combatpigg

My Feedback: (3)

Gas Flyer....Us Little Flyers got to stick together...!
My neighborhood has quadrupled in size over the past 25 years and flying a 5 pound plane at 200 mph is getting too risky where I've always flown. Even the local private aviation traffic is becoming more of a liability where I fly.
It's almost time to pack up and move to the high desert east of the mountains.

iron eagel

Cp, Wasn't that around a buck and a half with that little v tail?

MJD

My Feedback: (1)

Ahhh that reminds me I wish I had some decent video of the Toucan. The solo laps over the field looked and sounded like a miniature F3D race. More rpm too. Well, honestly not much more than an MB Profi or the like at full song!

Speaking of which. this would be the real deal as far as a speed twin is concerned.. egads.. https://www.youtube.com/watch?v=IUxu9QfYDFk

oops, sorry gas flyer - back to the topic of your thread. But do watch the video above if you haven't already seen it!

MJD

My Feedback: (1)

That little feller and the Toucan would have good fun together in the air. I'd pack an .061 in my back pocket just in case I needed the afterburner.

combatpigg

My Feedback: (3)

It was close to, but not quite 150.
That engine continues to get better and better with age.
It won't be much longer and I'll be forced to find a different place to fly.
This field is 5 minutes from my house. The next closest 100 acre hay field is 30 minutes from here, but I don't have any permission to fly there.

aspeed

This one is 2 bucks and change ​www.youtube.com/watch?v=u0MN6NHChZI I really like .15s. These don't use any nitro either. I bet your Profi would go better with a pipe too.

combatpigg

My Feedback: (3)

I just gave it the "two handed flex test" and the wing is pretty stiff. I'd have to look at the build thread to figure out how that happened.
Imagine what Gas Flyer's plane would do with one of these engines...?

iron eagel

That CL speed is proof that small blocks can fall into the extreme speed category all things considered.

Since the subject of wing flex was brought up you guys should look into what some guys are doing with CF tow in making spars for thin wings.
Another little interesting trick is "disser" a grid pattern of tow on a bias to the wing this really beefs up the wings torsional strength.

MJD

My Feedback: (1)

I maintain that cracking 200 with the Profi F2A .15 is not going to be that big a challenge. Not a cake walk, but point being the power potential is clearly there if you believe that RC models will always be cleaner than a model on lines. I do.

MJD

My Feedback: (1)

I've sanded a recess in the top and bottom of 1/4" thick SWR wings and laid in 1/4" wide carbon tow/epoxy. Makes a serious difference in span-wise flex and strength.

gas-flyer

Looks like I woke up the nest and some flash backs. The Tripps was based on the CP V-tail sheet wing racer. I glad I'm not the only one that see this as a challenge.

iron eagel

Nice job meeting the challenge.
Several home projects have sidelined me for a bit, this ended up being a wake up call for me.

gas-flyer

Here's to the little screamer, tishhhhhh, glug,glug,glug!!! Ahhhhh

gas-flyer

Hey CP check the XB-70 on the scratch built forum

combatpigg

My Feedback: (3)

Thanks for pointing that out...!
As a creature of habit, I almost never scroll down to that forum.
You did a super-dooper job on that one...!
I tried scratch building a canard years ago and never could get the proportions to work right.
The plane mostly ignored the canard no matter where I put the CG or no matter how much area I gave it. It took a lot of throw for the plane to react and by then the canard was acting like a spoiler.
I think [with 10 year's worth of hindsight] the canard was too close to the wing, but the project was shelved after too many botched attempts to make it work.

Hawk21

My Feedback: (7)

were can I get a set of plans for a swr?

aspeed

I just did a search. There are build threads etc. http://www.rcuniverse.com/forum/1-2-...99256-swr.html Has the Killer Buzz

Hawk21

My Feedback: (7)

Thanks

Pond Skipper

Here is my SWR with a PRF flying with a AP .061 and Profi 1/2A Pipe.

Mini 1/2A Skorch:
http://www.rcuniverse.com/forum/1-2-...ni-skorch.html

First flight on the pipe:
https://www.youtube.com/watch?v=oiLQfuQ4y64

https://www.youtube.com/watch?v=oiLQfuQ4y64

aspeed

Pond Skipper, you need a Profi on that. Scare the state of Texas a bit.

xanaphyst

My Feedback: (17)

Texans are not easy to scare!

Pond Skipper

Skorch II version with a Vertigo.07 converted car engine Profi pipe. /35.5in span 140sq.in

https://www.youtube.com/watch?v=h47Vosb0JFE 1st flight
5x3 / 25.47k / 183w / 27oz static / 28.47 / 81 mph
2nd trip out:
4.75x4 / 23.578k / 144w / 19.3oz static / 26.483k / 100.4 mph
4.5x4 / 23.98k / 127w / 16.96oz static /27.631k / 104.7 mph

aspeed

5-5 single blade should make your day. I found a 5-3 to be pretty useless for speed. All revved up and no go, even on an .049, an .07 is quite a bit larger.

Pond Skipper

Yes the 5x3 originally used to insure fast up and away for the crucial trim flight to my surprise the plane flew well with it as noted by the fast passes vertical climbs was great as expected.
The .07 makes the prop useful. A Norvel .061 spins the prop at 23.8k static vs 25.47k with the .07 for a good jump in power.

A single blade prop would be a good step forward - alas I have none.

Will test a APC 5x5E this weekend static readings indicate the plane will top out around 117mph.
I think the 4.75 x 4.75E may help keep the heat down its still topping out in the low 90's here in
TX. Will post a vid if the results are good I always record all prop testing flights for review.

MJD

My Feedback: (1)

The rough head-math is pitch times thousands of rpm less 5% = 3" x 20k = 54mph, 3" x 25k = 67mph . You can spin the living crap out of a 5-3 and you'll still top out in the double digits.Lots of pull out of the corners though.