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

C-ARF Ultra Flash build Thread + Video

Old 04-21-2013, 12:04 PM
  #2826
izzy
 
Join Date: Apr 2003
Location: REHOVOT, ISRAEL
Posts: 380
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Smoke :
I set up the prowerbox pump with diesel as smoke fluid , and got to test the smoke todayfor the first time on the ground only
when at either full or half throttle , i got puffs of smoke, but not consistent smoke, and it really was not that thick
anyone know why it puffs on and off -also not sure of the smoke was that thick when it did come out

using stainless pipe from Motors and rotors, so the shape of the exit should be good
right now not using a graph- just direct switch for on off (-100 off / 0 (would be half power pump and +100 for full pump)
how close or far am i supposed to have the tip from the cone of the turbine (right now it is 2.5cm from the exit of the turbine - centered - and maybe a few millimeters into the thurst tube(after the carbon bell))

thx
izzy
izzy is offline  
Reply With Quote
Old 04-21-2013, 12:15 PM
  #2827
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Different brain-thumb thing...wouldn't like to link Birdy with Ali as two of a kind! I still hated how it worked on Steve Johnson's UF with CROW....hey if it works for your technique

Dave Wilshere is offline  
Reply With Quote
Old 04-21-2013, 12:18 PM
  #2828
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video


Quote:
ORIGINAL: izzy

Smoke :
I set up the prowerbox pump with diesel as smoke fluid , and got to test the smoke todayfor the first time on the ground only
when at either full or half throttle , i got puffs of smoke, but not consistent smoke, and it really was not that thick
anyone know why it puffs on and off -also not sure of the smoke was that thick when it did come out

using stainless pipe from Motors and rotors, so the shape of the exit should be good
right now not using a graph- just direct switch for on off (-100 off / 0 (would be half power pump and +100 for full pump)
how close or far am i supposed to have the tip from the cone of the turbine (right now it is 2.5cm from the exit of the turbine - centered - and maybe a few millimeters into the thurst tube(after the carbon bell))

thx
izzy
Izzy

Diesel is never that good. Your set up sounds OK, you could move the smoke tube exit back so its a bit further behind. 4cm

Dave

Dave Wilshere is offline  
Reply With Quote
Old 04-21-2013, 12:25 PM
  #2829
Andrew Bird
 
Andrew Bird's Avatar
 
Join Date: Jun 2006
Location: Henley on Thames, UNITED KINGDOM
Posts: 708
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Ali would be proud to know he's got a lot in common with me! A fine head of hair, mighty sense of humour and classic good looks
Andrew Bird is offline  
Reply With Quote
Old 04-21-2013, 12:27 PM
  #2830
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video


Quote:
ORIGINAL: Andrew Bird

Ali would be proud to know he's got a lot in common with me! A fine head of hair, mighty sense of humour and classic good looks
Ginger!? Nah...
Dave Wilshere is offline  
Reply With Quote
Old 04-21-2013, 12:31 PM
  #2831
Andrew Bird
 
Andrew Bird's Avatar
 
Join Date: Jun 2006
Location: Henley on Thames, UNITED KINGDOM
Posts: 708
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

He wishes he was a ginger! We clearly are the master race
Andrew Bird is offline  
Reply With Quote
Old 04-21-2013, 12:36 PM
  #2832
Rob Howarth
 
Join Date: May 2005
Location: Wooburn Green, UNITED KINGDOM
Posts: 231
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Children,

Given this thread has only just become straight after a Hogwarts moment, shall we take this 'off stage'? I've already had a 'stoking' email from the chief gimper and nudger with his big stirring spoon, AKA.......
Rob Howarth is offline  
Reply With Quote
Old 04-23-2013, 05:58 AM
  #2833
Gixxy
 
Join Date: Jan 2008
Location: Clermont, FL
Posts: 135
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Curious, has anyone had any experience with the electric gear/brake package combo for the ultra flash available from dreamworks ? I'm always up for giving something new a try and I really like the idea of electric brakes and retracts.

http://dreamworksrc.com/catalog/comp...bo-p-3614.html

My UF arrives today and the turbine is already waiting for her Just need to order a few minor things. Any input on the gear would be appreciated. Thanks !

-Nick
Gixxy is offline  
Reply With Quote
Old 04-23-2013, 07:16 AM
  #2834
SMBJets
 
Join Date: Feb 2010
Location: PerthWestern Australia, AUSTRALIA
Posts: 51
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Hi Nick,

I've ordered the electric gear/brake combo from Dreamworks and the package arrived today.
upon initial inspection the units appear well built, I plan to install them tomorrow so will come back with a report once they are installed and working.

At this stage I'm planning to do the maiden flight this weekend.
SMBJets is offline  
Reply With Quote
Old 04-23-2013, 07:24 AM
  #2835
Gixxy
 
Join Date: Jan 2008
Location: Clermont, FL
Posts: 135
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Sounds great !, I'll be traveling for the next few weeks so I'm not in a immediate rush to buy.

