Go Back  RCU Forums > RC Airplanes > RC Jets
Reload this Page >

C-ARF Ultra Flash build Thread + Video

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

C-ARF Ultra Flash build Thread + Video

Thread Tools
 
Search this Thread
 
Old 12-29-2013, 12:08 PM
  #3651  
Midas D.
 
Join Date: Apr 2013
Location: holland, NETHERLANDS
Posts: 474
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Bosmodelair
Hye Edwin,

I was getting in to the UF thread for orientation and saw your posts over here.
And by lack of a thread on a Dutch forum I will follow it here

You have spend your X-mas days good I see, little sad about the tank, something to keep in mind.

Grt,
Berto.
Hi Berto,

The dutch forum is only for rocket scientists as it come's to adding pictures…….
Old 12-29-2013, 12:23 PM
  #3652  
RemoteJets
 
Join Date: May 2006
Location: Zeewolde, NETHERLANDS
Posts: 607
Received 32 Likes on 20 Posts
Default

Hehe, that's true that's why I use my own webspace for the pic's. That's a lot easier.

Mmmh, sound like the quality overall is not 100%.
That's a little too bad. If I take a look at my C&C L-39 it all fits great and I didn't need to modify anything.

Mhhh, will see what to do.
Looking at the vids and reading the internet the UF flies awesome.

Will keep on following this thread.

Grt,
Berto.
Old 12-29-2013, 12:24 PM
  #3653  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 13,097
Received 733 Likes on 529 Posts
Default

Not fair for me to moment when I have not seen things...but a Friend bought a Krill Extra 330...his comments were, paint. Terrible. Worse Fuselage flexed a lot. Worse still incidences were different...on every surface. CARF don't have two of those issues and others are subjective, and looking at my latest two models improved. Will see long term with real percentages.
Old 12-29-2013, 12:55 PM
  #3654  
tellmic
Junior Member
 
Join Date: Sep 2013
Location: Netherlands
Posts: 23
Likes: 0
Received 0 Likes on 0 Posts
Default

Here are pictures of the 8mm offset of the gear support.
Attached Thumbnails Click image for larger version

Name:	IMG_0578.jpg
Views:	452
Size:	2.14 MB
ID:	1952317   Click image for larger version

Name:	IMG_0577.jpg
Views:	384
Size:	1.94 MB
ID:	1952318  
Old 12-29-2013, 12:57 PM
  #3655  
husafreak
My Feedback: (3)
 
husafreak's Avatar
 
Join Date: Dec 2004
Location: Livermore, CA
Posts: 1,202
Received 50 Likes on 42 Posts
Default

Thanks for the replies, love the vacuum cleaner idea! then flush with alcohol. I learned not to flush with water already, took a week to dry... Sounds like cloth patches are not even necessary to fix the pinholes. Easy enough.
If you are considering a UF well, just do it. There were at least 15 of them at BITW, a very good indication of how popular they are.
I have heard it is a constant battle to keep the overseas manufacturers of these planes (hows that for PC?) doing quality work, up to spec. But all those trips to China cost money. I think the cost of CARF or Krill models should cover QC or I would fault the companies, not the factories. Maybe the mass acceptance of Hobby King quality is working against those of us still spending a lot on our airplanes?
Old 12-29-2013, 01:06 PM
  #3656  
Midas D.
 
Join Date: Apr 2013
Location: holland, NETHERLANDS
Posts: 474
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Dave Wilshere
Not fair for me to moment when I have not seen things...but a Friend bought a Krill Extra 330...his comments were, paint. Terrible. Worse Fuselage flexed a lot. Worse still incidences were different...on every surface. CARF don't have two of those issues and others are subjective, and looking at my latest two models improved. Will see long term with real percentages.
Well Maybe i then was unlucky with 2 planes from an bad batch?? Who can tell…….
It's not that i want to start an big thing about this but it's just my findings on both plane's…..
Maybe my expectations from such an big "top of the line" manufacturer where to high…..
First out of the box they really are the best until i start building just ran in to quite a few things that are trails of mass/high-speed production in my opinion….

But if you want me to give you fact's and get the subjective bit out of the way,
I can start making pictures of all the "things" i ran in to so far and start posting them here….
Just let me know, no problem.

