PRIME - RES "New Kid on the block!" Vorstellung ein Neues RES-segler

[GliderKing1]

Time to complete the PRIME Electrical fuselage.

First picture shows the bottom side of the fuse and here you can see that the tow hook space is closed and a balsa piece is glued in place, the small open space is the ballast chamber. Pic 2 shows the servos I´m useing, the BL-motor is a Leopard 2826- 1150kv with a 31mm spinner and foldable propeller 9,5. My motor setup is a bit of "overkill" but I like the "need for speed"!

The fuse is a bit tight for this motor so I had to sand down the inside of the fuse a bit and I have built upp the underside of the fuse front bottom appr. 6mm´s and in front this gives me an opening for air cooling, se pic3.

Pic 4 / 5 shows the fuse contour with the BL-motor mounted

Pic 6 / 7 shows the difference between Thermal and El-fuses

Pic 8 / 9 shows the covered El-fuse

 

[GliderKing1]

El-fuselage finished with radio gear/BL-motor and the Lipo battery a GENS 2 cell 800 maH. My 20 amp (max up to 30amp´s) speed controller and motor can handle up to a 3cell Lipo if needed!

 

[GliderKing1]

Positioning and glueing of the Elevator to the El-fuse.

So now the Electrical version is ready for its Maiden flight, pics will follow.

 

[GliderKing1]

The ballast boxes for the PRIME

Here I have 3 different weight setups, 3, 12 and 18 grams

 

[GliderKing1]

Finally, some real nice and varm summer weather this weekend which gave me the opportunity to make some real good tests of both the Thermal and Electrical PRIME fuses. I also brought my other RES gliders and made some comparisons.

Pic1 shows the different fuses

Pic2 gliders mounted

Pic3 my Explorer Q 4meters light F5J glider as comparison in size....

On my PRIME thermal fuselage I ended upp, after several tests, with the tow hook as far forward as possible and that gave me real good heights and after some trimming of the glider I have the CC at 69.1mm using a 1 cell LiPo of 600maH and tot flying weight appr. 520gr. With this setup I reached the 6 min. flying time with ease. So with this I´m satisified.

With the PRIME Electrical fuse I ended upp with the CC at appr. 71mm with a 2 cell LiPo at 800maH. With this battery I could make 6-7 re-flights upp to 200meters height. Flying weight appr. 560gr.

On both models I have the rudder throws at appr. 55mm/side and 25% expo and elevator 25mm upp and 12mm down and expo 25%. This suits my type of flying and of course the elevator upp (25mm) is too much but a good security to have IF needed! I only use about 10mm in reality.

I have used Hobby King´s std covering foils and not the lite versions which other manufacturers have in their assortment and I suppose that the weight difference on a complete glider is something like 40-50grams.

As usual more and more tests will have to be carried out just to find the optimal setup and there´s a lot of factors involved like the weather, wind, sun or no sun etc...

 

[Loet Wakkerman]

The ballast boxes for the PRIME

Here I have 3 different weight setups, 3, 12 and 18 grams

Are the ballast boxes 3, 12 and 18 grams?
Or is it the ballast?
I use 40, 80, 120 and 160 grams in my Purito's.

 

[GliderKing1]

Are the ballast boxes 3, 12 and 18 grams?
Or is it the ballast?
I use 40, 80, 120 and 160 grams in my Purito's.

Its the ballast, I happened to have these weights laying around and aim to melt som lead in the boxes for heavier weights. Txs for yr info on yr weights, good to have some references. Have you ever used yr ballast? if so, which one is most frequently used?

 

[Hans Hoffmann]

I agree with Loet, you sometimes need this ballast. I nearly have the same ballast for my RES-gliders. With your light ballast its hard to see any difference in flight.

 

[Loet Wakkerman]

Its the ballast, I happened to have these weights laying around and aim to melt som lead in the boxes for heavier weights. Txs for yr info on yr weights, good to have some references. Have you ever used yr ballast? if so, which one is most frequently used?

I have used all the weights this year and I regretted that I didn't have 200 gram of ballast on the last competition. That will be made before the German Open F3L.

 

[Adrie66]

Ballast in the fuselage is max 110 gram but in the wing you can go to almost 200 grams of ballast.
Qustion is of the structure of the Prime can handle it