raron455

My Feedback: (38)

Ok, SO I am finally finished with it, setting the throws up on the control surfaces,, It is a super nice jet, and I really like it. Cant wait to get it up in the air,, I have a jetcat p120sx in it. as far as putting it together, there were some challenges, I upgraded to all Kevlar jet-tech tanks, I ran the main fuselage tank, and the saddle tanks, NO WING TANK,, the saddle tanks make using the inlet duct/bypass system a complete pain in the a-- .
I went with the dreamworks pro-link gear, and let me assure you they are NOT a direct fit, you will spend some time cutting grinding and sanding. I actually had to add light ply to the mains to raise them up, They are in, and I don't think I will ever have any trouble out of them, so hopefully all the work pays off. I am posting a lot of pics of mine,, I am really proud of it,,, I did my best to keep the install as clean as possible. I painted the inside of the fuse with hammertone paint, to protect it all. It looks really good. I am running two FROMECO LI-ION 2600mah packs for the flight controls, and a JETCAT 2500mah pack for the turbine, I have two airtanks up in the nose, and foam all around to hold them there,,, I balanced the plane Upright with the gear down, UAT full, and a little fuel in the main tank as I know I will never empty it. I set my balance point right at 232mm from the leading edge, and the plane level on the stand will start to fall to the nose, so I think it is a good safe balance point, once I get it up in the air I will find out. I DID not have to add any weight to the jet to get it to balance. I am running the JR 8411s on the elevators, a savox 1256tg on the rudder, HITEC 7954s on the ailerons, HITEC 7985s on the flaps, and a hitec 7954 on the nose, WIth the exception of the brand new JR servos in the tail, I had these servos from another plane and they are proven.

raron455

My Feedback: (38)

and some more pics,,,

paulhat

You UF looks awesome raron455!!
Should fly perfect with the 120 in it.
I hope you enjoy yours as much as I have mine. Such a fun jet to fly.

Paul.

txshan130

My Feedback: (114)

I'll take the tanks if still available

Dieselman1220

My Feedback: (25)

Looks awesome Ronnie! Wish my first jet install looked half that good

raron455

My Feedback: (38)

Thanks for the compliments Fellas,, Between reading and Youtube I was able to figure out Fmode settings on my dx18, SO I have the jet balanced at the recommended 232mm, and have set my radio EXACTLY to these settings, ( THANKS PHIL) I have a flight mode/.take-off mode/ and landing mode. I used the corners of the control surface edges to take my measurements. I fly with triple rates , and I have the ailerons rudder and elevators right at these above numbers on my mid rates, that way if its not enough, I can flip to high and get some more, or if its too much I can click to low rates and have less.. I am running the 40% expo on both mid and high rates,

I had knee surgery Tuesday, SO,, Once I get mobile I will be ready to fly this plane, I cant wait..

txshan130

My Feedback: (114)

Be ready to put in a lot of down elevator when flaps are deployed...Mine wanted to go straight up with full flap!

cbooth1979

My Feedback: (22)

Raron 455 your Flash looks great! Is everyone balancing upright/wheels down? I thought it was wheels up/ upside down? Thats how I did mine anyway...I think it really matters most to see how it flys in a 45deg up line inverted right? Yes, this model requires a large amount of down elevator with flap for sure.

-Carl

Dave Wilshere

As always, how you balance it does not really matter, it just needs to be in a safe position, then you fly it. Yes, its nice to get it close straight off so not much moving around on equipment, but everyone has a different idea of set up, so adjust after.
I've set up two UF recently for inexperienced owners and they get on fine with my settings, but there is no right, its what suits you. Phil's settings would feel unbalanced to me, but adjust to suit your thumbs
Overall weight makes a big difference too, I guess those tanks are heavier than stock, extra tubing over a stock set up etc. Sometime I'll take some scales to a meeting, we had 7 or 8 UF at the Throckmorton JMA event last weekend it would be interesting to weigh a few models.

