RE: BTE Delta Vortex Construction Photos  
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    • All Forums >> RC Airplanes >> Kit Building >> RE: BTE Delta Vortex Construction Photos
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    RE: BTE Delta Vortex Construction Photos - 7/8/2007 5:42:21 AM   
    SALMONBUG



    Posts: 1186
    Joined: 2/12/2003
    From: kampenhout, BELGIUM
    Status: offline     		So sad you got bad experience with your, DV....
    YES I am back after two years in hospital i flown my DV yesterday it rested hanging in my kitchen ceiling, but either i am sick I decided to fly it again, as usual he performed incredibly well....
    I am now building some specials thinks for my neveuw (my sister' son), let's say the double whammy is on the building board and also a venture resised for a saito 150, to build this special venture i ordered a wing kit ( four star 120) to sig and I making the fuse myself.
    for people building DV i would recomand to not buy the ARF, buy the kit it's more interesting and give you the possibility to make every kind of modifications.


    I am now actualy in contact with Bruce to find clues to start and put in flight the double pulso double whammy, the resized venture is a easy challenge


    salmonbug

    PS: the four star 60 size kit is not a Bruce Tharpe design, and i have to admit i don't understand the design of the wing, i got one in my hands to build it for a fellow and think that the wings integrety is a bit overkilled


    < Message edited by SALMONBUG -- 7/8/2007 5:53:02 AM >

    _____________________________

    In case of positive climb, gear up !!!

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           Post #: 101

    RE: BTE Delta Vortex Construction Photos - 7/17/2007 11:29:37 PM   
    airbusdrvr


     

    Posts: 767
    Joined: 11/3/2005
    From: New Port Richey, FL, USA
    Status: offline     		Thought I'd post a couple of pics of my Delta Vortex that maidened today. Started June 15, 2007 and flew first flights today, July 17. I was really lucky that the kit assembled very straight. No twist or out of true in the wing at all. I only needed three clicks up trim after take off to fly hands off. During construction I moved some things aft, used hardwood and epoxy aft of the cg in some places(because I knew it would need some weight aft) which resulted in a 21 1/2" CG with no added weight. I presently have one of the Delta Fighter 90 ARFs and didn't like the accessibility associated with the single access panel underneath. I built three access panels on top. These hatches have hardwood frames and sub spars that run from W-2(L) to W-2(R). One hatch is for the tank, second for the servos, and the third magnetically held hatch covers the air receptacle and charging jack/elec switch. Under the mount for the air receptacle and elec switch is the receiver and air tank. It has Spring Air retracts with 3/8" struts, Hitec digital elevon servos, Hitec servos for all the rest. The nose wheel steering servo is programed to only work when gear is down.


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    (in reply to SALMONBUG)
           Post #: 102

    RE: BTE Delta Vortex Construction Photos - 7/17/2007 11:32:16 PM   
    airbusdrvr


     

    Posts: 767
    Joined: 11/3/2005
    From: New Port Richey, FL, USA
    Status: offline     		A couple more pictures.

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    (in reply to airbusdrvr)
           Post #: 103

    RE: BTE Delta Vortex Construction Photos - 7/17/2007 11:33:54 PM   
    airbusdrvr


     

    Posts: 767
    Joined: 11/3/2005
    From: New Port Richey, FL, USA
    Status: offline     		Sitting in the driveway after first flights.

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    (in reply to airbusdrvr)
           Post #: 104

    RE: BTE Delta Vortex Construction Photos - 7/18/2007 9:39:46 AM   
    SALMONBUG



    Posts: 1186
    Joined: 2/12/2003
    From: kampenhout, BELGIUM
    Status: offline     		one more marstepiece...............

    _____________________________

    In case of positive climb, gear up !!!

    (in reply to airbusdrvr)
           Post #: 105

    RE: BTE Delta Vortex Construction Photos - 7/18/2007 12:38:10 PM   
    Rocketman612



    Posts: 2038
    Joined: 1/19/2002
    From: Enterprise, AL, USA
    Status: online     		Nice job.

    Your making me want to start on mine. What was the final weight?

    Can you still get Spring Air's as I thought they were closed??

    Pete


    _____________________________

    "Remember, all im offering is the truth, nothing more..."
    Morpheus

    (in reply to airbusdrvr)
           Post #: 106

    RE: BTE Delta Vortex Construction Photos - 7/19/2007 3:07:41 AM   
    airbusdrvr


     

    Posts: 767
    Joined: 11/3/2005
    From: New Port Richey, FL, USA
    Status: offline     		As I mentioned just above, I have been flying a Delta Fighter 90(Vortex ARF from a few years ago) and it required 16 oz of lead in the tail. I decided to use some heavier materials and liberal epoxy aft of the CG. With the retract gear and all other equipment ready to fly less fuel, it weighs 9 1/2 lbs. It balanced perfectly at 21 1/2" forward of TE.

    (in reply to Rocketman612)
           Post #: 107

    RE: BTE Delta Vortex Construction Photos - 7/19/2007 12:08:28 PM   
    airbusdrvr


     

    Posts: 767
    Joined: 11/3/2005
    From: New Port Richey, FL, USA
    Status: offline     		Oh, Spring Air is alive and well. Go to http://www.retracts.com/. I bought the 700 series with 3/8" struts. Presently the supplier for the 3/8" struts is not that great and I'm changing to the 7/16" ones for the main gear as the quality is supposed to be better.

