10ft Wingspan Guinea Pig

Hutch Bunch Rc

Well-known member
Well I’m not sure how to start this, this is my first post, I’m 14 years old and I’ve flown rc for about 5 years now and have built (pshhh I mean crashed) plenty of foam and balsa planes. I’ve known about Flite test for 3 or so years now, I have built a few of their planes and use their building style on every plane I build. Awhile ago I bought a speed build kit for the Ft Guinea pig, and I loved it.
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So... I decided to go bigger. I’ve decided to build a 180% version of the Guinea pig, I’ve used this post for help quite a bit https://www.flitetest.com/articles/the-big-guinea-180-dtfb-ft-guinea-pig except I’m doing a 120” wingspan and a twin motor design instead of 4 motors. I’ve been working on it for around 4 days now and I started with this,
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And 6 hours of work later I have this,
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As you see it, it weighs about 4 pounds, with the other wingtip and the tail I’m estimating it will weigh around 5 pounds. This will be without any electronics. Speaking of electronics, I’m planing on using 6 standard size servos, a few 9 grams for the cargo door, 4250 800kv motors that are over 700 watts each and have around 6 pounds of thrust each. I will use any Esc I can find cheap, probably 80a escs. For batteries I am going to use x4 turnigy 3000mah 4s packs. 2 for each motor, they will be in parallel to basically give me a 6000mah 4s for each motor. At the current moment I’m thinking the all up weight of the plane will be a little over 10 pounds (5 pound shell, 1 pound in batteries, 1 pound in motors and escs, and then the servos and everything else) I’m wanting to paint it in a blue angles “fat Albert” theme. I will post more as I get farther along and when I buy the electronics I will make a list, I haven’t bought electronics yet in case I need to use bigger motors but I should be fine. The posts from now on will be starting from the first steps and going along, so I guess that’s it for this post.
 

Hutch Bunch Rc

Well-known member
Looks great! Are you planning to do the fins the Guinea has at the ends of the horizontal stabilizer?
Yes sir, they will be double upped like the rudder and elevator, I just haven’t gotten around to making them yet, I don’t think the guinea pig is complete with out those outer fins
 

Hutch Bunch Rc

Well-known member
Really there isn’t a whole lot of stuff left to do on the guinea, I need to order motors and escs now that I know how much it weighs, I need to make the wing struts out of some 1/8 aluminum I bought, I need to make the nacelles and mount the motors and escs, I need to Finish the tail (the little winglet things and the dowels to support the vertical stab), I also need to make a removable battery tray, it has to be in the nose so that will be interesting to make... and finally I need to figure out how I want to do the nose wheel, and then that’s honestly it, ooh I forgot paint. I will order the electronics probably tomorrow, and I’ll finish the Guinea here soon, I’ll have it ready by next years flying season for sure
 

Hutch Bunch Rc

Well-known member
Change of plans

For $110 I can get the 42-50 800kv motors, on a 4s and 13” prop they have about 900watts and 5-6 pounds of thrust and a 60a each

For $113 I can use 4x 3536 1100kv motors on 3s, over 4 pounds of thrust each on a 11” prop, with a 40a esc, I will have close to 18 pounds of thrust total! That’s a lot more than the 2 motors, the only issue is if I can fit all of them in the middle wing section, I may have to glue the wing 100% together for strength, making one solid 10’ wing instead of sections.

What are your thoughts?

Thanks @The Hangar
 

Grifflyer

WWII fanatic
Change of plans

For $110 I can get the 42-50 800kv motors, on a 4s and 13” prop they have about 900watts and 5-6 pounds of thrust and a 60a each

For $113 I can use 4x 3536 1100kv motors on 3s, over 4 pounds of thrust each on a 11” prop, with a 40a esc, I will have close to 18 pounds of thrust total! That’s a lot more than the 2 motors, the only issue is if I can fit all of them in the middle wing section, I may have to glue the wing 100% together for strength, making one solid 10’ wing instead of sections.

What are your thoughts?

Thanks @The Hangar
Four motors!!
 

Hutch Bunch Rc

Well-known member
Since before the wing wasn’t very strong...
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I decided it would be best to add struts, they are 1/8” aluminum bar, 3/4” by 36” and I bent the ends so one sits on the bottom the the fuselage and one sits on the bottom of the wing, there are 2 screws on each side to prevent twisting so 8 Total.
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Now... the wings are very very strong and I don’t think they will break any time soon, also you can see they don’t sag down anymore so yay 😀. Now I need to order the x4 3536 1100kv motors and x4 40a escs. I think I will do that here within the next week or so. When I start working on that I’ll update you.
 

CorsaiRC

Active member
Since before the wing wasn’t very strong... View attachment 184997 View attachment 184998 I decided it would be best to add struts, they are 1/8” aluminum bar, 3/4” by 36” and I bent the ends so one sits on the bottom the the fuselage and one sits on the bottom of the wing, there are 2 screws on each side to prevent twisting so 8 Total. View attachment 184999 View attachment 185000 View attachment 185001 View attachment 185002


Now... the wings are very very strong and I don’t think they will break any time soon, also you can see they don’t sag down anymore so yay 😀. Now I need to order the x4 3536 1100kv motors and x4 40a escs. I think I will do that here within the next week or so. When I start working on that I’ll update you.
I had sagging problems with my guinea too