RC Jets Discuss RC jets in this forum plus rc turbines and ducted fan power systems

JET LEGEND VIPER BUILD THREAD

Reply
Old 08-26-2012, 05:21 AM
  #151
keweiliang
 
keweiliang's Avatar
 
Join Date: Jul 2011
Location: zhanjiang, CHINA
Posts: 134
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Hi Marcelo,
Thanks for your watch.The P38 made by HongKong Fun-KeyAeroplane Models.

William


keweiliang is offline  
Reply With Quote
Old 09-01-2012, 12:08 AM
  #152
Jeremy_D
 
Jeremy_D's Avatar
 
Join Date: Feb 2005
Location: Central Coast, AUSTRALIA
Posts: 1,050
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Well Mine has flown and it was great!!

First flight was a little hairy, I needed quite a lot of left aileron trim and then when we tested the 1st stage flaps it nosed up and rolled left hard so the first landing was with no flap and was fine. Once we got that sorted the next flight was much better and we were able to use the flap, ended up going straight to landing flap for the final circuit and it landed very nicely.

Overall it is a great little jet and the P80 pushed it along nicely. I'm looking forward to putting in more flights on it at Temora Jets in a few weeks.

I've got some video of my second flight but my camera man was having issues seeing it so it is not that great but gets the take off and landing. A Big thanks to Phil Celima for his help today

http://www.youtube.com/watch?v=fYxts6fzSAk

Cheers

Jeremy
Attached Thumbnails
Click image for larger version

Name:	Vt56728.jpg
Views:	160
Size:	177.3 KB
ID:	1797157  
Jeremy_D is online now  
Reply With Quote
Old 09-01-2012, 12:23 AM
  #153
Mark Vandervelden
 
Mark Vandervelden's Avatar
 
Join Date: Jul 2012
Location: Bournmouth UNITED KINGDOM
Posts: 478
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Congratulations Jeremy on your first flights
As you have found out shes very stable at full flap, You can force your way in without picking up speed andget a very nice flare with no tendency to balloon.
I remember mine too did roll a little but only with half flap on the first flights and had to be trimmed with a small bit of mixing
Have many more and enjoy you up coming Jet Meet
Regards Mark
Mark Vandervelden is offline  
Reply With Quote
Old 09-01-2012, 12:28 AM
  #154
Boomerang1
 
Boomerang1's Avatar
 
Join Date: Jun 2005
Location: Sydney, AUSTRALIA
Posts: 2,832
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Congrats Jeremy, look forward to seeing it at Temora.

Thank goodness your cameraman flys better than he can video!

John.
Boomerang1 is offline  
Reply With Quote
Old 09-01-2012, 12:29 AM
  #155
Jeremy_D
 
Jeremy_D's Avatar
 
Join Date: Feb 2005
Location: Central Coast, AUSTRALIA
Posts: 1,050
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Quote:
ORIGINAL: Boomerang1

Congrats Jeremy, look forward to seeing it at Temora.

Thank goodness your cameraman flys better than he can video!

John.
Hahaha - you should have heard the rest of his commentary for the other 8 minutes...typical Sparks...can't see the %$#@ plane, where is it, sigh...etc....could make a pretty crude bloopers reel!! lol
Jeremy_D is online now  
Reply With Quote
Old 09-01-2012, 12:33 AM
  #156
Ian Prentice
Thread Starter
 
Ian Prentice's Avatar
 
Join Date: Nov 2006
Location: leeds, , UNITED KINGDOM
Posts: 121
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Nice one Jeremy ! You went for the beat scheme! Good to see they didn't put the advertising on yours :-) I have the same issue! rolls over to the left on half flap ! Off out with it today to try and put a mix on it !
Ian Prentice is offline  
Reply With Quote
Old 09-01-2012, 12:34 AM
  #157
Jeremy_D
 
Jeremy_D's Avatar
 
Join Date: Feb 2005
Location: Central Coast, AUSTRALIA
Posts: 1,050
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Quote:
ORIGINAL: modelmancan

Congratulations Jeremy on your first flights
As you have found out shes very stable at full flap, You can force your way in without picking up speed and get a very nice flare with no tendency to balloon.
I remember mine too did roll a little but only with half flap on the first flights and had to be trimmed with a small bit of mixing
Have many more and enjoy you up coming Jet Meet
Regards Mark
Thanks Mark,

Good to hear someone else had a similar issue as well. We reduced the flap travel on the right wing slightly and I think it may have been just out. In the video take off was with no flap and it got off just fine. I'm really looking forward to getting to know it. Thanks for the help as well on here and via email.

Cheers

Jeremy

P.S my CG was 35mm behind the stock cg as per everyone else and is a good place to start
Jeremy_D is online now  
Reply With Quote
Old 09-01-2012, 12:36 AM
  #158
Jeremy_D
 
Jeremy_D's Avatar
 
Join Date: Feb 2005
Location: Central Coast, AUSTRALIA
Posts: 1,050
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Quote:
ORIGINAL: Ian Prentice

Nice one Jeremy ! You went for the beat scheme! Good to see they didn't put the advertising on yours :-) I have the same issue! rolls over to the left on half flap ! Off out with it today to try and put a mix on it !
Try reducing the 1st stage throw on the right wing, I did this and the roll to the left was minimal after that, I think I'll just use full flap only and no flap for take off. Full flap had no flap change at all so the take off flap roll seems to be a common thing issue.

