Because this Blog is updated regularly it is a good idea to visit at least once a week so as not to miss anything. If however you are not a regular visitor, please use the archive links, at the bottom of the side bar on the right, to view postings that have moved off the main page. Or type a key word in the search block in the black bar at the top left and click on "SEARCH BLOG" and it will take you to the posting within our Blog. (For instance, type "Jart" and all the post that mention Jart will open) The Label at the bottom of a post can also be used. Click to get all posts with the same label together!
This BLOG is best viewed at a screen resolution of 1024x768. Click here to get instructions on how to adjust your monitor to these settings.

Sunday, October 24, 2010

Berg Picture of the Year (2010)

(Click on the picture to open it in a new window and then click on the picture again to make it bigger)

This picture collage was compiled consisting of 11 pictures all taken of the last 11 months of postings from the BERG blog.

Thanks to all of you that have contributed to this year’s postings.
(pictures and articles)
 I hope that next year’s postings on the BERG blog will be as rewarding.

Monday, October 04, 2010

Fireworks at BERG Nats

Crash SceneBurned out wing recognisableClose-up of the centre section

And this is the result of Juanita's now famous "flaming exit" speed run. The model was rather far away and rather low on the last leg of her speed run and "landed" on the HT wires across the road from the B.E.R.G. field.Juanita with towhook and canopy

There was a big spark with the model disintigrating immediately and before we knew it, the dry grass was alight. To make matters worse, there was a bee hive situated in the burning long grass making firefighting a tad difficult.

Here is Juanita with the only parts of her model salvaged:
the towhook and canopy!

Saturday, October 02, 2010

E-slope Mini Pulse successful maiden flight

About a year and 6 months ago I bought a Mini Pulse electric kit from a LHS. At the time these kits were hard to find but if you did found one on shelf in a hobby shop like I did you don’t even argue about the price and just buy it like I have done.

At the time the kit coast around R1250.00 and took about 2-3 evenings to assemble and install my radio gear. But here comes the catch, the Mini Pulse is tail dragger and if you want to ROG it, you will need a reasonable length of smooth run way to do so. The same argument also holds true for when you want to land it.

I was hoping to fly it at the Berg field but as you can see in the pictures the grass is not even enough to allow ROG. So the next thing it did was to hand launch the Mini Pulse only to find that on landing the undercarriage was ripped out and ending up with two neat holes punched into the wing were the wheel pads went in.

After repairing the damage the next thing was to find a field were one could ROG and land the Mini Pulse. So I ended up going all the way to the new GEMS field (in the mean time all forms of e-flight have been banded here as well) and at last I could take off and land from any direction. Now the only problem was to travel the distance but as keen modeler I did not mind doing the trip, however this set my mind into thinking mode and after speaking to Izak Theron (he also fly a Mini Pulse at GEMS) about the undercarriage problem and the possibility of removing it so that I can hand launch and land it on the BERG field, he pointed out to me that the next Items in line will be the under wing mount servos and then the fixed prop that will hit the ground on landing.

So Izak suggested that I mount the servos on top of the wing and ad a folding prop in order to save the prop and electric motor from damage on landing. After milling the Ideas around a bit I thought that I would rebuild the Mini Pulse from scratch with foam and a bagged wing construction including all modifications that we spoke about. The building took about four to five weeks and the Turninge 480 motor, speed control and lipo-battery were bought from Hobby King. The AUW came just under 1 Kg (without the undercarriage) and that is about 100 gram heavier than the normal Mine Pulse.

So as you can see I made the maiden flight yester day and it flew strait away the only difference that I could detect is slightly less vertical performance due to the extra weight. Landing now is now more a pleasure than a headache and as you can see after three landings on the Berg field I could hardly notice any damage on the underside of the Mini Pulse.

It would now also be possible to fly the Mini Pulse from the slope and you can be sure it won’t stay behind on my next trip to Vloksrust , and O yes if you are lucky enough to fly on tar runway you can always put the undercarriage back.

I would like thank Izak Theron for all the Ideas that made this really such a fun project and for Jogen that took all those stunning shots of the maiden flight.

Spectrem Air operates a much modified Basler DC3-TP67 for airborne mineral exploration based out of South Africa. The aircraft was converted at the end of 1992, and has been operating as a turbo-prop since 1993.  More photos here