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Jan 15, 2018, 12:27 PM
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The FT planes are addicting, but the foam can be had cheaper at Dollar Tree. I've built a dozen of them so far, and with the swappable power pod only have 4 motor setups. Build, fly, crash, swap the prop and power plant into the next plane, and repeat.

Especially with the simple plans, if it doesn't line up, don't worry - it'll still fly, it's just a little ugly.
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Jan 15, 2018, 01:36 PM
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Thread OP
Quote:
Originally Posted by Blacky's Boy
I haven't read through every post in this thread. So excuse me if I'm recommending something that has been suggested before.

I would HIGHLY recommend purchasing a watt meter and hooking it inline with your battery and THEN test your plane.




I did so with my Blue Baby 42" and got instant confirmation that I'd have more than sufficient power to fly. I believe that with a plane like the FT cub you need about 100w.

I'd also weigh that plane and get an All Up Weight (AUW) and then evaluate it against the readings from the Watt meter.

Here's some links that might be helpful
https://kb.rcoverstock.com/tools/cal...rpm-converter/
http://www.flybrushless.com/tools/thrustCalc
https://hobbyking.com/en_us/electric-flight-basics

dont have a watt meter,be nice to get one though.
right now with battery,motor,esc,landing gear and fuse/wing im reading 1.9 lbs,my 2700 mah pack alone is .6 lbs
my other 2 batteries are kinda old,so i was leaning toward they just cant keep up.
by looking at the chart you provided,ill need atleast 140w running atleast a 20c 3s lipo


Quote:
Originally Posted by Brett_N
The FT planes are addicting, but the foam can be had cheaper at Dollar Tree. I've built a dozen of them so far, and with the swappable power pod only have 4 motor setups. Build, fly, crash, swap the prop and power plant into the next plane, and repeat.

Especially with the simple plans, if it doesn't line up, don't worry - it'll still fly, it's just a little ugly.
im gonna have to go dollar tree shopping,now i wanna build a few of their planes.
Last edited by igotit; Jan 15, 2018 at 01:47 PM.
Jan 15, 2018, 02:12 PM
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Thread OP
A3D3EB21-F5FF-4C30-A889-1CBF2D6F1672 by Nick Pellegrin, on Flickr
C67AA39D-80AA-4E5D-B8EF-1607215F3B81 by Nick Pellegrin, on Flickr
Jan 15, 2018, 02:26 PM
Registered User
Greg Knipp's Avatar
Quote:
Originally Posted by Brett_N
The FT planes are addicting, but the foam can be had cheaper at Dollar Tree. I've built a dozen of them so far, and with the swappable power pod only have 4 motor setups. Build, fly, crash, swap the prop and power plant into the next plane, and repeat.

Especially with the simple plans, if it doesn't line up, don't worry - it'll still fly, it's just a little ugly.
I agree with you as I do not have the time to build everyone I would like.
I use the Ross foam board from Wal-Mart. It costs $.89 per sheet. I like it because the paper doesn't Dr laminate.
Jan 15, 2018, 02:59 PM
Foamy and Glider fanatic
Blacky's Boy's Avatar
I would highly suggest going with taller landing gear with a wider stance. Narrow landing gear made taxing a real pain! You plane wants to tip over when you turn. I made my landing gear per the plans using piano wire and ended up reinforcing them in a couple locations.

Additionally, I would look at Flite Test's video archive and look for the episode where they made wheels from Pool Noodles and soda cap bottles. They are SUPER simple to build and work just fine.
Jan 15, 2018, 03:48 PM
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Thread OP
I can print wheels,and make the gear wider,or make the stock gear.
Im just messing around and building a good beater.

My buddy just showed up and gave me 10 escs,10 motors,4 edf units,10 servos,a new built p51 mustang with atleast 5ftvwingspan and brushless.a small cub around 30” wingspan got smashed,new never flown hobby zone cub.
Lots of goodies
A friend of his has a large room full of new planes he was throwing out.
Last edited by igotit; Jan 15, 2018 at 03:53 PM.
Jan 15, 2018, 08:55 PM
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Thread OP
reading up at flitetest,supposed to weight .9 lbs without battery......im weighting in at 1.5 no battery 1.9 lb total with my only good battery.
so i think this walmart board is too heavy.....so i went out and bought some dollar tree foam board.....and its alot lighter than the walmart one,a lil thinner aswell.
so ill start building another one.....or maybe one of their other kits.
plan on test flight thursday or friday once the wind here calms down.
it will should fly that heavy but wont be as gracefull as its intended to be.
Jan 15, 2018, 10:54 PM
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Thread OP
went test flight,and i was right shes too heavy,she does fly though but gotta stay on throttle.
gonna build another from dollar tree foam.
i have 1/3 of a sheet of the walmart board i was supprised at the weight.

walmart sheet 22x28 $3 each
dollar tree sheet 20x29 3/4 $1 each

walmart foam board 1/3 of a sheet 139 grams
a full dollar tree board 114 grams

id have to guess the full walmart sheet is around 400 grams per sheet,i used almost 3 sheets.
the walmart one is alot harder to bend and will take abuse better.

cheap lesson learned

something to be excited about the free 55" wingspan p51 missing 12"x4" 3 blade prop,carbon wing spar and a few bolts,got the big brushless motor out of it at the moment.

