Jart 3 Canopy

Some good progress this last weekend on this build, I managed to join together all the big pieces,and it is now a Jart.













I fill the join lines and the wing shoulder gusset with micro balloons and some cloth on the wing and tailplane join lines.

After carefully cutting out the canopy, I make two small pieces in the mould, I dont spray the mould , the yellow in this case is pigment in the resin, these are the rough pieces on the wing nearest.











These pieces o about 4 layers of cloth are cut so that they fit on the inside of the fuselage and being flexable and more or less the right contour,
are easy to position and epoxy in place.











In this photo the lip is epoxied in place and the pegs hold two pieces of ply , which will be drilled to accept two small self tapping screws which hold the canopy on.










In the final picture the tear drop canopy has been sprayed black and the rest final coats of yellow.

Next I need to cut out the ailerons and elevator and wire up the servos.

At the moment it weighs 740 grams and feels lightish but battery , radio gear and balancing will change all that.

Hope this one flies even better than the red one.

I have done a slightly different canopy shape, but still starting ahead of the leadind edge so that I can still fit in a fair battery pack and full size receiver in its protective foam.

Some stripes next to tell the top from the bottom , important when doing rolls as these things roll , at a rate nothing short of a frenzy.

Jart 3

Nothing like practice, Jart 3 the white fuselage popped out the moulds no problem. If you build a glass model that you think you may want several of , its always a good idea to pull a mould, especially off a smaller model .If one crashes (does that ever happen to you) you can simply make another.

I am pleased ,I had made a mould , as my RED jart flies great so it is a well proven design. It also allows a fair amount of experimentation , with different lay-ups.

I am sure ,Glen from Durban will appreciate this as he is busy with his Jart using the lost foam technique, and the accompaning sanding and sanding.

PS. for the very sharp eyed, you will note I had in fact previously built a white fuselage so this is in fact Jart 4 , that one was traded to a licensed Jart Plan owner for 4 sheets of blue foam a fair swap I think.

JART no 2 and 3

A little Jart building at last, I sprayed up my moulds a nice rich yellow some months ago and put them aside to finish other projects . Recent outings with my red Jart have really been fun so time to get cracking on number 2 Jart, you cant have to much of a good thing ,you know.

The fuselage came out nice and strong and is now ready to be cut for wings, tailplane and canopy.

The yellow wing is blue foam with 1 layer of 104 gr glass then a lengthways 100 gr UD carbon and finally a 163 gr glass at 45 degress, it all feels nice and stiff and now needs to be trimmed and cleaned up on the leading and trailing edges.

The current weight of these two parts is 680 grams , but it still needs assembly of a tailplane and radio gear. they fly great at about 1.2 to 1.5kg in a fair blow.


With several "white" model projects on the go I always keep my moulds waxed up , and if for some reason some mixed 2k is available I go ahead and spray any excess paint into the next mould , so white it is . These fuselages are also perfect for using up all those off cuts of glass , these I sort and store in seperate plastic bags by glass weight and shapes.

















The third Jart out of the mould is going to be white , and I laid up some ud carbon cross ways
were the wing and taiplane bond onto the fuselage.
Some nice red and blue striping would make this an attractive colour scheme?
go build your own Jart.

Glen Jart progress

I did tell you not to expect too much progress in the short term, but surprisingly, there has been a little.... Last Friday I was able to hand the "completed to this stage" fuselage over to Jacques for him to cut the wings,fin etc. Once this has been done, I will take the fuz back, blend in the wing fillets and fin, and prep for final spray of undercoat and colour. Did I mention that Jacques is planning to make his Jart a 2 piece removable wing option, so that transport to and from the slope is easier?


Again, many thanks to Mike May for his invaluable advice and motivation, especially during the epoxy and balloons/sanding stages.


Pictures of the project so far.....














Lots of carbon goodness for extra strength and vitalty.



Done at last - after lots of filling and sanding. Maybe my lack of glassing skills have something to do with it.

See what Mike Ma(y)de me do!

Well, it all started with Adrian B in Cape Town being reluctant to part with a blemished Jart fuselage and then followed by the non appearance of Santa down my chimney in December 2007, so it was decided that there was only one thing left to do! Seeing as the mysteries of composite construction were being unravelled to this newbie via another project I had embarked on (also coutesy of Mike May and the Sungazer event), I decided that, with advice from Mike only being a phone call away, that I would try my hand at this Jart thing. Please, dont expect miracles and hope to see this thing fly before December this year (2008), as I am a slow builder with LOTS of distractions. I checked the other day - I received my plans from Reed in March 2006! (does that tell you something).


By the way, this plane is being built for my flying buddy and neighbour Jacques, who will be assisting along the way.


Here is the progress (or lack of) so far....

Fuselage shaped out of isoboard foam, with first layer of very thin glass cloth added. Dont ask me details such as weight of glass cloth etc because I dont have a clue - I just do what Mike tells me to.....

More to follow in the coming months.

Mikes Jarts No 2,3

With the local gliding scene moving to the thermal competetions there has been a break in Jart activity.

The sucess of my red Jart has prompted me to build 2 more, my son has his eye on one , so I am glad I bothered to make a mould.

I spray the moulds and , during other layup projects I use the off cut glass cloth , that comes from wing layups were the roll is cut at 45 degrees and there are big off cuts. I then build Jart and other fuselages.

Will post progress of these two as I go

later.

Mike's Jart

Well back from Volksrust , and maidened the JART successfully, a group of us went down for 4 days and generally the wind seemed to really pick up in the afternoons.
The first day the wind was ok for Zaggi flying but just not enough for the JART.
Thursday produced better conditions on the south slope so I decided to give the Jart a go.
It went straight out and only needed two clicks of up trim, left and right was spot on.

The video shows the moment of truth , unfortunately the wind dropped after a few minutes, and the jart just could not maintain altitude , it landed about 20 mtrs down the slope but was unharmed.

In the afternoon later in the day the wind swung easterly and we flew the eastern point , great lift and the Jart was, in its element it does all the things everyone raves about , its smooth flying when it has a some speed is most impressive , it does not like to be slowed down . The landing was down wind in a bit of a rotor and it cartwheeled on landing , slitting the nose open. That evening I rejoined the split which was on the join line with some cloth and it was good to go.

Saterday saw us back on the Northwest slope this time and at about 14-00 hours the air looked Jartish ready, this flight went off all wobbly until I realised I had the max rate set on my dual rate switch for ailerons a quick flick and she settled down nicely.

This flight was excellent and I pushed the Jart a little more with rolls and loops, what made it really special was that for the first time Blake my son stood next to me flying his Zaggi totally unaided so he has pretty much gone solo. The landing was fast and smooth with only a little flare, right at the end to prevent the nose(pointy in case you havent noticed)from spiking the ground.....

conclusion its a lovely design looks great in the air and is a perfornance machine ,well worth building one.

PS I have already started no 2. and have completed the fuselage already,I will post a mini build thread as I go , not so much the construction but the enhancements to the red no 1.

cheers for now.