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Jun 16, 2019, 02:05 PM
Nitro User
1/2A Nut's Avatar
Holy MOLY !!!! Major Green Thumbs passed on CEF
Thank you KIM!!!!!!


Flashback Moment to "Fall S M A L L 2018" (2 min 55 sec)


Per video best level pass:
43,874 rpm flown with a fiberglass VY 4.49 x 3.15 / 131 mph pitch speed
At the end when the engine leaned out and quit it peaked at 51.3k rpm!

Static at startup:
32,984 rpm / 19.75 oz thrust / .33hp - 246.2w / 98.3 mph pitch speed


5 popcorn salute!
Last edited by 1/2A Nut; Jun 19, 2019 at 05:13 PM.
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Jun 17, 2019, 02:30 PM
Registered User
Yeah I think it was flying a bit rich there. That is the test flight prop, the engine runs like a bear and needles easily on it, but it definitely clips the top speed. I remember taching 32.5-32.8k typically. I don't remember Tony flying it twice, but he must have because he was flying on that iPhone video pass you analyzed last fall, and I had tossed my iPhone on the grass after the launch.

The piped Profi still has me flummoxed, and I haven't used that word in a while. Still struggling. F2A .15's seem quite agreeable by comparison.
Last edited by MJD3; Jun 17, 2019 at 02:40 PM.
Jun 17, 2019, 07:52 PM
Registered User
crawf56's Avatar
I want to emphasize that the craftsmanship on the high speed model was a mixture of performance and beauty. Stunning attention to detail; I guess 130+ mph requires it!

And it was an ARF?!? Wow.
Jun 17, 2019, 09:53 PM
Registered User
Then there is Lynxman's Free Model (downloadable 3d printer STL file)
It only does 103 mph though (onboard GPS).
Nucking Futs? Yes! (7 min 49 sec)
Jun 18, 2019, 04:09 PM
Registered User
Quote:
Originally Posted by crawf56
I want to emphasize that the craftsmanship on the high speed model was a mixture of performance and beauty. Stunning attention to detail; I guess 130+ mph requires it!

And it was an ARF?!? Wow.
The "electric guys" push the beejeezers out of these little pylon racers.. high 100's. I've sorta tongue-in-cheek decided my life quest should be 200mph with an .049. This one won't make it but maybe the next one will.. whatever it turns out to be.
Jun 18, 2019, 05:44 PM
Registered User
Could you tell us a bit about the motor , prop , and fuel set up ?

Mike1484
Jun 18, 2019, 06:27 PM
mjd
mjd
MikesRC
Quote:
Originally Posted by Mike1484
Could you tell us a bit about the motor , prop , and fuel set up ?

Mike1484
Yup,no sweat.

It is a Profi Rambler .049 - intended for proto speed or FF. Full blown ABC, BB 1/2A motor. I've never handled an .049 with this much hp.. it's a riot. It is also very easy to run and manage if you mind the normal things. I settled on crankcase pressure, by installing a small fitting in center of the backplate, and put a restrictor in the line to the tank. The start you saw there is typical, off it goes. I also managed a one flip start on one of those flights, but the prop has brittle edges and better just to hit it with the Hornet starter.

It is designed for 10-% nitro fuel, and it runs great on SIG Champion which has the requisite 20% total oil.

The tank is a homemade 25 (30?)cc bubble-free bladder tank. I use latex balloons (part of them) for the bladder, and although latex tubing is known to break down over time with glow fuel, oddly these balloon bladders seem not to suffer. I soaked a helium balloon in 50% nitro fuel for 2 weeks and it was fine after, A significant difference is that latex tubing for glow fuel bladders is stretched pretty much to the yield point, and this gives the fuel a much better chance of attacking it. These are never stretched by comparison.

The prop, so far, that hauls the mail is a CF Eliminator (just Google Eliminator props) E-3, nominally 4.1" x 4.5".
Jun 18, 2019, 07:46 PM
Nitro User
1/2A Nut's Avatar
You can go fast with a simple Cox engine.

Last edited by 1/2A Nut; Jun 19, 2019 at 02:44 AM.
Jun 18, 2019, 11:05 PM
EB-66C Team Member
xplaneguy's Avatar
Thread OP
Well...so much for having a thread on the SMALL 30th!

Why does so many of these threads turn into 1/2A speed threads? It's a good way to push people out of this forum, I guess? Just sayin!
Jun 19, 2019, 06:51 AM
Registered User
Agree completely !
Jun 19, 2019, 08:33 AM
Registered User

Jodel d-9


Starting with a Midwest kit originally designed for single channel rubber escapment
Plans are for three channel with a PAW .06 diesel
Not a bad kit for its age
Jun 19, 2019, 08:52 AM
Nitro User
1/2A Nut's Avatar
Quote:
Originally Posted by xplaneguy
Well...so much for having a thread on the SMALL 30th!

Why does so many of these threads turn into 1/2A speed threads? It's a good way to push people out of this forum, I guess? Just sayin!

Here are two example threads posted in the 1/2A forum, I see no issues.

https://www.rcgroups.com/forums/show...ight=S.M.A.L.L

https://www.rcgroups.com/forums/show...ight=S.M.A.L.L

Links to photos from the two threads above:
https://www.rcgroups.com/forums/thum...=threadgallery

https://www.rcgroups.com/forums/thum...=threadgallery
Jun 19, 2019, 09:07 AM
Registered User
Fair enough.. I won't reply to any further questions on the speed model.
Jun 19, 2019, 09:16 AM
Nitro User
1/2A Nut's Avatar
Quote:
Originally Posted by MJD3
Fair enough.. I won't reply to any further questions on the speed model.
Mike,
Hang in there I appreciate your knowledge and contributions.



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