Once again just my 2 cents, and what's wrong with being critical??
It's not that we are talking peanut $$ here for "toy planes"or am i missing something?

Last edited by Midas D.; 12-29-2013 at 01:26 PM.
Old 12-29-2013, 05:33 PM
  #3657  
SR117
 
Join Date: Apr 2013
Location: Melbourne, AUSTRALIA
Posts: 98
Likes: 0
Received 0 Likes on 0 Posts
Default

Hi Dave

dont want to start a DA versus 3W or Jetcat versus Kingtech forum here..but...

Have 2 Krills. Both Yak 55M 37% One 5+ years old now... Customer service with them has been excellent. ..
Great IMAC aircraft...they have won many comps....but being light there is a compromise of course...you need to treat them gentle.
Like a 3D universe Euro.

If you do they will last 5 years like my did.

I had the faulty spar they talked about on the Yaks in the early days... they found out where I was..sent me the fix pieces...and advised me by email immediately they found out about it. They recommended I didnt fly and sent the fix out immediately...
My orgininal Krill has 600+ flights on it now...so i cant complain. Especially when to set up it was 10K plus Aus.

Im hoping my Euro and UF will prove to be just as good....Im sure they will be as Comp Arf seem good as well.
My friends that I flew against that had Comp arf always said they were good. They had cracks, paint issues, etc. I even saw a wing delaminate and blow off.. Our local IMAC Comp arf agent here looked after them and they are happy. Even the one that delaminated...

Its one thing to have an issue. Its another if the supplier steps up and does something about it. Krill did and as far as Im aware the local guy for Comp arf does as well. Both are great.
I know the Jet Comp Arf guy here has been great as well... So Im happy so far..

I heavy landed the other day on the euro and no issues...very solid...and Im very happy.

Time will tell. Both brands have their issues and plusses.....

Hope this does not affend..
Old 12-31-2013, 05:30 PM
  #3658  
spike5150
 
Join Date: Jan 2007
Location: Castle Rock, CO
Posts: 267
Likes: 0
Received 0 Likes on 0 Posts
Default

Here are some pics of my (limited) progress. If anyone sees any issues please let me know. Also included a pic of the nice holes I drilled through the top of the fuse when drilling the mount holes for the upper bypass attachment. Drill bit caught while trying to enlarge the hole to 4mm - DOH!! Touch up paint ordered...

Attached Thumbnails Click image for larger version

Name:	DSC01646.JPG
Views:	509
Size:	3.97 MB
ID:	1952994   Click image for larger version

Name:	DSC01647.JPG
Views:	449
Size:	3.64 MB
ID:	1952995   Click image for larger version

Name:	DSC01648.JPG
Views:	448
Size:	4.41 MB
ID:	1952996   Click image for larger version

Name:	DSC01649.JPG
Views:	437
Size:	3.83 MB
ID:	1952997   Click image for larger version

Name:	DSC01650.JPG
Views:	398
Size:	3.19 MB
ID:	1952998  
Old 01-01-2014, 02:48 AM
  #3659  
Midas D.
 
Join Date: Apr 2013
Location: holland, NETHERLANDS
Posts: 474
Likes: 0
Received 0 Likes on 0 Posts
Default

Welcome all to 2014,

Wish every one on here all the best for the upcoming Year!!

Although it's an bit of an messy start it will be full of new exciting challenges
Attached Thumbnails Click image for larger version

Name:	IMG_2835.JPG
Views:	552
Size:	2.45 MB
ID:	1953066  
Old 01-01-2014, 03:35 AM
  #3660  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 13,097
Received 733 Likes on 529 Posts
Default

Originally Posted by Midas D.
Welcome all to 2014,

Wish every one on here all the best for the upcoming Year!!

Although it's an bit of an messy start it will be full of new exciting challenges
We have people who fly there models with installs like that! :-)

Happy New Ultra Flash year!
Old 01-01-2014, 07:12 AM
  #3661  
Midas D.
 