468AAF15-D92E-4B33-936A-1E12A0EF62E7 by Nick Pellegrin, on Flickr
3ACA5E48-E65A-464E-B78D-364A6A5FBFFF by Nick Pellegrin, on Flickr
Last edited by igotit; Jan 15, 2018 at 11:41 PM.
Jan 16, 2018, 01:01 AM
Registered User
Thread OP
reprinted plans,tried different print setting,but still missing lines and relationship marks,first round i simply traced out missing lines and transfered,but i wound up with 1 fuse half taller than the other giving me a gangsta lean that wasnt noticable till she was all glued up.
so this round ill use only 1 half of the fuse and top,trace it then flip it to ensure both halfs are identical.

i did try to fit to page and changed page size to 8x10 and it reduced overall size of plane to around 34" winspan,woulda been smaller and lighter but then my gear woulda been oversized.


65ADA5BF-2D44-483E-949D-115990F5D313 by Nick Pellegrin, on Flickr
2BDEA370-DAC0-4A28-9754-D71D3618A168 by Nick Pellegrin, on Flickr
B3EE6139-1C23-4139-8A79-200681A66113 by Nick Pellegrin, on Flickr

so i layed out 1 half,then started peicing together the other half flipped over the known good half.lined up the outside shape and traced the missing lines and relation ship marks wound up being 1/8 inch off,and the lines for the fuse stiffners and motor tray guide wer also off on the print.im glad i done it this way the second time around.
all i did was make a mirror image of 1 half to form equal symetrical shape.
so the supplied print will give you a crocked plane with a bulkhead out of place.
but im still thankfull for this free print.

B36099A5-0B5E-482C-AAF7-332A2BF5D2AB by Nick Pellegrin, on Flickr
1B5A8E4C-3E03-45BC-BAD9-4018E6C232CA by Nick Pellegrin, on Flickr
933CA0B2-0656-46DB-AD34-59B7E9853156 by Nick Pellegrin, on Flickr
Last edited by igotit; Jan 16, 2018 at 02:16 AM.
Jan 16, 2018, 03:36 PM
Registered User
Thread OP
new fuse is almost done.the weight difference is drastic.

first on the scale is a small scrap of walmart board
second pic is the readi board my fuse bottom.
the size compared to the weight is unreal.

8DB46A1D-077A-4C55-8AFF-09B51949C826 by Nick Pellegrin, on Flickr
603E0496-5AEB-45E1-AE16-C9A9AF487AB6 by Nick Pellegrin, on Flickr
Jan 16, 2018, 05:01 PM
A Day @ a Time - Matt. 6:25-34
ruff1's Avatar
Igotit, ditto on the watt meter. A must have in your kit. It saved me one plane when I detected a noticeable power loss when running up a motor at the field. I was able to see one cell was almost zero on voltage but the other two were had acceptable voltage.
It will keep you from overloading the motor and esc plus give you actual performance values. I have one setup that on paper should not work, but actual values are safe.
Jan 16, 2018, 05:10 PM
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Thread OP
Quote:
Originally Posted by ruff1
Igotit, ditto on the watt meter. A must have in your kit. It saved me one plane when I detected a noticeable power loss when running up a motor at the field. I was able to see one cell was almost zero on voltage but the other two were had acceptable voltage.
It will keep you from overloading the motor and esc plus give you actual performance values. I have one setup that on paper should not work, but actual values are safe.
im going to pick one up,i agree its needed.


new fuse straight and lite weight,and i added extra reinforcement around landing gear slot on the inside of belly.
the ideal goal is just under 1 lb witout battery.

D0E1EE41-34F0-4AB3-8376-DADFC0EF4EC7 by Nick Pellegrin, on Flickr
Jan 16, 2018, 07:04 PM
A Day @ a Time - Matt. 6:25-34
ruff1's Avatar
I have the Electrifly PowerMatch:
http://www.electrifly.com/miscproducts/gpmm3220.html
There are a lot of good ones out there. This one ran around $50.
The Watts Up is very popular.
Jan 17, 2018, 12:25 AM
Registered User
Thread OP
Quote:
Originally Posted by ruff1
I have the Electrifly PowerMatch:
http://www.electrifly.com/miscproducts/gpmm3220.html
There are a lot of good ones out there. This one ran around $50.
The Watts Up is very popular.
thanx for that info
Jan 17, 2018, 12:59 AM
Registered User
Thread OP
the old wing weights more than my new fuse and wing.....and half roll postal tape....lol.
C89AA648-E2E1-4CB0-845A-F9C0C4697A62 by Nick Pellegrin, on Flickr
BE6C789F-5180-4D44-AB36-54C213303694 by Nick Pellegrin, on Flickr
E5E4E901-1986-4E73-BF39-ECFF80425D85 by Nick Pellegrin, on Flickr


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