    (in reply to Rocketman612)
           Post #: 108

    RE: BTE Delta Vortex Construction Photos - 8/24/2007 8:42:07 PM   
    airbusdrvr


     

    Posts: 767
    Joined: 11/3/2005
    From: New Port Richey, FL, USA
    Status: offline     		The last month has been a bit frustrating. First, the Spring Air retract gear was substandard and had to be replaced with Robart struts still using the installed Spring Air retract actuators. Then I had problems with the engine wanting to die when slowing in the pattern for landing. Bubbles were seen between the needle valve of the the OS91FX engine and the carb. The engine had the old/original needle valve design which was prone to bubbles. I then ordered a Cline Fuel Regulator and a new OS91FX and they were installed this week. Ran two tanks of fuel through it yesterday for breakin and flew it three times today for its first flights with the new engine and fuel system. After a few more engine breakin flights I hope to have a good report. The plane flies beautifully and now if the engine stays stable, which it was today, she will be perfect.

    (in reply to airbusdrvr)
           Post #: 109

    RE: BTE Delta Vortex Construction Photos - 8/25/2007 12:20:34 AM   
    SALMONBUG



    Posts: 1186
    Joined: 2/12/2003
    From: kampenhout, BELGIUM
    Status: offline     		I can't understand why modeleres have so big troubles puting in flight this easy airplane, the 91 fx is known to be a bad engine, but mine work well as soon you use good fuel and don't have any fuel feeding troubles

    _____________________________

    In case of positive climb, gear up !!!

    (in reply to airbusdrvr)
           Post #: 110

    RE: BTE Delta Vortex Construction Photos - 11/14/2007 11:28:09 PM   
    airbusdrvr


     

    Posts: 767
    Joined: 11/3/2005
    From: New Port Richey, FL, USA
    Status: offline     		Thought I would update my Delta Vortex build and experiences. This aircraft has retract gear which made the fuel tank location to be back in the center of the wing as the nose gear took the original fuel tank location. The fuel tank is about 11" to 12" behind the engine. The original configuration had an OS 91FX installed. Tank distance and the old style needle valve(bubbles) didn't run reliably. Next configuration was a new OS 91FX with a Cline Fuel pressure system to correct the tank to engine distance. It ran but not well. It is my opinion that the OS 91FX venturi style carb is not really compatible with a pressurized fuel system. Now I have installed a new YS61 pumped two stroke side exhaust engine. Yesterday the first test flight went very well. I have also changed the radio system from 72Mhz to the 2.4Ghz JR R921 receiver with a JR X93903 transmitter. During the radio change I used a five-cell battery that replaced the four-cell battery. The battery is in the very aft bay between the rudders. The YS 61 seemed to weigh exactly the same as the replaced OS 91FX. The 16 oz Hayes fuel tank was reduced to a 13 oz Hayes tank. All of these changes obviously shifted the CG aft just a bit. When flying inverted before the changes, a bit of forward stick was required to maintain level flight. Now little if any forward stick is required when inverted. So the CG is now just about perfect. With all controls centered for the first test flight after the engine and radio changes, no trim whatsoever was required after takeoff. The plane is built perfectly straight and is now balanced very well CG wise. Hopefully, after all these months of engine, fuel and landing gear hurdles, she will start to be a good and reliable flier. A couple of pics of the new YS 61 pumped two-stroke engine.

    Nov 20, 2007 Update: Six flights now and not a single fuel issue. I think the fuel issues are over and many nice flights awaits this Vortex.

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    < Message edited by airbusdrvr -- 11/21/2007 12:39:31 AM >

    (in reply to airbusdrvr)
           Post #: 111

    RE: BTE Delta Vortex Construction Photos - 12/29/2007 5:54:21 PM   
    Strykaas



    Posts: 4037
    Joined: 3/21/2003
    From: Paris, FRANCE
    Status: offline     		OS sometimes sucks really bad. You just have to admit it.

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    ProBro #2077
    http://image2-0.rcuniverse.com/e1/forum/upfiles/57402/Nl29490.jpg

    (in reply to airbusdrvr)
           Post #: 112

    RE: BTE Delta Vortex Construction Photos - 12/29/2007 10:46:41 PM   
    Rocketman612



    Posts: 2038
    Joined: 1/19/2002
    From: Enterprise, AL, USA
    Status: online
    quote:

    ORIGINAL: Strykaas

    OS sometimes sucks really bad. You just have to admit it.



    At least the 91's do. When I do my DV she will get a Webra 91 It will cost more but what the heck it's only money

    Pete


    _____________________________

    "Remember, all im offering is the truth, nothing more..."
    Morpheus

    (in reply to Strykaas)
           Post #: 113

    RE: BTE Delta Vortex Construction Photos - 1/1/2008 9:41:03 PM   
    SALMONBUG



    Posts: 1186
    Joined: 2/12/2003
    From: kampenhout, BELGIUM
    Status: offline     		I think I am a lucky guy, my only 91fx is flying on my dv (see above in the thread the building of this bird), this bird is now loging 500 flights aproximatly with the same 91 fx in the nose. The engine start at the first chicken stick hit and never stopped in flight, I never had to change any part of the engine.....
    but i have to admit that before the first flight i performed a extensive carrefull breaking in of the engine.
    the engine is still pulling my old dv in unlimited verticals.
    I think the secret is in the fuel I use, home made mixture.....
    Actualy I am very sick and don't have a lot of time to go to the field, I worked in the passed in a major european rc compagny as designer and test pilots, I have tons of birds home, but the dv is still my favorite


    DV is my avatar on RCU, it's because the DV has been been design by one one of the best guy in the model world, I flown most of Bruce's design, they are simply perfect..... (Bruce shorten the nose of the the dv on the next batch, lol)

    < Message edited by SALMONBUG -- 1/4/2008 12:45:53 AM >

    _____________________________

    In case of positive climb, gear up !!!

    (in reply to Rocketman612)
           Post #: 114

    RE: BTE Delta Vortex Construction Photos - 6/7/2008 4:10:06 AM