor
#16
Nice! I am curious as to how the loss of the undercamber will affect it's flying feel. Did you also build one per plans to compare?
 
#17
Nice! I am curious as to how the loss of the undercamber will affect it's flying feel. Did you also build one per plans to compare?
I only made this one. I'm interested as well, as long is it has a gentle stall then I'm happy. I have programmed some flaperons so that should help to get some slower landings. One other thing i did which i didn't take any pics of as put in some extra ribs internally on the rear side of the wing spar to get more surface area when glueing wing. I found that there was very little surface area at the glue wasn't holding very well. Hopefully ill be able to get it out tomorrow and see how it flies.
 
#18
Hi Jackedman, I'm no expert but i wouldn't suggest that motor, its quite a high KV and is meant to be used with a smaller prop. I actually have that motor and i run it with 5x5 and 6x4 props on an airboat i made. You want a lower KV motor for these planes between 1000kv and 1500kv would be about right. I have actually just built this plane and i have this motor with a 8X4 prop. I haven't flown it yet but its the same motor i use on my spitfire.
after some thinking i found another motor i have in my whats left of stock its a super tiger .10 motor it works like a dream. that other motor im going to us it in my versa with a 6x4 prop on it maybe ill meter test it for sure. Once my versa is done and flying im building this next for sure
 

Jaxx

Posted a thousand or more times
#19
Here are some pics of my build. I made a quite a few changes to the design though. First i narrowed the fuselage, since its only wider for aesthetic reasons i thoughts i would keep it narrow and streamlined. I also got rid of the under cambered wingtip sections. Lastly i moved the servos so that they completely internal, and are mounted just behind the tallest former. I haven't had a chance to fly it yet, but ill let you guys know how it goes.
AndrewPoll,

Looks great! Did you use the Spitfire fuselage for this build, or did you redesign the Racer fuselage?
 
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Formori

Beginner Crasher
#20
I've thought about building a swappable for a while now, but this is the first one that I absolutely had to build.

I made a few changes during the build process (like glue-hinges all around) and I contemplated making a removable wing, but I like the design as it is. Haven't gotten to fly it yet, but hopefully tomorrow! (if the weather cooperates)

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I decided to use simple red and yellow vinyl electrical tape (the cheapo stuff) to add some color to the plane, and the canopy is a pop-bottle piece that I cut out to fit where the speed canopy would go.

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Here's my bubble-canopy made from a 2L pop bottle, the "top, shoulder" of the bottle provides the round bubble effect, and I really like how it looks, it's also really strong in comparison to the poster board.

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I used a lot of extreme packing tape to reinforce edges (because I'm new to flying and I know I'll crash) and also put a layer of regular tape along the whole bottom to help with sliding on grass and stop the paper ripping if it crashes on a rough surface.

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And since I didn't have any servo horns around I had to make a couple out of some scrap 1mm acrylic I had lying around, they actually seem to function really nicely, but I'll have to see how they hold up over repeated abuse.