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BTE Delta Vortex Construction Photos

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Old 02-25-2017, 01:23 PM
  #251  
SALMONBUG
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Originally Posted by BruceTharpe View Post
I will take care of you Philippe, don't worry about it.
Thanks a lot Bruce

woops, seems inspiration to deviate from stock is coming tonight ( it's 10 PM here)

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Old 02-27-2017, 09:55 AM
  #252  
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here is a pic showing ply rib doublers and notches for landing gear plate support spars on w2 and w3. They are different than on my first one. on my first one I made a design mistake, in fact the landing gear plate was glued against the ply rib doublers and spars . on this one the plate will rest ON the rib doublers and ON the spars (it's more logic and more strong)
On my first one I corrected that mistake by putting big congere of epoxy/micro balloons on the joints. On this one the setup will be more straight.

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Old 03-01-2017, 05:22 AM
  #253  
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Maybe I still have troubles with my head trauma, but I searched the entire box for F2 with one hole like on the plans and instructions without result, I found a similar part with 2 holes....... Due to his dimensions I am convicted this must be F2. I don't remember I noticed that in the past .
Maybe I received a custom one to route my fuel lines


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Old 03-01-2017, 07:05 AM
  #254  
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Yep, you got the correct part. F-2 is a simple rectangle with an offset hole - very easy to glue in upside-down. So I added the second hole to make it symmetrical.
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Old 04-27-2017, 01:21 AM
  #255  
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it's a long time I didn't post any progress on my retract DV

The facts are that I started the airframe on the kitchen table who was the only one to be large enough for this huge delta. I was working slow and my girlfriend became fed seeing the kitchen full of wood , tools and plans. She asked me to move the partialy assembled structure in a other place.
I managed to move the partialy assembled basic structure (very fragile), to a fellow who have plent of place.
Once my friend saw the DV on the board, he decided to build one for himself in the same time I finish miine. Because my friend has not a lot of experience with kit building (he only assembled ARF ). He asked me to work together, making the same things on the two planes at the same time. Because he wants also retracts on his future Vortex I decided to wait before making any more progress on mine.. Either placing a retract on a DV is not extremely difficult, I think it's not a good idea to try that alone when it's your first attempt to build a kit.
So this afternoon I wil order a DV kit for my friend. and we will continue the assembly on booth airplane together.

to be continued soon.

PS: works on the two DV could take some time, because my other project for this year will soon be satrting. the reaction 54 kit ............
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Old 04-27-2017, 01:22 AM
  #256  
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it's a long time I didn't post any progress on my retract DV

The facts are that I started the airframe on the kitchen table who was the only one to be large enough for this huge delta. I was working slow and my girlfriend became fed seeing the kitchen full of wood , tools and plans. She asked me to move the partialy assembled structure in a other place.
I managed to move the partialy assembled basic structure (very fragile), to a fellow who have plent of place.
Once my friend saw the DV on the board, he decided to build one for himself in the same time I finish miine. Because my friend has not a lot of experience with kit building (he only assembled ARF ). He asked me to work together, making the same things on the two planes at the same time. Because he wants also retracts on his future Vortex I decided to wait before making any more progress on mine.. Either placing a retract on a DV is not extremely difficult, I think it's not a good idea to try that alone when it's your first attempt to build a kit.
So this afternoon I wil order a DV kit for my friend. and we will continue the assembly on booth airplane together.

to be continued soon.

PS: works on the two DV could take some time, because my other project for this year will soon be satrting. the reaction 54 kit ............
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Old 12-09-2017, 09:59 AM
  #257  
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Post pics. I just found a NEW in the BOX arf delta... I am trying to talk myself out of buying it.
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Old 06-17-2018, 12:21 AM
  #258  
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Hello All,
Is this thread still going? I hope so ... as I've just taken delivery of a new DV kit, and would like to seek advice and share tips etc.
I cant wait to start building but have a few work things to take care of first. However in preparation i had nowhere near big enough to lay this plan out out so treated myself to a new rather large building board. It will be made from an 18mm piece of MDF (so warp proof), it's 60" x 40" and I'll cover that with a layer of 8mm cork roll so i can use pins in it. Hopefully that'll make sure i build straight ...
What I'll do with such a large board afterwards is anyones guess
i'm up in Scotland by the way.

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Old 06-17-2018, 07:26 AM
  #259  
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Originally Posted by Knuks-2 View Post
Hello All,
Is this thread still going? I hope so ... as I've just taken delivery of a new DV kit, and would like to seek advice and share tips etc.
I cant wait to start building but have a few work things to take care of first. However in preparation i had nowhere near big enough to lay this plan out out so treated myself to a new rather large building board. It will be made from an 18mm piece of MDF (so warp proof), it's 60" x 40" and I'll cover that with a layer of 8mm cork roll so i can use pins in it. Hopefully that'll make sure i build straight ...
What I'll do with such a large board afterwards is anyones guess
i'm up in Scotland by the way.
Your best bet is to start your own build thread. Salmonbug might be back tomorrow but there is no way to be certain. A particular plus to this model is that the designer seems willing drop in and give advice. I haven't had the opportunity to build one of Mr Tharpe's models but I have built a Holy Smoke and a Force One. One nice thing about deltas is that for all their speedy appearance they tend to have pretty pleasant low speed characteristics.
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Old 06-27-2018, 04:48 AM
  #260  
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Hello Knuks-2. I've been to Scotland (Kinloss, Mildenhall) and love your country. If I ever emigrate, it would be there, I'm sure.

