Building the new Bushbaby SAFARI

[Oupa-G]

The throttle cables were laid giving attention to no sharp curves and the cable itself is teflon covered and in a teflon sleeve. No oil so no dust collection so no eventual grinding paste. The throttles are silk smooth. Boet your little drums work like a dream. I also enclose a picture of the workshop it is slowly transitioning into CHAOS. so the project must now get finished the starting date is most likely tomorrow and not Monday.

Cheers Oupa-G

[Oupa-G]

Check the previous page I posted some interesting stuff. We jumped from page 31 to 32 but the things I talk about belong together.

Cheers Oupa-G

[Boet]

And now the standard has been upped another couple of notches....... I REALLY REALLY like what I see here. I did not like the thtolle levers supplied, so designed the simple "drum" system. It does not put any "up and down" stresses on the throttle cables, just a staight pull. = No wear. Can`t wait to hear this one make music. Moenie vergeet om olie in te gooi nie!!!!!

[Oupa-G]

Boet the engine oil is in as well as the gearbox oil . I'm having a race with Otto he is brading the harnass and I'm doing the fuel lines .
Meanwhile Vliegvark is welding as I'm writing he is welding the battery support I have tested it to 6g's no problem. I'm sending the pic's of the finished exhaust with the EGT probes in place and the whole exhaust hanging in the airframe really very sexy. We will see how it handles the field environment. There are no stress points and the flexible couplings which I call "olifant slurpies" or just "slurpies" for short . They take out all stresses and I hope this exhaust is as trouble free as my trike's which has now done 260hrs trouble free. The exhaust is such an important item under the cowling and if it goes wrong can give lots of problems quickly.

Enjoy the pics

Cheers Oupa-G

[Oupa-G]

The Bosvark has started running like a clock

Cheers Oupa-G

[Wallaby]

Wow Oupa, and how does the exhaust work. Does it have the necissary noise reduction for the size? It would be interessting if you could put egt probes on the stock BMW exhaust and see what the difference between in egt is in your creation and an BMW's exhaust. Man all this new frontiers are so interesting and there are so many unanswered questions that we need to find.
Good luck to you guys.

[Stephan van Tonder]

Congratulations. I really hope all goes well with this engine setup as this is what I want. If this works trouble free a cheetah becomes a lot more afordable for me.

[Oupa-G]

Initially we had a batch of running on one cylinder I was running on a suspect coil. I helped a traveler that was riding his bike around the world and the agents had a problem sorting out an intermittent misfire according to the computer all was OK and as I had all the parts we started swapping out and found the problem . The suspect coil was used in Otto's test stand. I quickly raided the coil of my Trike and tested the compression put new plugs in and there was a purring sound , the silencer has a nice sound to it difficult to judge in the enclosed workshop. But yes thanks to Otto and Vliegvark giving up their Easter weekend the Bosvark has a beat and from now on we are aiming for end of April. Will send pics later this evening. Must go and eat now.

Cheers Oupa-G

[Oupa-G]

We as a team are flaked out, but it is a nice tired feeling will spend tomorrow just putting the workshop back into order.
When the concentration is so intense this slowly turns into a chaos, and that is where we are now I have the pictures to prove it. Of to an early night.

Enjoy the pics

Cheers Oupa-G

[Oupa-G]

I see #24000 hit is something of the past . I'm overwhelmed by the response in my wildest dreams I never realized the strong desire of pilots to know and read about technical detail. The engine has started and runs well ,we have not had the prop on because a turning prop in a workshop is a nightmare everything gets blown of the walls etc.Luckily the performance of the engine has already been test flown. So now for finishing the other detail. I will keep you all posted and again pledge honest reporting of detail. No pics because I'm not close to my camera. Will update tonight.

Cheers Oupa-G

[Oupa-G]

Spent most of the day re-organizing the workshop so now at least for the next week we will not be able to find anything till we are again used to the different state. Today had a visit again from Boet of course we again started the engine and we all uuuuuhd and aaaaahd at how smooth the engine is running. Suddenly I realized that the whole A-TEAM was together so the historical photo was taken. Did no work tonight my rekkies were pap. Had a hard day at work and actually my whole week is looking pretty tough. But I will survive. Enclosed a photo of the legendary Team


Cheers Oupa-G

[MYR]

Congratulations.

Now, we are in a hurry to read your descriptions of flights.
I think the most important is to verify the engine temperature and perhaps to improve the cowl as to direct the warm air flows better ?

As I'll have an air cooling engine on my future BB Explorer, I am wondering if I'll not try to use little propeller anemoters and temperature probes inside the cowl.
The problem would be to find remote models. These ones are not exactly that I wish http://www.rbi-fr.com/accueil_appareils ... helice.htm I would be glad if someone could give me informations about those sorts of items.

As to choose the good model of anemometer, Do someone have an idea of the air speed at the air outlet ? (for BB, kitFox, etc)
Thanks.

[Oupa-G]

Myr this is not a supersonic aircraft so the airflow is relatively simple through the cowling. During the test flight an airspeed indicator will be connected to high pressure side of the cowling and another airspeed indicator to the low pressure side of the cowling then both instruments will be connected to the same static source. That will give the differential . the inlet oil temp as well as the outlet oil temp on the oil radiator are monitored we want a 30 degree C drop in temp . On the engine itself the cyl heads are monitered as well as the core oil temp. Judging all these figures will give the efficiency of the baffle system . In principal there is no difference between a purely aircooled engine instalation and an air oil cooled system . There must be heat exchange. I hope this answers your question
Kindest regard

Oupa-G

[Oupa-G]

Being of line was an empty feeling. However we had some exciting news the owner of WATERJET was visiting us over the Easter weekend and was inspired by the Bosvarkie. He had seen all the many parts his company Waterjetted for us that included the Gear. So he arrived yesterday with the new panel for Bosvarkie what was more special it came without an invoice.His name is Simone Baschieri he rides offroad bikes with Vliegvark.Now with the panel finished the serious heading towards finishing is now in the pipeline. We have decided to put the panel on three hinges so that the working on it will be easier.We have also made little protective fittings for the vital switches that should not be switched of accidentally.

Enjoy the pics

Cheers Oupa-G

[Oupa-G]

Did some minor adjustments to the battery support. Also tested the support to 6g loading without deformation. Could not resist quickly putting the MGL instrument and the control of the prop. The only conventional instrument is an airspeed indicator also note the position is foremost left and high this is where you look during landing. I often see panels with the airspeed indicator in other places on the panel. This is not ergonomically correct during landing. Enjoy the pics.

Cheers Oupa-G