Can't wait to hear your review/thoughts on them
Gixxy is offline  
Reply With Quote
Old 04-23-2013, 07:51 AM
  #2836
bobg
 
Join Date: Mar 2010
Location: Northern Ireland, UNITED KINGDOM
Posts: 206
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

These look good ,wonder how they would stand the test of the Irish weather ,look forward to your findings ,
bobg is offline  
Reply With Quote
Old 04-23-2013, 08:32 AM
  #2837
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Double post!
Dave Wilshere is offline  
Reply With Quote
Old 04-23-2013, 08:35 AM
  #2838
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Since I have three Ultra Flashes to do, I thought I'd share my canopy fixing method. Everyone is different, but this one works for me.

Out of the box the canopy frame has a joint tape, this needs Dremelling down, I use a sanding drum and a tapered stone for the front. I also go around the frame with the drum sander and remove all the lumps and un-even thickness.
Then I cut the glass to size, leaving only 5mm at the front and 12-15mm at the rear.
I then fit the frame with the front rod and pull back and tape the rear to get an even gap.

Thread the glass in by squeezing it clear of the frame, so as not to scratch and pop it into place. Lift it and check it sits with no gap front and back. Move it forward slighly and place a dob of ZAP 20 centre of the glass front and back. Slide the glass back and gently insert the front before lifting the rear-hold it in position and kick with an O type kicker (weaker version-NOT std Zap kicker its too strong and will fog the glass)

Once dry you can remove the frame as the gap will stay and with finger and thumb inside, around the frame loop position roll/push the glass up until the is no gap on the hoop. Squeezing one side hard put some ZAP 20 on the inside glass edge-frame joint and kick. Do the other side and there should be no hoop gap.
Put the frame back on and check you have not twisted the frame/canopy and if all good remove again and tack inside every 2" alternate sides, each time placing it back on the model to check for twists.
Once complete I run around the inside with ZAP 560 canopy glue to seal down the glass....done!

Dw
Dave Wilshere is offline  
Reply With Quote
Old 04-23-2013, 08:40 AM
  #2839
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Last couple
Attached Thumbnails
Click image for larger version

Name:	Tq48771.jpg
Views:	120
Size:	52.6 KB
ID:	1875498   Click image for larger version

Name:	Lg17213.jpg
Views:	140
Size:	81.1 KB
ID:	1875499  
Dave Wilshere is offline  
Reply With Quote
Old 04-24-2013, 10:31 PM
  #2840
ons_pk
 
ons_pk's Avatar
 
Join Date: Feb 2004
Location: London, UNITED KINGDOM
Posts: 77
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video



Great post Dave,

Just to check, I am assuming the O type kicker is the Foam Safe Kicker.?
ons_pk is offline  
Reply With Quote
Old 04-24-2013, 10:44 PM
  #2841
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Yes, its weaker and won't fog the canopy. You must use ZAP 20 too, anything else too thin.
Did the second of three I have to do yesterday, I ran a black marker on the frame cut edge to get rid of the white line before gluing the screen in.

Dw

[quote]ORIGINAL: ons_pk



Great post Dave,

Just to check, I am assuming the O type kicker is the Foam Safe Kicker.?

[/quote
Attached Thumbnails
Click image for larger version

Name:	Vt58351.jpg
Views:	70
Size:	66.0 KB
ID:	1876047  
Dave Wilshere is offline  
Reply With Quote
Old 04-25-2013, 10:44 AM
  #2842
tucson
 
Join Date: Dec 2001
Location: tucson, AZ
Posts: 776
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Finally did my weight and balance on my UF.

Balance point between 225 and 230mm.

Weight with smoke tanks, pump, and battery for the smoke pump, 22 lbs 12 oz's. Not to bad.

All that is left is to prime the fuel line and set the KT 140 up with the transmitter.

Hopefully next week to finally get it in the air.

I love the paint scheme on mine.

I am undecided as to darken the canopy. I like they way they look darkened but the sun here in AZ gets pretty hot here in the summer.

Stan
Attached Thumbnails
Click image for larger version

Name:	Sp45453.jpg
Views:	57
Size:	164.2 KB
ID:	1876145   Click image for larger version

Name:	Dy78490.jpg
Views:	48
Size:	144.7 KB
ID:	1876146  
tucson is offline  
Reply With Quote
Old 04-25-2013, 11:22 AM
  #2843
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Stan

Looks good, enjoy.

Dave
Dave Wilshere is offline  
Reply With Quote
Old 04-25-2013, 01:19 PM
  #2844
reznor
 
reznor's Avatar
 
Join Date: Nov 2002
Location: Kirkland, WA
Posts: 129
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Finally got my 2nd day of flying the UF. I live in Washington and it rains a lot here. Great airplane. Built per instructions. P140RX. Saddle tanks, wing tank is smoke. Using a PB smoke pump with a single Tams stick (the new one with the little tab on the end). Tons of smoke with Super Dry and is light on fluid use. Photos below - some aren't so great, but I work with what I'm given!

Thanks for the help with the RX issues Dave.

