Dp Ultimate 40 First Flights
 

Here it is sports fans,

First flights Ultimate-40 :

1) No drag like big-bro!speeds at half throttle!
2) Lands like big-bro! Oh so soft!
3) Rips a snap and stops on low side!
4) Pancake Inverted flat spins!
5) Will 3D!!! (had doubts).
6) Unlimited verticle @ 5lb 10oz dry!
YS-63 inverted w/ MACS 90 degree adaptor 7.5" flex-pipe.
APC 12x7 w/ Tru-Turn 21/4" jet spinner.
Fut 9404 on ELE and RUD.
JR 3421 on AIL.
Fut 3003 on THR.
700Mah NICD (up front).
7) Rudder has lots of roll coupling on the knife! mix or fly it out!
8) Tracks a path extermely well horizontal and verticle.
9) Good looking airplane!
10) Balanced at 3/4" CG per inst. No weight added!!!
11) Direct sunlight melted the canopy!!!!!!!!
12) Supplied metric hardware actually worked well!!!!!!!!!!!!
FUN AIRPLANE! IT'S A KEEPER!

Dp Ultimate 40 First Flights
 

Sounds great!

Did you make any other modifications to the kit?

Can anything be done concerning the canopy?



Terry

Dp Ultimate 40 First Flights
 

Paint it silver? http://home.earthlink.net/~dojbofh/i...e/happy-3d.gif

Dp Ultimate 40 First Flights
 

Only mod was to side mount elevator servo under canopy
for better pull pull geometry and mount throttle servo just ahead
of stock location for balance. Rudder servo then can be centered
in stock location for best geometry. I guess shade will have to
protect canopy on bright hot days. I tried to reheat but only
worsened condition. A new one is 12 bucks & shipping.
Polycarb plastic would have been a better choice for canopy.
It looks like and melts like byutelene.

Elevator setup
 

Ysman,

Would you post a picture of your pull pull setup. In particular your elevator installation.

Thanks,

Jim

Dp Ultimate 40 First Flights
 

Jim,

Iwould be happy to. I have a friend with a digital camera
and it might take a couple of days for me to get it.
Iam trying to upload some quick cam shots for now.

Dp Ultimate 40 First Flights
 

YSman,

Thanks for the pic. When you said under the canopy you meant it. I thought maybe you had rigged up something under the cockpit floor. That is a good idea. I am thinking of putting the servo under the cockpit floor in the main body tube. In that way I would still have room for my pilot, Tigger ...

Dp Ultimate 40 First Flights
 

More pics

Still trying to upload. Took some good shots of pull pull
arrangements but the file size way exceeds the 80K limit.
Please be patient. This is becoming frustrating. How are
you other guys getting huge pictures on your posts?

Dp Ultimate 40 First Flights
 

Here is my copy cat of ysman. Photo 1

Dp Ultimate 40 First Flights
 

Copy cat of ysman photo 2

Dp Ultimate 40 First Flights
 

Copy cat installation of ysman. Photo 3

Here Let Me Help You
 

Its usually a matter of sizing and optimization. Email them to me and I'll post them for you.

Use my [email protected] adress.

Dp Ultimate 40 First Flights
 

Sent about 10 pic's your way!
Thanks for the help. I am relocating the battery
and putting 1.5 degrees additional down thrust
on the engine. The plane wants to roll on its back
hard during a hover.
ysman

PICS
 

courtesy of ysman and Adobe http://home.earthlink.net/~dojbofh/i...e/happy-3d.gif

http://home.earthlink.net/~dojbofh/i.../Picture01.jpg
http://home.earthlink.net/~dojbofh/i.../Picture02.jpg
http://home.earthlink.net/~dojbofh/i.../Picture03.jpg

rolling two
 

Second set!
http://home.earthlink.net/~dojbofh/i.../Picture04.jpg
http://home.earthlink.net/~dojbofh/i.../Picture05.jpg
http://home.earthlink.net/~dojbofh/i.../Picture06.jpg

third roll
 

bump, bump, bump
http://home.earthlink.net/~dojbofh/i.../Picture10.jpg
http://home.earthlink.net/~dojbofh/i.../Picture11.jpg
http://home.earthlink.net/~dojbofh/i.../Picture12.jpg

cashing out!
 

another one rides the BUS
http://home.earthlink.net/~dojbofh/i.../Picture13.jpg
http://home.earthlink.net/~dojbofh/i.../Picture14.jpg

Dp Ultimate 40 First Flights
 

What kind of cables are those that you're using?

Dp Ultimate 40 First Flights
 

The control cable is double spun kevlar. It is
extremely strong and wont conduct emf.
You should find it or be able to order at the hobby
shop. To attach it you simlpy tie a knot and apply
thin CA. The shrink wrap simply hides the knots.

visioneer_one :
Thanks for the help in posting my pic's.

ysman

Dp Ultimate 40 First Flights
 

ysman,

I see you used clevis on both ends...what brand pull-pull clevis/eye worked well here? I looked at Dubro 2-56 pull-pull but the hole looked rather small on the eye and didn't seem as if I could thread 2 wires through it for the elevator servo.

Dp Ultimate 40 First Flights
 

The clevis assemblies that came with the kit are used
on the servo. I used Sullivan clevises/eyes for the control
horns. Adjustment is made at the servo clevis. The control
horn clevis/eye is CA'd to prevent turn out. I thought the
supplied pull pull clevises were really nice! Just not enough
of them. I am not particular to the described installation
method in the instructions. It is sound but I perfer to make
adjustments at the servo in order to keep geometry as true
as possible. I also did not like the mechanics described in the
installation of the aileron control. I think it limited throw
volume way to much.
ysman

Dp Ultimate 40 First Flights
 

YSMAN,

I might have to look at the sullivans or resort to wrapping around the servo horn as shown. The hitec horn I'm using is HUGE (big red one) so shouldn't be an issue of it making it's way through it.

Question. what difference does it make if you shorten pull cable at servo arm or control horn? end result is the cable is shorter so don't see why that matters?

As far as aileron the only thing I changed was not using 5/16" out from the center of the servo. I used a hole a bit further out to get more throw and changed aileron interconnect rods to 4-40 as many did here.

Just have to wrap up the pull-pull and waiting on the motor to put in and it's ready to go.

Dp Ultimate 40 First Flights
 

It is not completely a matter of tension adjustment.
It is more a matter of how strait the cable is when it exits
the fuselage. Being the exit holes for the cable are closer
to the control horn, it is reasonable to control the amount
of deflection at the servo horn. Most modelers like to take
advantage of full mechanical throw volumes and servo
travel volume in order to set a greater envelope of
control conditions. Also, crossing the rudder cable in the fuse
allowed me to have near perfect alignment to the rudder
horns. The elevator servo mod made also near perfect
alignment .
ysman

Dp Ultimate 40 First Flights
 

I did the "YSMAN" mod on the elevator. Took some extra time but at least I know the geometry is correct and I just cut holes in the covering to get a straight path as the path was not in direct line with the hardwood on the fuse in front of the stab. I just did the rudder but noted the alignment was probably not perfect so I'll just turn my control horn around 180 degrees and see if that helps get it straighter.

Dp Ultimate 40 First Flights
 

So about the Kevlar Pull-Pull on the rudder. Crossing them is a really good idea to get the run as straight as possible. Are you worried about the two "Kevlar Strings" rubbing against each other where they cross?? (it looks like they're running out in the open) Just like anything else, I'd think the friction from them rubbing against each other would weaken them. Being it is only the rudder, you'ld probably not loose the plane if you lost control of that surface....So i guess it's not ultra-critical.


HSH