Flyboy Dave

My Feedback: (21)

My first delta...too big to be fast, but cool anyway. I just started putting it
together. Not much to it....engine, tank, wheels, two elevons, and two
rudders. I don't know what to put in it, it calls for a 90 two stroke, or a
90 fourstroke. The instructions say over and over not to overpower it.

Who....me ?

FBD.

Razor-RCU

My Feedback: (50)

Uh oh.... (Now I see it Dave!)

Those are supposed to be great fliers, have you seen one fly cuz I haven't ??

How about a 1.08?

I finally got an SUV so I have more room to pack up for El Mirage-

Flyboy Dave

My Feedback: (21)

I haven't seen one fly either....I was going to put the 1.08 in it, but might
go with an ASP .91 ringless ABC. The 1.08 weighs a ton.

The plane is big....the .91 looks like a pip-squeak. [X(]

Razor-RCU

My Feedback: (50)

The ASP seems like a good choice.... How is the CG situation? The 1.08 would be a kick, but I know what you mean with that bulky engine up front-

The wing chord is fat yes? I was thinking you probably had a Rossi-90RE laying around and pipe but if the wing is that fat I guess you may as well go for the easy running ASP-

Do you have a G-90? I have fallen in love with mine, just can't beat it for the $

Flyboy Dave

My Feedback: (21)

I have a slug of .90's, but the ASP sems to be the tamest of the bunch. The
wing is really fat....the instructions show the S.T. .90 in the nose !

I don't have the G-90, but the ASP fits real nice, and should be a trouble free
power plant. The muffler on the 1.08 is a clump. I do have a YS .91FZ indabox.
That might work....it uses an upright engine anyway. I'll size it up tomorrow
and report.

Dave.

Rudeboy

Holy cow Dave! That thing looks HUGE compared to the little ASP...

How about a Saito 150 or something on a 13x13 prop...?
What does the airframe weigh? Looks like it's gonna be a floater.

Flyboy Dave

My Feedback: (21)

Rudeboy....the thing is 4" thick, but only weighs 2 lb 14 oz !! That is the
barebones airframe....it should be "King of the Floaters" if I don't get it
too heavy. The YS .91 FZ looks great in it, but it has way too much power.

Dave.

Mike Connor

My Feedback: (5)

A friend of mine had one with a Jett 90 for power. It flew well but not real fast with the fat wing, even with the Jett. I did fly it for a minute and I would have to rate it good overall.

Flyboy Dave

My Feedback: (21)

Thanks Mike....I think you're right. With just about the fattest wing in r/c
modeling....nothing would drag that monster much past 90 on a good day.

This Saito 90 flat twin is cute, but probably not much for performance....
might be better for a Cub or something.

I'm still digging in the engine closet.

Dave.

HaveBlue

Hey Dave, I think that Saito twin gives a menacing look though!!!!

Crazy4Flight

My Feedback: (540)

I put one together for a friend, stuck a SuperTigre .90 in it and it balanced fine, flys great, yes it is more of a floater than a speed demon.

Flyboy Dave

My Feedback: (21)

Crazy....did you use two rudder servos ?

Dave.

RC-Captain

I would bet a OS .46 would pull it around with authority. After all, my trainers all weighed in at about 5.5 pounds dry and were almost going vertical under 8 feet with the .46 . This wing has no drag compared to a trainer. GL

HavinFun

My Feedback: (4)

I built this one for a Friend a couple of years ago, it's a Bruce Tharpe Delta Vortex. I believe these two deltas have the same dimensions & power requirements. In the BT manual it says top speed is just over 90 mph in a dive using a .91 engine. I used the OS .91FX. This delta is a floater & easy to land but crack the throttle open & she moves faster than most sport planes, unlimited vertical with this engine. I forget what prop I used, might have been a MA 14x6. I remember adding an ounce or two of lead on the tail to balance.I used two rudder servos so I could deploy the speed/dive brakes, both rudders will deflect outward. I remember setting up a couple of mixes to get the rudders to deflect outward without it affecting the steering gear. The radio I used was the Futaba 8uafs. Hope this helps.

Flyboy Dave

My Feedback: (21)

Are the rudder brakes effective ?

Dave.

Razor-RCU

My Feedback: (50)

Whoa! Check Dave out with all the engines- [8D] That dude has a lifetime supply of RC stuff, and if you need an engine tuned he-da-man!

I would personally go with (4) Cox Black Widow .049's mounted on pods along the LE of the wing, but that is just me, Mr. Vegas!

Keep us posted Super-Dave


James

ira d

I have a super tiger 75 in mine and it was way nose heavy with that
engine a bigger engine would mean more tail weight.

I would suggest beefing up the fire wall mine came loose and had to
be redone, otherwise the delta fighter flys ok but will really bounce
on landing if you come in a little to fast, something else i notice is that
the stock tank location puts the center of the tank to far below the
carb.

Flyboy Dave

My Feedback: (21)

Thanks Ira....I'll check those things out. The ASP is a 90 in a 60 size case.
Weight-wise, it may be the winner.

Dave.

Flyboy Dave

My Feedback: (21)

Yep....the ASP won out, it fits perfectly, and looks much better when mounted
in position. I'm using the clear "practice" cowling for fitting everything up. The
cowling comes right to the edge of the carb, and all the hot parts of the engine
are sticking up in the airflow. I'll weight it and see how heavy it is....I suspect it will
be a tad lighter than the Super Tiger.

I checked the firewall, and it has triangle stock on the sides only. I'll fix that, and
put a light coat of epoxy all over the tank compartment.

FBD.

Strykaas

FlyBoy,

Nice setups with all these engines

By the way, I did not know a clear cowling was supplied with this kit. Is it an option ? Or a recent add_on ? SalmonBug did not have any on his (check his thread).

Regarding rudder brakes, he told me that they were not that much effective, but really add to the cool factor . Deltas can be slowed down much more easily than other airplanes by just increasing angle of attack, as you probably know.


I have a video of a low pass with rudder brakes fully deployed...

Flyboy Dave

My Feedback: (21)

Strykaas....this one is an ARF. It was the last one Cermark had. I can see
why the deltas are so popular, there's not much to them, and they fly so
well. Maybe only the ARF's came with the clear cowling.

The backplate on the spinner is black, the prop looks small but it's a 13-7.
I got the mount, the engine, the tank in, and the cowling cut yesterday, as
well as the throttle and nose wheel rods. All I have left is the elevons, rudders,
servos, radio and wheels....and it's done. I'll use the airbrakes just for kicks,
especially if it needs weight in the back. I might put a brace in between both
rudders too.

Off to the hobby room.

Dave.

Rudeboy

Dave... how are you going to use the rudders for airbrakes with a brace between them...?

Flyboy Dave

My Feedback: (21)

....the rudders deflect "out". I was going to use a brace like these, just one
on each inside vertical stabilizer....to shore up the fins. They will get a lot of
stress if used as airbrakes.

Even with these on the Ultra Stick....the rudder could deflect 90 degrees, if
nothing was in the way.

The fins just glue into a slot, they could easily be bumped and damaged in
transport.

Dave.

Razor-RCU

My Feedback: (50)

I would put LG on both sides so I could land inverted- May as well put some fins on the bottom also---

Also, Note to mod. please remove thread from speed forum and place in old-timer floating forum-

Oops, Dave IS the mod.

Flyboy Dave

My Feedback: (21)

....hah hah, I see you've day-dreamed about the double sided "up-side-down"
plane too.

Dave.