Awesome

[Kwickkwack]

Hi all,
Went to our club meet last night,
What a night, perfect flying conditions, flew six packs in total on the Twister 3D and the Mimi Titan. even managed to get a little video, all I have to do now is work out how to upload it to share with all.
To top off the night, one of the club members, (and shop owner) bought along his latest toy,
It wasnt a Heli, but this was no ordinary plane, this was a Jet, I believe it is called a bobcat, had a small jet motor, and he did a quick demo flight, and when I say quick, I mean QUICK. the sound was awsome, and at about 150mph very very fast. he put it into a verticle climb, and it went almost out of sight in a few seconds.
Very Very Impressive.

No I am not going to pack in helis, but I could not help but be impressed.
Anybody else seen one of these fly?

[leonardo]

Hi, I found a video here
http://www.rcdon.com/html/bvm_bobcat_xl_video.html

the noise is truly amazing

[Bug]

I want one

[Ade_Law]

150mph? bah thats slow... i have done that without a motor! (clocked on radar) the record gliders in "dynamic soaring" stands at just over 300mph...

http://www.slopeaddiction.com/user/K...te; TOP: 699px

something like a weston uk magnum will top 200 with a glow motor...

Ade

[kevinh]

Hi all,
Went to our club meet last night,
What a night, perfect flying conditions, flew six packs in total on the Twister 3D and the Mimi Titan. even managed to get a little video, all I have to do now is work out how to upload it to share with all.
To top off the night, one of the club members, (and shop owner) bought along his latest toy,
It wasnt a Heli, but this was no ordinary plane, this was a Jet, I believe it is called a bobcat, had a small jet motor, and he did a quick demo flight, and when I say quick, I mean QUICK. the sound was awsome, and at about 150mph very very fast. he put it into a verticle climb, and it went almost out of sight in a few seconds.
Very Very Impressive.

No I am not going to pack in helis, but I could not help but be impressed.
Anybody else seen one of these fly?

was that a higham??????

[jamiesawyer28041978]

150mph? bah thats slow... i have done that without a motor! (clocked on radar) the record gliders in "dynamic soaring" stands at just over 300mph...

http://www.slopeaddiction.com/user/K...te; TOP: 699px

something like a weston uk magnum will top 200 with a glow motor...

Ade

How do the gliders go so fast in that vid ade , can hardly see it its going that fast . Ive heard of dinamic soaring before but never understood it realy. The wing must be built up around carbon to be so strong.

[LipolyGone]

It's magic jamie theres a big hand pushing them around but it's invisible
Brings back a few memories there Ade havent been out to whumpcrump in a long while.

[jamiesawyer28041978]

It's magic jamie theres a big hand pushing them around but it's invisible
Brings back a few memories there Ade havent been out to whumpcrump in a long while.

Maybe im thick , it was a serious question but this is a heli sit not gliders so maybe im barking up the wrong tree.

[LipolyGone]

Ade is well versed in all forms of flying mate as I am but no where near as good as him. Dont tell him I said that tho shhhhhhhhh
DS'ing is quite simple realy you need a very sharp ridge that is steep on both the front & the back side. air coming over the top is lifting, air going down the back is either not moving i.e still & no resistance or falling. What you need to do is launch off the front, wind facing face & gain altitude you then dive the model down the back side through the air that is falling this speeds the model up. at the bottom you make as smooth an arced turn s you can & fly back up the slope & over the top into the air which is lifting this speeds the model up again. the longer you can keep this going the faster the model will go untill either A the model blows apart or B you get it wrong & the model slows down.
It's a very loose anology of what happens in dsing & there are better people who will give a more detailed account out there than I.

[jamiesawyer28041978]

Thanks new you were taking the pi.. , but you did have me going at one point

[Kwickkwack]

was that a higham??????

No Kev it was at the Monthly meet at Nayland, if you have the newsletter the dates are in there. I think this was a one off, as usually its silent flight only, so no IC. but i can assure you it was AWESOME
Pop into A1, Little Dave is the owner of it and pilot on the night

[kevinh]

He was telling me the last time i was in there( big dave) that higham was allowing turbines over higham

[warboysastro]

I have a Wren MW54 autostart turbine... just finishing off a model to fly it in. Even ground running this thing, it's awesome. Sounds fantastic, and smells just like the real thing.

Cheers - Rob

[moyesboy]

To dynamic soar only the difference in horizontal wind speed is required (no lift or sink).
With an RC glider it is necessary to gain ridge lift on the upwind side in order to dive into the lee side and begin exploiting the wind difference by diving into the nill or reverse flow in the lee of the ridge, and then popping up into the high speed air flow and pulling a high g turn to accelerate downwind. Basically you use the wind to help accelerate downwind, and then use the rotor/wind shadow to sneak back upwind with less wind resistance.
Each cycle the glider gets a boost of speed, in good conditions a much bigger boost than gravity normally supplies – so it is possible to get going much faster than the normal vertical dive terminal velocity. The sink on the lee side takes some energy out, so a sharp edge is required to make the flow detatch or reverse on the lee side to give maximum wind shear and a big dead air zone in the lee.
With a very good throw it is possible to DS a zagi behind a hedge in a flat field (I’ve seen it done!). Eventually you end up with the glider crashed into the hedge where it is difficult to reach.
Albatrosses fly for days at sea without flapping by DSing behind the waves. They are the true masters of this technique.
Big sailplanes have managed to DS occasionally when they have found a suitably defined wind shear at altitude. Somehow they haven’t had the bottle to try this looping close to a lee slope yet!

Aides film – well it seems to show that DSing is so dangerous that these two guys can’t find a third guy to hold the camera! – but I’m sure in reality there is merely a large collection of small and cheap models being thrown from top right to crash out of shot bottom left.