Dave



Dave

DrV

My Feedback: (2)

My UF with tanks empty and BVM UAT full with a Merlin 140x is exactly 23Lb. I have the new C-40 Behotec Electric gear with electric breaks. My CG is at 230mm. I found manual throws too sensitive.

raron455

My Feedback: (38)

Maiden Flight Today,,,,Sorry no video no one had a camera and the wife was at work,,will get some next time though..
OK,,, so today was the day, I am still sore from my knee surgery last Tuesday, but I am mobile, just barely, and I have a great friend who did all the heavy lifting.
I went over the plane again from front to back, did all my taxi adjustments and brakes,, every thing ready to go,, Topped off the fuel/air/batteries.
Set it on the center stripe, and here we go,, the plane is balanced at exactly 232mm I notice at that the nose tends to bounce, not a big deal but it does bounce,, had to make minor rudder inputs to keep it straight, and up we go, took off fantastic, got it up and had to trim, had to add 3 clicks of down and two of right aileron,, That's it,,, I know this has been said a hundred times in this thread, but the plane literally flies like it is on a set of rails, made some passes got comfortable with it, did some LOOOOONG slow rolls, only little rudder/elevator input and it stays level. THIS IS ABSOLUTELY AN AWESOME JET,, I have mine set up on 3 flight modes, FLIGHT/Takeoff/ and landing. I went to take off mode and made my elevator trim adjustments with the first stage of flap (27mm) flying level, then switch to full flaps (75mm with 6mm crow ) made my elevator trim adjustments, BOTH MODES NEEDED DOWN ELEVATOR, flying level, switch back to flight mode and fly some more, loving it.
My timer went off at 6.5 minutes,time to land, make my gear pass all good, make my downwind pass,switch to first stage (takeoff flaps) make my turn to base flip to landing mode (landing flaps) level it out, right over the end of the runway about 10-15 feet high, and pull throttle all the way down, jet floats on in gets almost to touchdown with a good NOSE Up attitude, flare it a little and the mains touch first, nose is still about 2 inches off the ground rolls about 10 feet nose touches down, put the brakes on make slight rudder inputs to keep it straight, and come to a stop, guys behind me start clapping and hollering, taxi in, turn it off and cool it off. Open the canopy and I see that I am still 90% full of fuel in the main tank, the whole flight used up what I had in the saddles and just started to get into the main,, I have no doubt that If I had to push it I could get away with up to 9 minutes of flying with good throttle management..Im going to increase my timer to 7.5 minutes and keep it there though, that leaves wiggle room for any possible trouble..
The ultra flash is such a great plane, it truly is an enjoyment to fly,,, I ended up putting three flights in today, and many more to come,,
Thank you Comp Arf for such a great plane, and thank you to everyone on this forum who has invested a lot of time in this post who takes time to help with advice, especially Dave Wilshere,it is appreciated by all,,,

Dave Wilshere

Ronnie, very happy you have joined the 'club' With your fuel set up you should be able to do an easy 9 minutes, it lands even sweeter light! The extra 2 1/2lb of fuel you are landing with makes a difference in flat calm conditions (don't know what you had yesterday)
I hope you get years of happiness from you Ultra Flash...Best Sports Jet available :-)

Dave

SR117

Guys how much smoke time are you getting with the wing tank.. I know you can adjust but roughly how many seconds or mins.

Is it better to run Smoke from the saddles...and if so would you have air trap---main--wing or airtrap-wing--main ( I saw an article on that earlier but cant find it...this thread is way long now. )

I have to replumb due to a leak and after seeing another one fly last weekend.. Im not sure what is best saddles or wing for smoke...I can change, have smoke in wing...but......

David you have the most experience with the different models. P140RX.. what would you do with the 4 tanks. ie smoke on wing or saddles?

Thanks in advance

Midas D.