Join Date: Apr 2013
Location: holland, NETHERLANDS
Posts: 474
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Dave Wilshere
We have people who fly there models with installs like that! :-)

Happy New Ultra Flash year!
Hope mine will end up an bit more descent

UltraFlashy Year to you to Dave,

And for your support on here,
Attached Thumbnails Click image for larger version

Name:	IMG_2836.JPG
Views:	436
Size:	2.45 MB
ID:	1953112  
Old 01-01-2014, 07:55 AM
  #3662  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 13,097
Received 733 Likes on 529 Posts
Default

Nice stickers ;-)
You know you need to removed the excess lip to clear the servo structure-here's one I'm doing.


Happy to help with what I still think is the best all around sports jet yet!
Attached Thumbnails Click image for larger version

Name:	Flash Wing.jpg
Views:	382
Size:	110.2 KB
ID:	1953126  
Old 01-01-2014, 08:53 AM
  #3663  
JPHen
Senior Member
My Feedback: (33)
 
Join Date: Dec 2003
Location: Spotsylvania, VA
Posts: 143
Likes: 0
Received 0 Likes on 0 Posts
Default

Still looking for a wing if anyone has a spare.
Old 01-01-2014, 01:06 PM
  #3664  
Midas D.
 
Join Date: Apr 2013
Location: holland, NETHERLANDS
Posts: 474
Likes: 0
Received 0 Likes on 0 Posts
Default

Got an main gear issue,

I'm using the Jet-1A gear set but now the main's are 5mm higher as the beotec.
The cylinder of the gear sits on the rib pointed with the pen (see pic.)
Inserted the main block of the gear is almost flush with the wing surface and retracted the wheel sticks out of the well for a bit

I can grind/sand out 4/5mm of the rib pointed with the pen (see pic.) but this will not leave a lot of the rib as in, it wil be gone after i'm done….
Is this an Go or an absolute No-Go cause i then will damage the wing strength ??
It's a bit ****ty cause it's the "plug and play" gear set jet-1A offers for the Ultra Flash…………..

Regards,

Ed
Attached Thumbnails Click image for larger version

Name:	IMG_2837.JPG
Views:	315
Size:	1.74 MB
ID:	1953194   Click image for larger version

Name:	IMG_2838.JPG
Views:	366
Size:	2.62 MB
ID:	1953195  

Last edited by Midas D.; 01-01-2014 at 01:37 PM.
Old 01-01-2014, 01:38 PM
  #3665  
siclick33
 
Join Date: Dec 2003
Location: York, UNITED KINGDOM
Posts: 3,743
Likes: 0
Received 1 Like on 1 Post
Default

I think that there should be some packing pieces in the kit that lifts the retract unit a little. This might give you enough clearance without the retract/wheel sticking out (you can see it in the photos in the instructions).

On my Classic Flash I didn't notice these packing pieces so removed quite a bit of the rib where you have marked it in your photo. The wing is very strong and removing some of that rib material didn't seem to make any difference at all.
Old 01-01-2014, 01:57 PM
  #3666  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 13,097
Received 733 Likes on 529 Posts
Default

Like Darren says there is a sheet of packers (to suit Behotec C-36 units) I'd pack the unit to be flush (you have CSK holes on the Jet 1A so screw heads are not an issue) and take a little out of the rib. Its not a key strength.
The wing was designed around the C-36 and that is all I have ever used as they are perfect. Jet 1A spring air means you need to lock the gear up to store the wing in its bags and that's an added faff

Jet 1A did a Hawk set for the CARF model, I bought one and the nose unit did not fit/work with a cockpit so I still have that in stock as a paper weight!
Old 01-01-2014, 02:02 PM
  #3667  
husafreak
My Feedback: (3)
 
husafreak's Avatar
 
Join Date: Dec 2004
Location: Livermore, CA
Posts: 1,202
Received 50 Likes on 42 Posts
Default

At that point there is so little rib material that I doubt it would be a big problem. There is almost no strength there so the structure is probably engineered around that point. If it was me I would cut away the rib then grind away the Hysol fillet either side of the rib and reapply it with 2mm CF rod in the new Hysol fillet for 30-40mm. That would be as strong as stock and help ensure the rib doesn't buckle at that point. Just an idea
Old 01-01-2014, 02:12 PM
  #3668  
dubd
 
dubd's Avatar
 
Join Date: Aug 2007
Location: Bay Area, CA
Posts: 4,313
Likes: 0
Received 2 Likes on 2 Posts
Default

