Re: Lil satan build, cant decide on a power plant

layback209 Sun Jul 21, 2019 2:11 pm

Thanks Ken, it does. Turns tight, has a nice steady run. I'd say its fully aerobatic. 8s, inverted loops, overhead 8s.... and most exciting it can take some wind!

Unfortunately I had a line issue on the maiden flight which caused me to pat the ground pretty hard, neutral some how shifted on me. Started a diagonal crack from the top of my doubler all the way down to where the tail edge is. Didnt end my day I just slapped some packing tap on and kept going. I think some glue injections should stiffen it up nicely. Now epoxy, wood glue or CA... hmmm

Also survived a nose dive when it went dead stick at the top of a loop and I didn't run fast enough. My fault again, I really should get a timer so I know when I'm about out of fuel.

Jim, maybe think about extending the doublers 1/2" past the tail. I dont think you need to run them as tall as I did. Also think about scraping the kit fuse and make one from laminating two pieces of 1/8" thk balsa with fiberglass in the middle. That would be awesome. I'm going to do that on the next 1/2 profile I build. Apparently I need the little extra strength with how I seem to operate lol.

layback209 Tue Aug 27, 2019 11:39 pm

Here it is prior to maiden flight.
Starting out with a 5x3 and muffler pressure. 25% 1/2a fuel.
Been a while since I doped anything, definitely made the error of of clear coat first then color. O well seems to have hardened nicely. It looks mean!

Probably be a good idea to add a skid wire. engine hangs out a bit, I fly over pretty long grass so it might be ok we will see.

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944_Jim Wed Aug 28, 2019 6:57 am

Wow! That is stunning. Eagerly awaiting flight report.
Where is the balance point/CG?

getback Wed Aug 28, 2019 7:21 am

That is Nice!! What engine did you decide on , can't tell from the pics.

layback209 Wed Aug 28, 2019 10:41 am

Thanks, the cg is at 7/8". The engine is a norvel 0.061 AME.

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getback Wed Aug 28, 2019 11:17 am

Thanks , that should carry the mail really good !! Very Happy

layback209 Sat Oct 05, 2019 12:39 am

Maiden flight is done! Wow is this thing fun. Real point and shoot kinda characteristics, awesome flys like a lazer.

I had some issues with the norvel, behaved as if it was not broken in, just would not rev up... so I stripped it down and yup tight top end fit. Should of trusted my instincts, some times they are spot on.

So I dropped a teedee in that I new ran well. Wasn't able to get the tune quite dialed it, got cut short after the first flight as 2 of the engine mount bolts disappeared and the engine was sort of flapping in the breeze. I can tell this is going to be a fun model. Cant wait to find some more time to keep tinkering with it. Hope to shoot a video once I get it running properly. The teedee was close just needed to be richer.

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944_Jim Sat Oct 05, 2019 1:52 am

Good for you! Congrats on the maiden run. That is always exciting!

Don't give up on the Norvel yet. And don't do anything drastic either (woops, too late). I have a pair of .074s that just about broke me of Norvels in general. They both almost hated to start when they were new...as in "I can't believe I spent too much to buy brand-new from NVEngines" new. In the red and white box-with papers-and warranty-and new smell. Really new! I fought them both on the bench for probably 10 run cycles at an ounce per run. They were still stiff at TDC.They slobbered their grey piston/cylinder coating for a while. But then they stopped the grey slobber, loosened up at TDC a bit, and really became real sweeties!

Now once broken in, they are some smooth, easy starting engines. You can't buy them from me... ever! I even bought up a bunch of extras in different sizes.

Make or buy a bench engine mount and run it off the plane for a few tanks. Instructions for proper break-in can be found here (pg 3) or at StuntHanger.

The TeeDee may do well to have the venturi sleeved. I don't know if I read it here or on StuntHanger, but one of the Cox regulars shows a small piece of brass thin-wall taking the venturi diameter down a bit. This would be a recent post within the last few months, and will improve fuel draw (richer) to make the engine behave more like a Medallion. Or you could slip a Medallion venturi/front cover (whatever that part or body-bit is called) in place with little effort. Either option makes the engine run without fuel pressure reliably.

getback Sat Oct 05, 2019 7:42 am

Hey Jim what fuel blend did you break in with? i just got i think 4 more of difft. sizes ( but it was the o20 TD that i was after Very Happy

Mike1484 Sat Oct 05, 2019 8:48 am

Love my Norvel Big Mig .06 . Took a while to break in but it is worth the time . Put it on a test stand , heat the top cylinder up with a heat gun before starting . The Norvel likes small props . Nice looking Satin . They are a bit small but fly good .

Mike1484

944_Jim Sat Oct 05, 2019 2:23 pm

Eric,
I used a homebrew.mix that works out roughly to 24%N/11%Synth/%9 castor.

Look for "fuel calculator" here or SH. I posted my mix, and the Excel spreadsheet that takes two known fuels and castor to generate percent values on all of it. I know I posted the link to the spreadsheet on SH about a month ago for Motorman...but don't think I gave my fuel values.

I can go out to the garage and check...the bottles are labelled with the quantities and resultant values if you want.

layback209 Sat Oct 05, 2019 11:27 pm

Thanks for the advice, that's really interesting about the teedee. I'll have to read up on it for sure. The teedee sure does go but man is it tough to dial in. Runs kinda ruff on the ground then when launched smooths out and screams, tough to figure out the needle setting with the variation between between the air and being held.

I rolled the dice on the Norvel, I thought man i should really bench run this first (I picked it up used off a nice rc guy). But time constraints prevented it. I was suprised to discover that it wasn't broken in.

I'll be sure to use the heat gun, worked great breaking in rc car engines. Those power plants have insane tolerances.

944_Jim Sun Oct 06, 2019 12:39 pm

Get back/Eric:

See here:
https://www.rcgroups.com/forums/showpost.php?p=39473399&postcount=18

I can email you the altered spreadsheet for 8 oz blends. PM your email for it.

layback209 Wed Jan 01, 2020 10:47 pm

First attempt at hand making lettering. I like how it turned out. I think next time I'll need to make it bigger its difficult to cut the small radis with a knife.

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**Cribbs74** Thu Jan 02, 2020 9:35 am

That thing is going to scoot!

Mike1484 Fri Jan 03, 2020 11:26 am

The lettering dressed the plane up real nice . Now get out and fly that bugger .

Mike1484 Airplane

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