Here's a video of the delta flying....I just stole it from another Forum.

[link=http://www.rcuniverse.com/forum/m_3195180/anchors_3195180/mpage_1/key_/anchor/tm.htm#3195180]click here[/link]

Looks like a real floater, huh ?

SLLLLLLLLLLOOOOOOOOOOOOOOOOOWWWWWWWWWWWWWWWWWW but NIIIIIIIIICCCCCCCCEEEEEEE !


Looks like your are going to have a ball . GL

Dave,
You'll love the Delta Fighter 90. I've had two and they're the most fun of anything I've flown in the last five years. I'm using a OS91FX with a 13x7, and waiting on a 12x10 from Tower. It's faster than most planes at my field of about 150 members. Definately one that causes people to stop and watch. Landings really make one look better than they are. Very graceful, nose high, slow, precice.

The other post warning of weak firewall is spot on. It must be strengthned or you'll end up tail heavy as the engine departs.

I had to add 6 ounces of weitht to the tail, but my 5-cell battery was just right in the very back center of the plane. Looking at my first (crashed) plane, I found a pocket that would hold the battery with just a little bowing up of the balsa. Remove the monocote bottom rear center and you'll find it. Just ahead of the trailing edge.

Also watch out for the nose gear strut making a hole in the fuel line. They want to occuply the same space. Careful placement cures the problem.

Hobby People has this ARF on sale for $160, so I put in an order for another one.

I'd like to use a Webra Speed 120, but don't know if it would fit. What do you think?

Another tip: Beware of props longer than 13 inches. They will quickly be missing their tips. That's one reason I'm trying a 12x10.

Another tip: Heat and twist your main landing gear 180 deg. so the axels point OUT, not inward. This widens the stance and gives much more stability on the ground. You WILL taxi tip all the time otherwise and the prob goes every time. Heat just enough to allow the twist. No more or the temper will go away.

Let us hear from you about how it goes.

ArthurD....I'm concerned about the landing gear....it's way too narrow.
I was thinking maybe about some outriggers out on the wingtips to keep it
from tipping....windy conditions would be bad. I might just bend up new
gear, and kick the wheels out about 4" on each side.

Dave.

Well, I got 'er done....might try to run the engine tomorrow. The weather has been
crummy, and the field is closed again....the dry lake is wet again. []

FBD.

Just curious, who does this lake belong to ? The city ?

Nice Vortex.

I guess this is what they call new plane first flight jitters. Better know as NPFFJ

Mr. Fly they have been concealing this type of sickness for a while. The help contact number is 555.555.5555

All kidding aside good luck with your maiden and fly the big delta like it escaped from the depths of hell.


RCF esq.

The Dry Lake belongs to the department of Parks and Recreation....they
have park rangers that patrol the place. There is no fee to visit there, but
they have some strict rules. There is a racing association there also , the
S.C.T.A. (so, cal. timing assoc.) that runs speed cars and motorcycles like
at Bonneville Utah salt flats....only on a smaller scale.

The Delta is ready for action, I think the ABC ASP engine should run good. I
have a 13-7 on it, I believe in letting the two strokes turn free and easy. I put
a servo on each rudder to enable the air brakes, it needed the weight back
there anyway....it is a touch nose heavy....but that is good. Even though it
is pretty fat, I think the Vortex should move out pretty good....it feels light.
I'll weigh it when I get a chance.

Dave.

How did you finally brace the Rudders? Since you were only going to need the braces when the Airbrakes are deployed, I'd suggest bracing then against then selves. Put the brakets between each rudder so when the brakes are applied the rudders press inward against each other. That wouldn't add any stregth btw the Rudders and the fuse though.........How'd you end up doing it?

The rear fins don't need bracing....they are solid wood, and fit down deep
into the wing. When they are solidly epoxyed into place they are very strong.
The air-brakes are kinda just for show, I think....and if I used a 90 degree
deflection in the rudder, it left too big of a gap in the hinge line. The rudders
are too small to any serious braking on that big a plane.

Dave.

Nice job on the plane. It looks like it might do a little help on final or in slow flight configs. Every bit of drags helps from time to time.

Thanks for the good pix!!!

Yes....it might be fun to hit the brakes to slow it down a bit, but certainly
no fancy airbrake coming straight down. The plane came in at 7lbs 10oz.

Dave.

I am gone for a few days and look what happens....Double-rudder-inward-airbrake-things!

Dave- Where is the trusty MA nylon prop.?

Also, I am available to test fly your new airplane for you all you have to do is pay for my gas and lunch!

On a serious note it looks great and I am sure the engine will be dialed also-- Good luck!

Hi, James.....I'm digging in the MA box now.

