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The new D-CAT air trap

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The new D-CAT air trap

Old 08-28-2016, 08:44 AM
  #51  
Birdman6310
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Originally Posted by SECRET AGENT
Why do you buy a pretty car, does the paint make it go faster? Seriously????
Hardly the same is it. A pretty car is a finished product the D trap is a small part of a finished product inside the jet. It would be like having a pretty shiny anodised alternator inside the engine bay of the car if you want the to use the car analogy.

Or as an alternative having designer underwear that no one can see

Last edited by Birdman6310; 08-28-2016 at 08:46 AM.
Old 08-28-2016, 08:45 AM
  #52  
SECRET AGENT
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I guess you have never looked under the hood of a car at a car show.
Old 08-28-2016, 08:48 AM
  #53  
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Originally Posted by SECRET AGENT
I guess you have never looked under the hood of a car at a car show.
Yes I have looked under the bonet and have seen many things at a car show and that sort of proves my point don't you think............................. It is all about bling
Old 08-28-2016, 08:50 AM
  #54  
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Whatever you say little buddy
Old 08-28-2016, 11:24 AM
  #55  
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Looking forward to seeing you mate. Long way for a week!
Old 08-28-2016, 11:43 AM
  #56  
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BIRDMAN your comments are distructive not constructive, why don't you find something better to do other than keep making comments,that have nothing to do with this thread. this is the very reason that some of our experts don't post here anymore, because of comments like yours that are nothing but bad mouthing people...............nuff said

Last edited by nobbybasher; 08-28-2016 at 11:45 AM. Reason: mistake
Old 08-28-2016, 11:59 AM
  #57  
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Originally Posted by nobbybasher
BIRDMAN your comments are distructive not constructive, why don't you find something better to do other than keep making comments,that have nothing to do with this thread. this is the very reason that some of our experts don't post here anymore, because of comments like yours that are nothing but bad mouthing people...............nuff said
Man, don't even bother posting to this troll, you play his game. Just use the ignore function of the forum and all his comments will disappear. Once trolls are ignored by most of the users they become non existent.
Old 08-28-2016, 01:24 PM
  #58  
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Originally Posted by nobbybasher
BIRDMAN your comments are distructive not constructive, why don't you find something better to do other than keep making comments,that have nothing to do with this thread. this is the very reason that some of our experts don't post here anymore, because of comments like yours that are nothing but bad mouthing people...............nuff said
So all you feel should be posted is fan boy stuff and positive comments is that so. What if people think that this is unnecessary bling that solves problems that don't exist and will most likely be overpriced. I have had some PM'S agreeing with me on this

Marc thanked me for those comments if you read back and also I asked if it was necessary for the anodising work, Is that not a valid question
Old 08-31-2016, 06:30 AM
  #59  
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If your post disappeared consider that your warning to back it down a notch.

If your post quoted a removed post and contained something useful, feel free to repost that information, sorry I'm not editing out individual posts.

Please keep it civil
Old 08-31-2016, 08:07 AM
  #60  
marc s
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DCAT large back from anodisers, just waiting for the chromed barbs to complete.



It's going to be tight to get the DCAT medium and DCAT ultra done in time as Garry Barr my cnc guru is busting with work right now, hopefully he/we can get some done in time.

Will have stock at Jetpower of the following:

New DCAT large
CAT V2 large
CAT V2 medium
Maglok Probe
Maglok Vent
Maglok Stopper
Bullet 6
Bullet 8

A set of brand new Weatronic rx stuff in plastic case.

Assorted TP lipo packs from my own stock - most new and unused.

As said hope to have the DCAT medium and DCAT ultra there too but these might be a struggle.

I will also have my demo VIXEN sports jet with me for anyone who might like to buy it, currently turbine free but have a new Jet Italia Lion 220 turbine in a box ready to drop in if required. Will be in a crate to make transport easier.

marcs
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Old 09-01-2016, 01:29 AM
  #61  
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Looks great Marc! Looking forward to saying hi and checking out your stuff at the show. One of the nicest guy in the business IMO.

cheers,
Geoff.
Old 09-01-2016, 03:12 AM
  #62  
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Hi Marc, how does the air get expelled from the inner cilinder into the outer one?
Old 09-01-2016, 10:28 AM
  #63  
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Hi,

The end caps have slots cut in the inner tube support which is machined into the end caps so there are around 8 bleed slots at each end that will allow air which ends up unside the inner tube to escape back into tghe outer tank whenever the DCAT is not perfectly horizontal.