SR117,

I'm getting about 1.5 min of Smoke out of an full wing tank. I'm using the power box pump.
It needs quite some flow to get decent Smoke so that's why it runs out so fast, going less flow wasn't worth it.

Running through the wing tank works flawless in my setup. (worked i must say cause this one is in the bin )

Must also add, not going to put smoke in the new one i'm building, although it's really cool and great and everything, i think it's to much of a hassle, weight and sticky business….. but that's just my 2 cents….

Cheers,

Ed

Dave Wilshere

If I were to run smoke, it would be from the saddles. Its why they were produced. If you use them for fuel you have a lot more plumbing to add drag into the system, plus they stay connected in the fuse, smoke fluid is even messier than fuel as it's all oil.
The stock set up works perfectly, always has. I'm going to build a new UF for myself and it will have a P-140 Rxi using the stock tank arrangement with an MAP Hi-Flow trap

Dave

SR117

Thanks. I'll convert to saddles for smoke.longer smoke time. Wing main then header then engine for fuel. Hopefully can get done this asap so ready for next Tarmac day in 3 weeks. I had to abort last maiden day we had due to leaking saddle bung/attachment. My stuff up.

quist

My Feedback: (198)

We are using the conformal tanks for fuel, But we are using two overflows in the main tank to reduce restriction. Before we did this we had a lot of swelling of the main tank while fueling. Both saddles drain even. I'm running a Titan SE and the other is running a 140RX. I wouldn't want any less fuel than I have with the saddles.
I also like the idea of having my fuel tanks always hooked up.

Midas D.

As for hopper/header Tank, is any one using the supplied hopper tank, and if yes does it work well??

spike5150

I just got the new JR Airspeed sensor. Any recommendations on where and how to mount the pitot tube on an Ultra Flash?

SR117

Hmmm.. what kind of flight time do you get on a 140RX with main and saddles? Apologies for all the questions. I just dont want to have to redo the tanks a 3rd time..
Those that have a 140 with main and wing what time do you get?
I want to get 6-8 mins if I can of flight time..,mixed speed...
Anything after that and I have some person telling me to land as Im hogging the sky
Midas I dont use the supplied one. Bought an aftermarket one from our local jet man...

DrV

My Feedback: (2)

I have a Merline 140x. I use Main and wing tank. I land after 6 min with mixed flying and still have 1L of fuel left in the main tank. The M140x is more efficient then the JC 140RXi. My friend has the 140Rxi and that's how I know the difference. He has to land 1 min earlier.

Dave Wilshere

I have flown 10+ P-140Rx powered UF and flying the way I do in the early thread videos, I I can fly 8.5-9 minutes, wing and fuse tank. Throttle use makes a big difference. Also there are still tanks out there without baffle holes in the top loop, this loses nearly 1/2 ltr of fuel unless you nose down/up the airframe during filling. Easy to check, fill till the fuse tank appears full, pick the model up nose down/tail down and see if a lot of air appears. There are photos of what happens a few pages back

Dave

SR117

Thanks Dave thats good info. Last question on the fuel. Are you going header to mains to wing then exit at wing or
header to wing to main exit fuse...
thanks in advance.

I found my real issue from last weekend. My wing bolts were a smidgen too long. I have a slight crack in the saddle tank. will re fibreglass and shorten bolts another 2mm.
Wish they shipped the correct bolts with the saddles...thought I had it right but I tightned the wing extra tight when I was reading for maiden..compared to my testing in the back yard which had no leaks..

Dave Wilshere

Stock. Header to fuse, fuse to wing and wing overflow. I always use the 6mm OD clear tube with 4.0mm i/d outside the tank and 1/8th bore tygon for the clunk lines. Our High flow felt clunks (the stock inner supplied by CARF needs drilling out if used) Now with Rxi turbines I'm using the MAP (Canada) Hi Flow hopper with big feed nipples. Looking at increasing tank tubing sizes for the Rxi turbines too.

Dave

SR117

Thanks Dave. exactly what I needed. much appreciated.