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Very Hot Topic (More than 25 Replies) Another Simitar (Read 366 times)
thymekiller
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Re: Another Simitar
Reply #33 - Jun 20th, 2022 at 4:32pm
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Try again, it's after 5 now.  Sorry about that.

SOOO stupid I have to pick a time and it shows as private till that time. Why do I need to do that? used to just post when you posted it. Don't need a PREMIER time.
  

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pb_guy
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Re: Another Simitar
Reply #32 - Jun 20th, 2022 at 3:40pm
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thymekiller
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Re: Another Simitar
Reply #31 - Jun 20th, 2022 at 3:37pm
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https://youtu.be/yvRpJirXX8E

https://youtu.be/qykQq38mvKg

    I HATE computers and I HATE utube.  You have to wait for the premier time to see it, 5pm,  cant just post, it has to premier.  Spent 10 times more time online than I did building.

   I struggled with porpoising till I added a ridiculous amount of positive incidence to the tail. The last flight was much better than the rest. Wind would quit, then blow, then quit. You can see it in the last vid. The other vids shows the tail pulling the plane down. I think both wings are at -1 degree incidence right now. Crazy. Will measure and test more later. I need to rig up a wing tool and find or replace my scales. Mommas kitchen scales are better than nothing, but need at least 2 places past the decimal.
 
  Good thing is, the cap setup is PLENTY big for an embryo. I only charged 45 seconds, but can charge more and get more power. So, yea, the 6f unit from Joshua Finn is plenty to fly small planes. This one is 20 inch span and weighs about18 grams all up. Plane is around 11 grams.  They offer a bigger unit and my next plane will see how big I can go with that.  Best results are when you let it all cool down between flights. 5 minutes is fine. I will rig a better way to charge and launch and that will enable me to lighten the rig holding the cap. I lengthened the wires and moved the cap back to help balance. Might go back another 1/8 inch, just for fun. 

    I do not feel like the prop angle played as big a role in the flight as It would have with a rubber powered prop. I will do more testing on that later. As is, I guessed at about 3 down and 2 right.

    Vacation is over for me. I leave tomorrow. Now that my tools and supplies are better organized, I can get some build time in between trips. Still not sure what's next, but will probably be a sport old timer type.

Thanks for following along. Please feel free to add any questions, comments, or suggestions for future flights.

  

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Sky9pilot
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Re: Another Simitar
Reply #30 - Jun 19th, 2022 at 8:48pm
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This Topic was moved here from Embryo Endurance Inside-Outside [move by] thymekiller.


I think/hope I did that right, lol.

   I got some 30 gauge wire in the mail yesterday. Hope it's not too small.
Sodering the extensions on. I trimmed the cap mount and moved it back to compensate a bit for the play do I used to balance it. I will try to fine tune the glide as soon as I can.
  

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Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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thymekiller
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Re: Another Simitar
Reply #29 - Jun 17th, 2022 at 8:05pm
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1/8th. square.
Pretty sure I took at least a whole degree or more out of it. The main wing showed to have negative incidence also. Distortion in printing maybe?
  

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Sky9pilot
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Re: Another Simitar
Reply #28 - Jun 17th, 2022 at 7:25pm
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Thyme... was that 1/8" sq or  1/8" of 1/16" sq?  Just curious?
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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thymekiller
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Re: Another Simitar
Reply #27 - Jun 17th, 2022 at 7:18pm
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added 1/8 square stick under the TE of the stab and solved the problem. Now I just need the electric wire and I can REALLY wreck it, lol.

I recovered the stab because of the warps when I used ez dope incorrectly. The warps did not go completely away after using nitrate dope. I bet the added weight and tail warp was/is the the reason for the needed reduction in incidence.  Still going to try to lighten the cap mount.
  