If you look closely at the first picture you can see the machined slots.

marcs
Old 09-01-2016, 10:28 AM
  #64  
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Thank you Geoff, come by and say hi.

marcs
Old 09-01-2016, 12:31 PM
  #65  
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Originally Posted by marc s
Hi,

The end caps have slots cut in the inner tube support which is machined into the end caps so there are around 8 bleed slots at each end that will allow air which ends up unside the inner tube to escape back into tghe outer tank whenever the DCAT is not perfectly horizontal.

If you look closely at the first picture you can see the machined slots.

marcs
I imagined it had to work that way, but I am wondering how full does the air trap need to be?
Usually air traps are effective down to about 50% or so of fuel content, while in this one it seems to me that as soon as the fuel level goes below the top of the inner tube (about 75%?), the risk of an air bubble getting stuck in the inner tube and potentially getting sucked into the engine becomes very relevant, is it so?

Thanks
Old 09-12-2016, 05:23 AM
  #66  
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looks good
Old 09-12-2016, 06:40 AM
  #67  
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I never had problems with Festo fittings on any jet on either fuel or pneumatic systems, don't know what all that fuzz is about. Never tried CAT products, but i am happy with my Intairco super traps with festo fittings on my airworld F-100 with P200 SX and my large Carf Hawk with JB220.
Old 09-12-2016, 07:28 AM
  #68  
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Both are good air traps...but neither one are in stock at dreamworks
Old 09-12-2016, 08:19 AM
  #69  
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HI Intairco.

Good to see your post and appreciate you have been 'at it' for some years, I like your products and think they are well designed and I have respect for your experience and resulting market view.

I do have a 'personal' preference about the fittings used on my products (I did design them after all) but do appreciate customers also have their own preferences.
The original CAT and CAT V2 have barbs, the new D-CAT has chrome barbs supplied as standard but as the threaded holes are now M7 this allows the customer to use push fit connectors if he chooses.

Just for the record however, and for 'factual' reference the barbs supplied with the new D-CAT 140 and 240 are 4.7mm ID, the Tygon tube I use for sizing is from Saint Gobain and is 8mm OD with an ID almost bang on 4.7mm. A 4mm ID bore is 12.56mm2, a 4.7mm bore is 17.34mm2 - around 38% larger.



marcs
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Old 09-12-2016, 08:21 AM
  #70  
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Vincent, the CATV2 260 was in stock earlier today at DW, shipped them a batch a week ago, more will go after Jetpower.

marcs
Old 09-12-2016, 10:40 AM
  #71  
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I was looking for the 130 it has been back ordered for some time now
Old 09-12-2016, 05:17 PM
  #72  
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Thanks Peter @ Intairco for your insight on the great Festo vs Barb debate. The much maligned Festo fitting has had a bit of a hammering on a few RCU threads of late.
Old 09-12-2016, 11:06 PM
  #73  
marc s
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Peter no maybe, we must hook up, don't suppose I'm going to be heading down to your neck of the woods anytime soon......

The 6mm is used on the fill line where I've always fitted a smaller bore barb to restrict the fill speed and pressure associated with this process.

marcs
Old 09-12-2016, 11:45 PM
  #74  
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Originally Posted by INTAIRCO
Thanks Roger,

Well I'm sure the facts won't stop the debate.

Shame though when you think that Festo is a fairly large multi national company with an enormous library of easy to access data and specifications for their products.

Cheers

Peter
Some have been commenting that, even though the festos ARE rated for vacuum, they are NOT rated for usage with fuels and they tend to not last much when exposed to kero/diesel, tending to leak under pressure OR vacuum after some time. Personally, I believe festos are OK to use if treated with respect, as anything should be when it has to fly.
1) use as few as possible
2) only use polyurethane tubes
3) change them out, along with the fuel pickup lines, at least once every 2 years
4) do not make tight turns right out of the connector (rather, make a loop and keep the line straight out of it)
So far, following these few points kept me from having any flameout in the 6 years I've been operating turbine engines, and all my planes use 4 or 5 festos each, one or two always on the suction side.
Old 09-13-2016, 12:55 AM
  #75  
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Here is the link:

http://www.rcuniverse.com/forum/rc-j...-fittings.html

Feel free to chime in and discuss the subject there.

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