My left trim is 19 clicks left or about 2mm up (futaba 12fg), I think this is partially due to the slightly warped right elevator, but trimmed out it is fine.

I've put more photos on my Facebook page of the build and the day

http://www.facebook.com/aussiejets

Cheers

Jeremy
Jeremy_D is online now  
Reply With Quote
Old 09-01-2012, 02:44 AM
  #159
kasi122
 
Join Date: Apr 2007
Location: Alkoven, AUSTRIA
Posts: 78
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Hi,

I also had the maidnflight of my "vodafone" viper on wednesday. Everything went perfect.
Mine didnt roll to the left with take off flap setting. Flies great!!. My cg is 30mm behind the factory setting, but i will install a smoke next to the
turbine, so i will get the 35mm. A very nice jet for a good price!! i have a 9kg turbine in mine (1000g) and the weight is 10kg empty. So for takeoff around 12kg

Andy
kasi122 is offline  
Reply With Quote
Old 09-01-2012, 03:48 AM
  #160
keweiliang
 
keweiliang's Avatar
 
Join Date: Jul 2011
Location: zhanjiang, CHINA
Posts: 134
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Congratulations Jeremy!
Nice video.Landing is very great.
keweiliang is offline  
Reply With Quote
Old 09-01-2012, 09:35 PM
  #161
Jeremy_D
 
Jeremy_D's Avatar
 
Join Date: Feb 2005
Location: Central Coast, AUSTRALIA
Posts: 1,050
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD


Quote:
ORIGINAL: keweiliang

Congratulations Jeremy!
Nice video.Landing is very great.[img][/img][img][/img]
Thanks, It is much nicer to land with flaps than without!
Jeremy_D is online now  
Reply With Quote
Old 09-10-2012, 05:31 AM
  #162
keweiliang
 
keweiliang's Avatar
 
Join Date: Jul 2011
Location: zhanjiang, CHINA
Posts: 134
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Hi guys,
September 8,2012.Continue to share my JL viper jet flight video.This time we try to formation flight with smoke.

video1: http://www.tudou.com/programs/view/a2tAOXQXBvk/
video2: http://www.tudou.com/programs/view/URnOxfG6HHM/

Regards
William
Attached Thumbnails
Click image for larger version

Name:	Ig12878.jpg
Views:	143
Size:	63.8 KB
ID:	1799760   Click image for larger version

Name:	Pk29880.jpg
Views:	123
Size:	62.8 KB
ID:	1799761   Click image for larger version

Name:	Jo30532.jpg
Views:	140
Size:	65.4 KB
ID:	1799762  
keweiliang is offline  
Reply With Quote
Old 09-10-2012, 06:21 PM
  #163
mikedenilin
 
Join Date: Jan 2004
Location: Irvine, CA
Posts: 1,686
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Hi William

Nice field! Where is it? I want to go there next time.

Mike
mikedenilin is offline  
Reply With Quote
Old 09-10-2012, 07:45 PM
  #164
keweiliang
 
keweiliang's Avatar
 
Join Date: Jul 2011
Location: zhanjiang, CHINA
Posts: 134
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Hi Mike,
Zhuhai heliport,Zhuhai city, guangdong province, China

William
keweiliang is offline  
Reply With Quote
Old 09-16-2012, 04:11 PM
  #165
mtnitro
 
Join Date: Feb 2002
Location: beachpark, IL
Posts: 27
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

HI William,
I got a JL viper jet coming in about 3 weeks, I was wondering if the jet cat p140rx would fit in it?
I thought with a smoke system, it could use more power then the p80 or p100, I can turn it down
a little. What do you think? I enjoy your flight video's.
Thanks, Mike
mtnitro is offline  
Reply With Quote
Old 09-17-2012, 10:16 AM
  #166
ceffi
 
ceffi's Avatar
 
Join Date: Dec 2003
Location: 34590 WabernEurope, GERMANY
Posts: 239
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Hi Mike,

don't do that. do not use a P140.
To heavy, to much power.
We flew our at JetPower this weekend.
As I wrote, I use a Merlin 100, cuted out the ducts, removed the tanks more to the rear, the CG is by 3,5cm behind the original and the t/o weight is with 2,4l kero and 0,75 somke 12,34kg.
With htis motor the Viper goes very fast, we had only by one straight and level flight the power of full throttle.
You can fly loops as big as you want.
But that's just only my opinion and the experience of nearly 30 flights with the little Viper.

http://images.rcuniverse.com/forum/u...71/Sn41902.jpg

Christian
Final-Modellbau.de
ceffi is offline  
Reply With Quote
Old 09-18-2012, 03:45 AM
  #167
jeff sewell
 
Join Date: Jul 2005
Location: hull, UNITED KINGDOM
Posts: 702
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Myadvice would be to turn the power down or just be careful on the throttle! The first Vipers here in the UK flew on the JL T12 which produces about 28 pounds.

