RE: C-ARF Ultra Flash build Thread + Video

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All Forums >> RC Airplanes >> RC Jets >> RE: C-ARF Ultra Flash build Thread + Video

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RE: C-ARF Ultra Flash build Thread + Video - 4/18/2012 10:28 AM

ricardinho

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hello i just used the jr 8411s ..the plane was designed around these servos..perfect fit no mods or cutting

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RE: C-ARF Ultra Flash build Thread + Video - 4/18/2012 10:56 PM

BoomerSooner

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I'm trying to come up with a set of graphics for my green ultra flash. Any one put a vinyl over the hinge line on the rudder? Does it foul up the movement on the rudder or tear up the vinyl? Just curious....

Parker

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Post #: 1627

RE: C-ARF Ultra Flash build Thread + Video - 4/19/2012 10:14 AM

consoleworld

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in my UF , i cut the sticker in hinge line .

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Post #: 1628

RE: C-ARF Ultra Flash build Thread + Video - 4/19/2012 11:38 AM

BoomerSooner

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Yeah that's exactly what I had planned. Didn't know if it messed up the vinyl where the rudder slid underneath the lip on the vert stab. Looks like its not a problem. Thanks for posting the pic.

Parker

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Post #: 1629

RE: C-ARF Ultra Flash build Thread + Video - 4/21/2012 2:49 PM

Achillesfilho

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Hi Guys.
I just finished my UF.
Should i live the bypass opened or closed?
Thanks.

Achilles.

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Post #: 1630

RE: C-ARF Ultra Flash build Thread + Video - 4/21/2012 2:55 PM

ricardinho

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Oi tuda bom...full bypass...closed.....

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Post #: 1631

RE: C-ARF Ultra Flash build Thread + Video - 4/21/2012 2:57 PM

Achillesfilho

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Thanks a lot Ricardinho.
Muito obrigado.

Achilles.

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Post #: 1632

RE: C-ARF Ultra Flash build Thread + Video - 4/21/2012 8:08 PM

hameed

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Hi Dave
I'm facing problem with my UF, I'm using jb130 engine but the engine is too long and I don't know what to do😢
The engine mont is too back can u pls advice.

My best rgrds

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Post #: 1633

RE: C-ARF Ultra Flash build Thread + Video - 4/21/2012 8:31 PM

Dave Wilshere

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quote:

ORIGINAL: hameed

Hi Dave
I'm facing problem with my UF, I'm using jb130 engine but the engine is too long and I don't know what to do😢
The engine mont is too back can u pls advice.

My best rgrds

Are you talking about the long tail cone on the JB-130? What gap do Behotec recommend in their instructions? Or do you mean the mount position on the rails? Use a JetCat mount??

Dw

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Post #: 1634

RE: C-ARF Ultra Flash build Thread + Video - 4/22/2012 1:00 AM

Peter A

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With the behotec engine you can have alomst all the tail cone inside the tail pipe with no problem.
So it is OK to push the engine back to fit.

quote:

ORIGINAL: hameed

Hi Dave
I'm facing problem with my UF, I'm using jb130 engine but the engine is too long and I don't know what to do😢
The engine mont is too back can u pls advice.

My best rgrds

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Post #: 1635

RE: C-ARF Ultra Flash build Thread + Video - 4/24/2012 11:50 PM

Jamie C

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I have just shown this to Nicki and she loves it! she wants me to get one . . . . . i could not part with money for a pink jet! that aside it does look quite good.

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Post #: 1636

RE: C-ARF Ultra Flash build Thread + Video - 4/25/2012 12:44 AM

InboundLZ

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quote:

I'm trying to come up with a set of graphics for my green ultra flash. Any one put a vinyl over the hinge line on the rudder? Does it foul up the movement on the rudder or tear up the vinyl? Just curious....

I have a huge vinyl sticker on my vertical stab/rudder. I cut it on the hinge line on the open side, did not do anything on the hinge side. Works perfect and has not come up yet and I am at 312 flights....

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Post #: 1637

RE: C-ARF Ultra Flash build Thread + Video - 4/25/2012 3:33 AM

Craig B.

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Get them to do a colour substitution on parts of it and get some black into the mix and I reckon that would "man it up a bit".... Might not look bad after all!

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Post #: 1638

RE: C-ARF Ultra Flash build Thread + Video - 4/25/2012 7:23 AM

Dave Wilshere

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quote:

ORIGINAL: Jamie C

I have just shown this to Nicki and she loves it! she wants me to get one . . . . . i could not part with money for a pink jet! that aside it does look quite good.

Jamie

I think its one of the best colours yet, really suits the model...I've ordered a set of Purple bags for it too! That and Claire's Purple flying jacket she just ordered, we are going to have pink/purple overload soon at the meetings!
Thinking about it...Nicky is right, pink would be good for you, dispell some of the navy myths

Dw

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Post #: 1639

RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 12:02 AM

kirill1958

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Hello everyone, finally I'm getting an UF myself! But I found a strange issue - no one seems to have 70mm air power wheels, so what kind of wheels are you using in your Flashes?