Bill B.
Attached Thumbnails
Click image for larger version

Name:	Mk26934.jpg
Views:	67
Size:	148.8 KB
ID:	1876167   Click image for larger version

Name:	Up47962.jpg
Views:	65
Size:	153.9 KB
ID:	1876168   Click image for larger version

Name:	Wc77185.jpg
Views:	74
Size:	170.4 KB
ID:	1876169   Click image for larger version

Name:	Wp41234.jpg
Views:	69
Size:	156.5 KB
ID:	1876170   Click image for larger version

Name:	Rd42209.jpg
Views:	77
Size:	143.5 KB
ID:	1876171  

Click image for larger version

Name:	Uk77583.jpg
Views:	64
Size:	180.8 KB
ID:	1876172   Click image for larger version

Name:	Oq20969.jpg
Views:	67
Size:	38.3 KB
ID:	1876173   Click image for larger version

Name:	Qp52176.jpg
Views:	55
Size:	106.8 KB
ID:	1876174   Click image for larger version

Name:	Lk84755.jpg
Views:	58
Size:	260.3 KB
ID:	1876175   Click image for larger version

Name:	Pb24713.jpg
Views:	47
Size:	172.2 KB
ID:	1876176  

Click image for larger version

Name:	Db85658.jpg
Views:	62
Size:	83.9 KB
ID:	1876177   Click image for larger version

Name:	Yt62081.jpg
Views:	68
Size:	68.0 KB
ID:	1876178  
reznor is offline  
Reply With Quote
Old 04-25-2013, 01:41 PM
  #2845
ons_pk
 
ons_pk's Avatar
 
Join Date: Feb 2004
Location: London, UNITED KINGDOM
Posts: 77
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Bill

Looking great. Nice field you got there.

Still working on mine.


ons_pk is offline  
Reply With Quote
Old 04-25-2013, 01:50 PM
  #2846
reznor
 
reznor's Avatar
 
Join Date: Nov 2002
Location: Kirkland, WA
Posts: 129
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video


Quote:
ORIGINAL: ons_pk

Bill

Looking great. Nice field you got there.

Still working on mine. [img][/img]


Thanks. Yeah it's a great field, we're very fortunate! Kind of small though. Main runway is only 200' x 5,000'.

Bill B.
reznor is offline  
Reply With Quote
Old 04-25-2013, 02:06 PM
  #2847
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video


Quote:
ORIGINAL: reznor

Finally got my 2nd day of flying the UF. I live in Washington and it rains a lot here. Great airplane. Built per instructions. P140RX. Saddle tanks, wing tank is smoke. Using a PB smoke pump with a single Tams stick (the new one with the little tab on the end). Tons of smoke with Super Dry and is light on fluid use. Photos below - some aren't so great, but I work with what I'm given!

Thanks for the help with the RX issues Dave.

Bill B.
Bill

Looking good in the bright sky.
No problem, pleasure to help.

Dave
Dave Wilshere is offline  
Reply With Quote
Old 04-25-2013, 07:11 PM
  #2848
Springbok Flyer
 
Springbok Flyer's Avatar
 
Join Date: Jun 2006
Location: Gold Coast, Queensland, AUSTRALIA
Posts: 991
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Dave,

Can you confirm that you are using the CARF setup as per the UF update

http://www.carf-models.com/public_ca..._update_v2.pdf

Or have you found better settings?

Thanks,

Jan
Springbok Flyer is offline  
Reply With Quote
Old 04-25-2013, 10:40 PM
  #2849
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 9,447
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Quote:
ORIGINAL: Springbok Flyer

Dave,

Can you confirm that you are using the CARF setup as per the UF update

http://www.carf-models.com/public_ca..._update_v2.pdf

Or have you found better settings?

Thanks,

Jan

Jan

I'm running exactly that set up. I have not changed the settings since 2010 when I wrote that section. For me and many others it works perfectly, some people like Ali prefer CROW and less flap. I have flown a few UF models set up that way and I found although it changed the sit to a nose high position, so scrubbing speed that way, the 'drop off' was more sudden just before touch down.
So it really depends on you landing style. The UF will touch down with very little ground speed.
I would say with the stock set up its important to set the flap-elevator compensation so the aeroplane stays level at full flap. I watched someone bounce their UF several times last week because the nose was slightly down and I don't think they were holding off enough. The UF has plenty of elevator authority, its not like a Bandit where you are hauling on the elevator on touchdown.

Can't say there is a right or wrong. Movement wise those settings are quite responsive, so if you like a softer response, reduce them down a bit-Ailerons especially.

Regards

Dave

If you look at Bill's landing shots above, looks perfect touchdown angles and stock set-up.
Dave Wilshere is offline  
Reply With Quote
Old 04-25-2013, 11:45 PM
  #2850
Mäksä
 
Mäksä's Avatar
 
Join Date: Mar 2008
Location: Tampere, FINLAND
Posts: 62
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: C-ARF Ultra Flash build Thread + Video

Does anyone have information. UF + I gyro. what would be suitable airspeed factor value? or something that would be good to know ..

Petri
Mäksä is offline  
Reply With Quote


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 08:38 AM.