I had trouble with the engine....my first ASP. It banged like heck on the 15%. It
didn't like it at all, and it blew a new Miracle plug on the first run. I got a fresh
can of 5% PM and added 3 ozs of castor to it....that was better, but it was
still knocking. I put a K&B 1L in it (med/warm plug) and it was a little better. I
had 20% oil....almost half castor.

Then I put in a #4 cold Rossi plug,and it was pretty happy. I still had to richen
the low end a tad to keep it from knocking coming up off idle. It was a subtle
noise, but it was there....you know my ear is keen for the engines.

I might just get another head gasket and de-compress the engine a tad, that
was rediculous. It doesn't seem like I hurt the motor....good thing it was nice
and tight to withstand all that detonation. It would probably run just fine on
0% nitro. Basically it runs like the Rossi .45's....low nitro and cold plugs.

FBD.

Geesh, the ASP's I had (many years ago) ran on anything I had handy including rubbing alcohol! JK on the last part---

I can never find FAI fuel, but I have Moki-5% that has some extra oil I recall... You know any minute someone is gonna come along and tell you that you are a crazy American who runs nitro above 0%

You have the baffle in that mffler still?

Take care-
James

It has one of those extended mufflers, like the Magnum .91's. I didn't check
for a baffle....it's not all that quiet.

It's only turnin' 10,800 [X(]

Dave.

I think I found the problem....a defective ASP Miracle Power Disc.

....some one had cleverly consealed it in the muffler. [sm=stupid.gif]

Well, I got two maiden flights in today on the delta....it was a kick. [sm=thumbup.gif]

The delta really loses altitude in the turns because of lack of fuselage (I guess)
and it was a bit "different" in flight....the landings were perfect. The thing glides
in and slows perfectly, touching on the mains nose high. I didn't try the air brakes,
I think they are cool....but that's about it. The nose wheel was coming loose and
changing adjustment....I have to grind a flat on the shaft. Other than that, no worries.

I'm going to prop it down a notch too....the engine isn't completely happy yet
and it doesn't need all the speed it has on tap. All in all, the plane is a success
and a worthwhile dive into the World of Delta's.

FBD.

FBD,

Glad to hear you had a good maiden. Deltas are great.

Pete

Good news Dave! How about the Cessna? Did you tip-stall it on the downwind maiden turn?

The lakebed in pretty good shape?

Dave,,

have you tried the speedbrakes ?

Yo, Razor....

....The Cessna was cool, but the cheap plastic nose wheel steering arm snapped
on the first landing...the wheel turned sideways and dragged like mad....finally
the plane did a nose-flip over and came to a halt....up side down. I was not pleased. []

It flew well, and pretty fast too, but with the flat bottom wing, it climbed like
mad with an increase in speed. Once again, I found out the best prop for the
Magnum .91 in a sport plane is the Master Airscrew 12-8 K series wide blade.
See how neat the prop looks, compared to a real 182.

FBD.

No, Strykass....the flying wing slows down nicely being so thick. I flipped them on
after I had touched down on the second flight, but the wind was picking up, and
I couldn't tell much about how the plane slowed with the air brakes on.

The engine is still not happy for some reason. I has a 13-7 Zinger on it. The
manual only calls for a 12-6....yes that is correct, a 12-6. [X(]

That's a .60 engine prop....and it's only turning 10,800 on the 13-7.

So much for "90 size power in a .60 size case". [:-] I put a 12-7 Zinger on it.
My .60 size OS RF turns the 12-8 Zinger at 11,400....giving about the same
power as the .91 ASP. The OS, of course, is a long stroke....and runs on 15%
nitro. I'll give the 12-7 a try, it looks small on the plane.

You can tell the ASP is just not "on song" in flight. I think it has too much
compression....you should have heard it detonating on 15% fuel. [X(]

Any thoughts on that Strykass ?

Dave.

Mmmmmhh have you tried other glow plugs ? Did you try the std OS 8 ? IMHO a good starting point ... then move on to Rossis if not good... Try less nitro perhaps too...
The point is to find the good plug/nitro %age, as you probably know.

I've never heard about engine gurus using head shims on ASP .90s ...

If nothing works, then why not put the baffle back in place, I know this is stupid, it shall not solve your problems, but... one never knows...

Dave- Could have had a worse maiden flight so that seems like a minor problem- It sure looks sharp! I really like the "K" prop. on there, it does look scale... (What engine is in the Cessna again?)

You remember that Rossi-60 that was "Augered", it will turn a 12x7 APC @ 13.4K on 5%, that'd be interesting on your Zagi, err, I mean Delta Vortex!

Seriously when should we have another El Mirage Matsre Airscrew fly-in? I know you fly there with some buddies pretty regularly (when its dry-) but it'd be fun to plan a little wing-dinger and invite any local revvers out---

Strykass- I been wondering for a long time, what does your call name mean?

Cheers!
James