Jeff
jeff sewell is offline  
Reply With Quote
Old 09-18-2012, 05:15 AM
  #168
keweiliang
 
keweiliang's Avatar
 
Join Date: Jul 2011
Location: zhanjiang, CHINA
Posts: 134
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Hi Mike,
I bought the"Turn Key" version,include JL T12(120N) turbine,3L fuel tank and 2.4L smoke tank,HV servos etc.
As far as i know T12 turbine's diameter and weight is the same with the Jetcat p140rx,so it can fit in your viper
jet very well.My little viper had more than 100 flights.I like flight with strong power.
If you do decide to choose p140rx.my opinion same with Jeff, turnthe powerdown a little or be very careful on the throttle!
Maybe help you!Enjoy your flights.

Regards
William
keweiliang is offline  
Reply With Quote
Old 09-19-2012, 07:20 AM
  #169
steve2972
 
Join Date: Feb 2005
Location: southamwarwickshire, UNITED KINGDOM
Posts: 442
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

After visiting Jet Power over the weekend and seeing this kit in the flesh,its on the list,just awaiting confirmation on when the e-retract version will be available.Jet Munts also have a new turbine being released,M100X which is an updated 100 with internal valves/sensors,same size/weight as the VT80 which I was thinking of using.After seeing the Jet fly on the Merlin 100 at the show,this would be my engine of choice.
steve2972 is offline  
Reply With Quote
Old 09-23-2012, 03:20 PM
  #170
Jeremy_D
 
Jeremy_D's Avatar
 
Join Date: Feb 2005
Location: Central Coast, AUSTRALIA
Posts: 1,050
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Here is some more video of my Viper over the weekend. My last landing of the meet was the best, really slowed it down as we had a strong head wind.

It is a great little jet to fly and really hums as it cuts through the air. I'm contemplating adding some white to the the silver as it really reflects in the sun.

http://www.youtube.com/watch?v=BcEZb88QolU
Jeremy_D is online now  
Reply With Quote
Old 09-23-2012, 04:44 PM
  #171
GRVW
 
Join Date: Mar 2009
Location: Canberra, AUSTRALIA
Posts: 26
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Does anyone have a view on whether a P70 (17.5lb) is just too borderline small for this airframe? That's all I've got.
I saw Jeremy's at Temora and it flew really well with the P80SE.
GRVW is online now  
Reply With Quote
Old 09-24-2012, 12:07 AM
  #172
madmodelman
 
madmodelman's Avatar
 
Join Date: Oct 2006
Location: Corby, Northants, UNITED KINGDOM
Posts: 2,169
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

I use an 80SE also, off tarmac.
On grass or rough a 70 would struggle but on tarmac it would fly, verticals would be a struggle and take offs long though.
In short, it would fly but not be very enjoyable, it's a quick machine even on an 80.
Gary.
madmodelman is offline  
Reply With Quote
Old 09-24-2012, 12:49 PM
  #173
GRVW
 
Join Date: Mar 2009
Location: Canberra, AUSTRALIA
Posts: 26
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

Thanks. A P70 looks to be too marginal then.
GRVW is online now  
Reply With Quote
Old 09-24-2012, 01:30 PM
  #174
madmodelman
 
madmodelman's Avatar
 
Join Date: Oct 2006
Location: Corby, Northants, UNITED KINGDOM
Posts: 2,169
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD

I think so to be honest, the airframes just a bit too big.
madmodelman is offline  
Reply With Quote
Old 10-09-2012, 03:46 AM
  #175
keweiliang
 
keweiliang's Avatar
 
Join Date: Jul 2011
Location: zhanjiang, CHINA
Posts: 134
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: JET LEGEND VIPER BUILD THREAD



Hi guys,
Are you still flight your little JL viper jet?
In the Mid-Autumn festival and National Day holiday,i have gone to Beijing and then to Zhuhai City.
For me,rc jetsflying more interesting than tourism !
This time,I try to fly the really of "touch and go",below the video share.

http://www.tudou.com/programs/view/YZnV4vQRCPI/

Regards
William

Attached Thumbnails
Click image for larger version

Name:	Vt58476.jpg
Views:	60
Size:	248.0 KB
ID:	1809627   Click image for larger version

Name:	Fk16089.jpg
Views:	70
Size:	222.6 KB
ID:	1809628   Click image for larger version

Name:	Lf94156.jpg
Views:	81
Size:	136.2 KB
ID:	1809629   Click image for larger version

Name:	Cn80151.jpg
Views:	79
Size:	93.7 KB
ID:	1809630   Click image for larger version

Name:	Zx70214.jpg
Views:	58
Size:	292.8 KB
ID:	1809631  
keweiliang is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 11:43 AM.