Maidened my UF a few days ago. Based on recommendation for other people I set my CG at 245mm... I've owned a number Flash jets and prefer the plane slightly tail heavy, so I didn't think this would be an issue. Wrong! The UF was way too tail heavy! Almost to the point of not being controllable. Fortunately I was able to land the plane without any damage. Had to come in shallow without any flap. Not sure if having the saddle tanks for fuel at 245mm makes a difference. I highly discourage using this CG point if you're using the saddles. I added 8oz to the nose and I'm at at 235mm back. The planes flies much nicer now.
Attached Thumbnails Click image for larger version

Name:	image.jpg
Views:	133
Size:	1.45 MB
ID:	1953218  

Last edited by dubd; 01-01-2014 at 02:17 PM.
Old 01-01-2014, 02:13 PM
  #3669  
Midas D.
 
Join Date: Apr 2013
Location: holland, NETHERLANDS
Posts: 474
Likes: 0
Received 0 Likes on 0 Posts
Default

Found the packers and filled the blocks up to reach the hight no problem.
Just have to grind down the rib then
Old 01-01-2014, 02:26 PM
  #3670  
Midas D.
 
Join Date: Apr 2013
Location: holland, NETHERLANDS
Posts: 474
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by dubd
Maidened my UF a few days ago. Based on recommendation for other people I set my CG at 245mm... I've owned a number Flash jets and prefer the plane slightly tail heavy, so I didn't think this would be an issue. Wrong! The UF was way too tail heavy! Almost to the point of not being controllable. Fortunately I was able to land the plane without any damage. Had to come in shallow without any flap. Not sure if having the saddle tanks for fuel at 245mm makes a difference. I highly discourage using this CG point if you're using the saddles. I added 8oz to the nose and I'm at at 235mm back. The planes flies much nicer now.
Hi dubb,

Why did you go so far back with the CG as the manual say's 220-225??
Old 01-01-2014, 02:27 PM
  #3671  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 13,097
Received 733 Likes on 529 Posts
Default

Dubd...way to far back!

Non stock gear...!

Dave
Old 01-01-2014, 02:32 PM
  #3672  
dubd
 
dubd's Avatar
 
Join Date: Aug 2007
Location: Bay Area, CA
Posts: 4,313
Likes: 0
Received 2 Likes on 2 Posts
Default

Midas, a friend stated his was 245mm back and it flew great. Perhaps he measured wrong. LOL

Dave, lesson learned! Flies very nice now.
Old 01-01-2014, 02:58 PM
  #3673  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 13,097
Received 733 Likes on 529 Posts
Default

I generally use the recommended settings as a starting point, everyone likes a different feel and then a small amount of weight or battery shifting gives you what you want. Guys who are not experienced tend to stick with the manual settings and that is always at least safe...manufacturers normally have an idea about their designs ;-) 3/4" back would be a big change.
Sounds like you would have had a ride with that one!
Old 01-01-2014, 07:21 PM
  #3674  
dubd
 
dubd's Avatar
 
Join Date: Aug 2007
Location: Bay Area, CA
Posts: 4,313
Likes: 0
Received 2 Likes on 2 Posts
Default

I should have started in the middle of the range, which is what I did for my last Flash and then adjusted after each successive flight.

It it was quite a ride! The UF would have done a loop if I were to let go of the elevator.
Old 01-01-2014, 11:12 PM
  #3675  
Midas D.
 
Join Date: Apr 2013
Location: holland, NETHERLANDS
Posts: 474
Likes: 0
Received 0 Likes on 0 Posts
Default

Okay, stick to the manual then ;-)

Dave,

About the Jet-1A gears. I sense an kind of skeptical opinion on these gears?
Should i bite the bullet and order the Behotec's then?? (got the gears with the kit when i bought it from a guy over here,he uses the same in his classic Flash)
Once i made the Jet-1A's to fit i can't go back………..
It's not that they are really bad are they, they are just a bit "faff" in some point but should do their job fine is suppose??

Cheers,

Ed


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.