foam thermic 50x

dutchmonkey

Well-known member
So I took my wolf/thermic/bot wing and made a new fuselage for it and what better then and a thermic. I used the thermic plan and modeled it up in solidworks. I am using all my gear from my tiny trainer in this. It was a complicated build but was worth it. Has a full flying stab and a carbon arrow boom. Will get to madien this on sunday if anyone is interested I can put together some plans
 

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dutchmonkey

Well-known member
So all I can say from the maiden flight is I did not realize foam board could soar like that. So I used the tt balance point and gave it a good toss with quite abit of up trim it glided better than I thought it was going to but it was nose heavy. Moved some stuff around inside and got it farther back but not enough. It helped but I think it could easly go back another 3/8" with the up trim it has. Then next test glide I gave it enough power to climb 3 feet then it leveled out and went 1 1/2 soccer feilds before it touched down just amazed by that. So lets try power next using the mighty mini setup with a 6x4 and a 2 cell lipo powered it up and away she went almost vertical did a 30 second climb to about 200 feet powered off and looked for lift frpm there 6 miniutes later I had to power up again and this time it was a 9 minute flight befoebefore I powered it up again and again. After the 35 minutes of flight I landed it and the 460mah battery was still half full wow. So now the bad the full flying stab worked great I just did nit give it enough movment 3/8" up and down worked but could use more ( the rudder was more than enough). Balance was difficult to achive I am going to extend the pillar for the fing farward another 3/4" this should help out with that. I just ordered a sj4000 cam so I hope it showes in up this week so I can get some video of it.
 

PeterGregory

CrossThread Industries
I saw your video and you have a winner on your hands. I have an old Thermic 50 with pulse rudder I got cheap on eBay. The real win was that it had a Cox .010 on it. The total combo was less than what used .010's are going for now on eBay. I am also interested in using CF arrow shafts like you did - so plans would be great, when you find the time to publish them. I am unsure what happens using the shaft the way you did if there are ever and torsional forces on the tail I.e how to affix the tailfeathers to that impossibly small shaft?
Great share - amazing what spin-off designs are coming in these forum pages.
Best,
Poughkeepsie Pete

Update - My appreciation for the "Thermics" from Frank Zaic has increased. I see he had several variants. I think mine is the built-up fuse and I see the pod version 50X you have converted. Nice job - all of them have great performance, apparently.
 
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dutchmonkey

Well-known member
Yes there are several variants the down side is only a few have plans still. I am almost done with v2 and now that I have a camera I will shoot some video of the assembly and share the plans. I am also working on a baby gull free flight to rc with dtfb if this works out I have a few more of frank zaics plans to do.
 

Pancho

New member
And more specifically, I'm interested in the fuse plans. I want to build a similar fuse for my simple soarer. That fuse is very clean and I wanted to expand into carbon rod tail booms.
 

dutchmonkey

Well-known member
yes here. Im Very interested in the plans ;) can you put a step-file too?

step-file?

i will have v2 done this weekend and I will have plans ready on Tuesday with a 50" and 60" wing. i will also enlarge the plans on the fuse so it will be easier to use on the simple soar/ 2 meter size.
 
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dutchmonkey

Well-known member
Finally weighed my plane came in at 7.5 oz with 244 square inch gives me a 3.4 wing cube loading (4.4 oz square foot) this explains a lot.
 

rcwingman

being Ghetto since 2016
step-file?

i will have v2 done this weekend and I will have plans ready on Tuesday with a 50" and 60" wing. i will also enlarge the plans on the fuse so it will be easier to use on the simple soar/ 2 meter size.

you wrote that its designed in solidworks.
 

AdamV

New member
i'm excited for this build! I'm gonna place an order today & copy what is working for you - plus i don't really have any light weight motors, esc, etc. What motor, prop, battery are you using currently. Or, what would you like to to use ideally?
 
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dutchmonkey

Well-known member
A mighty mini power setup is plenty of power and thats what I basically run I got my set up from banggood . I am using a 2 cell 460, 5 gram servos, 6x4.5 prop and a 12amp esc. So on my average 30 to 40 minute flight I use the motor for about 2 minutes at full throttle and when I land I still have more than half of it left. The only change I would like to do is a folding prop to reduce drag even more. I have some photos of fuse assembly and plans snhould be done by wensday.
 

dutchmonkey

Well-known member
here are a few pics of how the fuse goes together. i found it easier to glue the paper template to the foam board with 3m 77 adhesive this is much easier than transferring it.
 

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