siddus74

Here we go again ... you should have talked him out of it Dave .... Have you given Raj a Motors and Rotors Loyality Card?

Scott.

Dave Wilshere

Scott

Can't keep a good guy down...he's mad for it!
Least you have a good grounding on these twins. Still need actual tank space sizes...The P-20SX with less than 20oz each isn't going to be much fun!

Dave

siddus74

Hes ordered 16oz tanks right? the p20 use only 90ml full throttle per minute, thats still a fair while on 16 once on each tank ... it really light and I will be surprised if its flown at full throttle.

Scott.

Bertiebones

There must be loads of space in there for whatever tank you want. I accept weight might be an issue but heck have enough fuel

siddus74

A p20 will use 90ml a minute in full power according to the JC website ...

1 Imperial fluid ounces = 28.4130742 millilitres according to Google
16 oz = 455ml approx (plus whats in the UAT) according to calc.exe

Is'nt that 5 minutes at full throttle? (Say 4 to be safe)

Have I got my calcs correct? You have me marginally concerned ...

Scott.

Nhalyn

Looking at the size/weight of this model + the size/power of this two P-20, I'm really sure it's overpowered and that you will never be full power outside of take-off !

This model is set for weight of 4.2 to 4.7Kg with twin 90mm EDF. With your two P20 you will have a ratio push/weight aroud 1 or better wich is waaaaay overpowered for a liner style plane ! This is not a speed model, nor an aerobatic model, and even less a 3D model ! This kind of plane is really aerodynamic effective and need really low power to flight and built up speed. It's more like a glider than a Rafale !

I've seen lot's of liner flying with turbine and the good push/weight ratio seem's to be 0.5 and it far more than the "real one's" have to take-off everyday.

Most of flight will be done with very low power on the stick to keep the speed in an acceptable value. So flight time will be waaaay longer than the 4 minuts full power.

My Jetcat P160SX is rated for 570mL per minut. As I have a 5.2L tank in my Futura 2.5m, I should have 9 minuts full throttle. But currently I have a timer on my transmitter set to 12 minuts and after landing it's common to have 1/3 tank quantity still in the plane... And I'm flying full time aerobatic like F3A routines, not only turn around the field...

RAJ

Looking good dude!!! This ones going to be a better model then the citation was as the airframe is much better quality The quality of the plane is same as the eflite habu good luck with the build!! Thanks to awar buddy dave wilshire again from (motors & rotors) for his help!! Dave il give u a ring Monday need to get the retracts and servos from you can't help it guys I'm an airline Nut lol

siddus74

These P20sx's it doesnt suggest a position to mount them (not glow plug for +-45 deg) are they at the correct angle ...

Quite and enjoyable afternoon ...

Scott.

siddus74

Raj,

As promised some pictures ...

Scott.

Meesh

My Feedback: (135)

Nice job Scott.

Can't wait to see the flight video.

Bob

RAJ

sweet work dude well done looks good i dunno about them eflite retracts whats the auw of the model at the mo is it lighter then the citation? was

Dave Wilshere

Going to be a rocket ship Raj....Looks lighter for sure

Dave

RAJ

Dave your right a rocket ship for sure!! Even the citation is a rocket ship on full power after the c of g was correctly balanced, hope it flys well I'm thinking of putting some fod guards on them turbines! What you think??

Dave Wilshere

Yep, hoover up all the grass with the turbine that far forward and the wheels throwing them crud!

Dw

RAJ

Lol hoover up the grass lol I like that one!! I defiantly don't want to Hoover up the grass il have to get 2 fod guards from you soon!! Any way Dave what's the best retracts I can go for on citation as them eflite 60-130 size retracts broke today on the citation Model is weighing about near 20lb wet

RAJ

Dude here's a video of vortex check it out!
Dave fired up the p20sx today in vortex it fired up sweet thanks for ur help this afternoon was kind! is the throttle response faster on the p20sx then the se? It seemed as if the throttle response was even better & faster then the se version also sounded louder is this right or is it just me! Scot when u fire them sx engines up let me knw what you think!

Video guys
http://www.youtube.com/watch?v=i5VMZ...e_gdata_player

Dave Wilshere

Raj

No problem...

Maybe fractionally yes. A few differences inside...

Dave

siddus74

Had a couple of starts with the new P20SX's jesus ... ultra consistant or what .... great engines for sure ..

Another project draws to a close ...

Scott.

Vid uploading now > > > http://youtu.be/kRV679M-TgQ

[youtube]http://www.youtube.com/watch?v=kRV679M-TgQ&feature=youtu.be[/youtube]

siddus74

Raj ... all done then ... glad your pleased with it - let me know how it flys.

Scott.

RAJ

Thanks dude u did a great job thanks for coming down aswel!
Yes wil defo fly it at some point and wil post videos and pics for you just like i did on citation!! Dude another one bites the dust lol next project wil be a challenge??...... thanks for the build

siddus74

Dude with all these projects, ill be looking at a new VT80 for my F104 Starfighter ... when are you getting the 146 to me?

Scott.

boomerman

That is looking very nice mate!!
well done scott!, look forward to meeting you when you come down our field mate!

RAJ

Cool dude the f104 wil be getting a new engine in ther hopefully more powerfull! More fun!
The 146 is expected to be delivered tommorow!! I can get it to you same day depending on your availability and time! Let me knw dude

Duncan

Where did you get the Vortex from? I've been on the lookout for one and can't find anywhere

Cheers
Duncan

RAJ

Hi Duncan I buyd the vortex a while back from a chap in Kent I flew it many times then upgraded the retracts to tam jets!! With trailing link legs! It now has a p20sx in ther plane is a good flyer flys like the Ă©lan but a mini version of it!! You can get one from nitro planes in us! Or best to put an wanted add on the classifieds! I'm sure thers many of them around when I buyd mine it was not in the best state however Scott sorted it all out for me and the plane has just been flying perfectly since then