I am on my 2nd of 3 DV's and love it. (first was bought, 2nd was built and still flying, 3rd is still in the box). You are going to find the parts are unbelievably precise. I was able to build mine on a new building board (.9 x 1.4M (36" x 54") ) - without a problem. It's better if you can walk around all four sides for easy access.

As a point of order, I placed my throttle and steering servos back aft, just ahead of the battery/rx compartment to help the CG. I only mention this in case you wish to do the same - you could plan ahead for the routing of the pushrods.

I bought my first DV at an Auction (owner was unable to fly any more) and he had mounted his engine side saddle. That helped with apres-flying cleanup by pointing the exhaust down.

When I built mine, I originally mounted the engine upright. But, after an 'unplanned landing' I changed that to sidewinder myself (see photos). It meant that I had to knock off about 25mm of one LE to fit the cylinder. I'm flying mine with an OS-91FX on a 14x6 prop but will probably change to a 14x8 prop just for the speed.

For the record - flying this airplane is easy. My unplanned landing was the result of a stiff side breeze in the pits flipping the plane over. I should have been more careful how I parked the airplane.





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Old 01-15-2019, 02:07 PM
  #261  
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I am back on this thread. It's a long time I didn't posted . If you read my previous post I was buildind two retract DV with a fellow before I disapeared for a long time.
I had a lot of changes in my life and had plenty of other RC projects. The two DV were finished and are flying in hands of fellows and performing well

I have been in contact with Bruce Tharpe last week and he told me that he will produce kits in 2019 ( he has been very busy on other project in 2018).

To anticipate the new batch of DV I ressucitate this thread and invite you to follow my next rc project that will be based on a DV kit I have laying here.
The building of the project could take some time because I work a lot for the moment and I have also to move to a other house, but I will post pic of every step on the huge mod I am planing..

This picture will show you what I have in the hoven. I duno if it has already been done. There will be retracts also.
I plan to stay as much as possible close to the original shape of the DV ( no big fuselage), but a nose section will be necessary to balance the plane. The fuel will be in the wings in two soft fuel cells ( around 1 liter each).
All the plans are in my head already


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Old 01-15-2019, 05:24 PM
  #262  
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Shiny! I am happy to hear this excellent news from you. I knew I stayed subscribed for a good reason.
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Old 01-15-2019, 06:19 PM
  #263  
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I give you already some results of my primary head scratching.

My first idea for placing the turbine was to put it above the wing between the fins and tilt it slightly to correct the pitch up trend involved by the fact the trust line would be above the wing chord. That would have allowed me to keep the structure nearly stock around trailing edge of the center section ( easy setup) . In an email exchange with Bruce he told me that if he had to do a turbine DV he would have placed the turbine closer to the wing chord.

I had rejected this idea for two reasons . The ground clearance during flair, but also mainly because I tought huge mods would have to be done to the stock structure to reinforce the back of the wing ( due to the fact a huge part of the wing trailing edge would be missing.

Tonight I came back home with a kingtech 45 and made some measurements . I have to say it would fit just fine between the two root ribs making the structural mods not so enormous after all ( I plan some CF carbon fiber in front of the turbine cutout and maybe also on the trailing edges each side)
The ground clearance would be ok also.

The retract will be electrical, because I don't have a lot of space to place all turbine equipement so I prefer to skip the instalation of a pneumatic valve , servo, bottle and so on. Electrical also require batteries and that's fine because I will need weight in the front.
The instalation of the gear will be very similar to the one I made on my first DV ( go back in 2004 on this thread there are plenty of pics)
The gear will be instald something like one inch more backward to have room space for the fuel cells that will lay around the CG.
The fuel cells will be placed around the CG and custom made to match this project ( That will be done by a specialist because I don't have tools to make them)
I decided to use soft fuel cells ( either a multiple flat conventional tanks could do the job), to keep the project simple and also because by using those tank you don't need an UAT. rough measurements showed me I could place 2 cells of 900 ml placed on the cg . That will give reasonable flight time
The front section ( called engine box on the DV), will be entirly modified to make a reasonably long nose . and will extrude the leading edge for at least the lenght of a 2 cells 4000 mah lipo battery pack

It's 3 am here in belgium, I am near the cerebral explosion ,), so I go to bed

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Old 01-15-2019, 07:02 PM
  #264  
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I was on the way to bed when a question came in my mind.
I remembered my last flights with the DV a long time ago and I ask myself if the deflection of both rudders ( aibrakes mode) would be suficient to fight against residual trust ........
I won't sleep
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Old 01-17-2019, 02:50 AM
  #265  
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As I posted earlier, they could be a long delay before I start the assembly on this one. I have to move my workshop to a new house.
I made some precise measurements on the turbine DV project and I will order the custom made fuel cells already. The delivery delay is aproximatly 2 months so they will be delivered for the begining of the building.
I will also already make some stock subassemblies, like fins. I won't post pic of that because it has already been covered a lot of time in this thread

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Old 01-17-2019, 03:11 PM
  #266  
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went on bte website to see the DV gallery. I saw I am far away to be the first one converting DV to turbine, but I also saw that all previous turbine DV have the turbine above the wing. That was my first idea. But I will stay in the way of Bruce's suggestion to place it as close as possible of the wing chord. based on my previous retract DV experience ( fit with glow engine and shortened engine box ) I will make momentum estimations about how long should be the nose section .
By the way I don't plan any canard on mine

I will refrain to post each time I change my mind or take a decision, otherwise on this cool project, otherwise I will post tons of stupid things. come back to you when building start

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