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thymekiller
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Re: Another Simitar
Reply #26 - Jun 17th, 2022 at 3:39pm
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  Glide did not improve at all. Got maybe 20 ft out of it a few times, but nothing really great. Nose heavy OR tail heavy, she just wants to porpoise and nose in. At any speed or launch angle, the tails drops hard, then stall, then nose in. Next time I will re draw the wing incidence. I'm going to try under power, first, and then will probably take out some tail incidence. At least 1 or 2 degrees.
  1 change at a time. That super heavy cap mount I made could also be an issue. Might try to lighten that up.

  On a better note, I spent most of today looking for my next victim.  Will be a sport free flight. Still narrowing it down. Outer zone kept me glued to the couch all morning, lol.
  

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thymekiller
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Re: Another Simitar
Reply #25 - Jun 16th, 2022 at 7:24pm
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Tom, Good plan. Thanks.
  I wasn't sure at the beginning, but it seems to be working out that way. Sorry. I did not have a whole plan when I started, lol, I just knew I had to get started. 

  I will try to glide it for balance, If the wind cooperates. I ordered some wire to extend the leads, not sure if it will arrive before I have to leave.

Weighed it on kitchen scales, the plane, without rubber or prop, is 11 grams. The power system, is 7 grams. Kinda heavy mounting system. Wish I had done different.
Live and learn. Should still be able to fly, I hope.
  

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Sky9pilot
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Re: Another Simitar
Reply #24 - Jun 16th, 2022 at 1:35pm
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Thyme ...looks like this is going all electric so I might move it to the electric board if it does go all electric.  Wink
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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thymekiller
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Re: Another Simitar
Reply #23 - Jun 15th, 2022 at 3:56pm
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Got my shipment today. 2 quarts of butyrate. From Wicks Aircraft
Soon I hope to get a quart of butyrate thinner from Brodak control line supplies  It's been shipped. These guys have A LOT of cool stuff like engines and pilots. They have spoked wheel kits and jigs. You folks probly already knew that tho, I forgot.
The nitrate stuff is already here and I used it. 

  That will be enough to make at least a half gallon of butyrate and a half gallon of nitrate. I'm probly on that watch list now...lol  I think as long as people cover real aircraft with the stuff, it will always be available, if you buy enough of it. Odd that I can buy it in 5 gallon pails, but not so easy in quarts or pints. Shipping is an issue over 1 gallon.

  Also, I think I'm going to join the R/C groups forum. There's a lot of great stuff there and most folks seem pretty kind to each other. Lots of helpful info over there.
  

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thymekiller
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Re: Another Simitar
Reply #22 - Jun 15th, 2022 at 2:20pm
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Excellent info and links !!!
Thanks to both of you.

My big setup is a 10f and I think the one I'm trying on this is a 6f. ?  Both use direct drive pager motors, one smaller than the other. There's no room in the nose for a geared setup.
I cant find my scales so I will order a new set and give all up weight.   
Again, not reaching for the stars just yet. I just have a strong need to fly something,....
  

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Sky9pilot
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Re: Another Simitar
Reply #21 - Jun 15th, 2022 at 12:14pm
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Most interesting info on "supercap" power.
Here's the link to the geared motor setup he mentions in the article: geared motor click here

Here's the link to the Stealth Squadron FAC Club: Click Here

I'm posting Sam Bauer's article here as well.  All the above links are well worth checking out as well!

I'm definitely checking this out!
Sky9pilot
  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Re: Another Simitar
Reply #20 - Jun 15th, 2022 at 8:54am
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thymekiller wrote on Jun 14th, 2022 at 11:44am:
If you have a favorite thread about cap power, feel free to link it here, if you wish.


This is the best of the supercap threads I've been following:

https://www.rcgroups.com/forums/showthread.php?4032135-Supercapacitor-Power-for-...

Sam's been doing some interesting stuff.

Mike
  
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Re: Another Simitar
Reply #19 - Jun 14th, 2022 at 7:55pm
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built a box to store and travel to a field. Scrap foam, ect.
The battery box in in a foam case at the bottom.

Vacation is almost over. I hope the wind gives me a chance to fly. Has been brutal hot here lately. The wind saved us from baking, so I hate to complain. Last week was perfect.
  

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