The nose one is usually 66mm, that's I know, but what is the maximum diameter for the mains? 3&1/4" i.e. 83mm is fine? Or is it too large?

Kirill.

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RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 12:26 AM

Mavrik!

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Does anyone make a fuse bag for the UF?

I currently use my child's sleeping bag and they want it back!!!!!!

Mav

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Post #: 1641

RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 12:32 AM

ricardinho

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The inairco 3 1/4 inch....fit perfect..big and great for grass...

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Post #: 1642

RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 12:53 AM

kirill1958

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Thanks a lot, I will order 3 1/4 inch!

2 Mavrik! I tried making a fuse bag myself a number of times, but the best there is - a sleeping bag! Current fuse protection offered by some manufacturers is a simple slide-on piece of cloth to protect the canopy or the bottom of the fuse. Sleeping bags are perfect, I sewed two big ones together to make a fuse protection for the big 2.5 Futura!

So my advise is to get another sleeping bag for kids and leave this for the jet - it probably smells with kerosene now anyway

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RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 7:07 AM

Power Aviation

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Guys I need help with the CG location on the UF, we just finished mine, using a Jet Central Chetaa and no paint or extras on the nose to add unecessary weight. I did use the extra wing and saddle tanks. My understand of the manual is that the starting point is from the wing root, trailing edge. Or will it be from a different point? Is it further back? If its at the wing root it's VERY nose heavy, using the batteries all under the tank and still nose heavy.

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RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 7:32 AM

Robrow

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quote:

ORIGINAL: Modellbau Brazil

Guys I need help with the CG location on the UF, we just finished mine, using a Jet Central Chetaa and no paint or extras on the nose to add unecessary weight. I did use the extra wing and saddle tanks. My understand of the manual is that the starting point is from the wing root, trailing edge. Or will it be from a different point? Is it further back? If its at the wing root it's VERY nose heavy, using the batteries all under the tank and still nose heavy.

As I understand it you are measuring from the wrong place. Measure rearwards from the forward most point of the wing i.e. the flat face where the 2x carbon location pegs are, (wing/fuselage joint), CG should be 220-225mm back from this point.

That is the manual recommendation and where mine came out with saddle tanks(empty), wing tank(empty), uat (full), no nose weight, standard size batts in the 2x pockets and gear up. Others may have adjusted for personal taste after flying but it's a good starting point.

Rob.

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RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 1:07 PM

Power Aviation

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quote:

ORIGINAL: Robrow

quote:

ORIGINAL: Modellbau Brazil

Guys I need help with the CG location on the UF, we just finished mine, using a Jet Central Chetaa and no paint or extras on the nose to add unecessary weight. I did use the extra wing and saddle tanks. My understand of the manual is that the starting point is from the wing root, trailing edge. Or will it be from a different point? Is it further back? If its at the wing root it's VERY nose heavy, using the batteries all under the tank and still nose heavy.

As I understand it you are measuring from the wrong place. Measure rearwards from the forward most point of the wing i.e. the flat face where the 2x carbon location pegs are, (wing/fuselage joint), CG should be 220-225mm back from this point.

That is the manual recommendation and where mine came out with saddle tanks(empty), wing tank(empty), uat (full), no nose weight, standard size batts in the 2x pockets and gear up. Others may have adjusted for personal taste after flying but it's a good starting point.

Rob.

Many thanks Rob!! I will measure right away, I was doing it backwards.

Cheers!

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RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 1:34 PM

sc0tt

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I just received a new Ultra Flash and noticed a structural material change in the wing and stabs. It appears CARF has switched from laminated balsa wood to the green laminated foam like Tomahawk Design. Nice to know they keep improving their products.

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RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 6:47 PM

indubitably

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Im not sure foam is a structural improvement. It may be lighter, cheaper, and easier to build with but foam is not a structurally better material than balsa. It has to do with compressibility, and memory.

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Post #: 1648

RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 6:58 PM

Dave Wilshere

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quote:

ORIGINAL: sc0tt

I just received a new Ultra Flash and noticed a structural material change in the wing and stabs. It appears CARF has switched from laminated balsa wood to the green laminated foam like Tomahawk Design. Nice to know they keep improving their products.

The balsa was too inconsistent, so they decided to switch.

Dw

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RE: C-ARF Ultra Flash build Thread + Video - 4/29/2012 7:26 PM

sc0tt

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quote:

ORIGINAL: indubitably
Im not sure foam is a structural improvement. It may be lighter, cheaper, and easier to build with but foam is not a structurally better material than balsa. It has to do with compressibility, and memory.

Balsa cored structures can be affected by humidity and if the skin is compromised problems develop later- especially if moisture, fuel or oil gets in. I still think it is a good move by CARF.

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Post #: 1650

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