Started by Zim, August 31, 2009, 12:08:53 pm
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Quote from: Spoons on February 23, 2011, 19:27:44 pmFrancis there not too good.Last time we used Simons I basically had to hit him with the model to get a reading.J
Quote from: Gumball on February 23, 2011, 19:31:49 pmOnly a bargain basement one that reads up to 200 MPH as I don't intend checking any DS models. That's far too dangerous from what I've seen! The article in question is manufactured by Bushnell, but beware if you think of buying one as the price can vary considerably and you need to be a good shot to use it successfully!
Quote from: FrancisHarris on February 23, 2011, 19:35:16 pmThanks! Can slope models get above 200mph? I read a review of it, and it says you need to get the model quite close for a reliable reading.
Quote from: Gumball on February 23, 2011, 19:41:54 pmSlope models can go over 400 MPH in the right conditions, and as I said, you need to be a good shot and have a pilot that can fly accurately. Most models have a small cross sectional area so are difficult to catch with radar, but it can (and is) done.
Quote from: satinet on February 23, 2011, 21:44:51 pmIt think you will struggle to top about 130 - 140 on a front side dive. It's probably not as fast as we think it is. I think they could probably go faster, but you would never be able to get enough height to go really fast (IMHO), as you would not be able to see it. I think the front side record is something like 240 mph in the alps?That being said when you get a big mouldie up to say 100mph the energy retention is unreal isn't it
Quote from: Zim on February 23, 2011, 23:13:25 pm...
Quote from: FrancisHarris on February 23, 2011, 23:28:51 pmI do love the energy retention when I use ballast on my Typhoon I've also wondered how much those carbon spars can take. Do you think it's safe for me to use full elevator movement pulling out of a large dive? Thanks.
Quote from: satinet on February 24, 2011, 09:04:31 amI dunno mate, the joiner isn't that big on the typhoon is it.
Quote from: Zim on February 24, 2011, 17:53:40 pmHey FrancisThe Typhoon joiner, in terms of the performance that it is capable of, does have a fairly small joiner. Certainly with full ballast, over 100mph off a dive and a hard pull, you will see a lot of flex in that joiner. Having said that, I've not heard of one breaking. The glass Typhoon has been DSed to around 125mph or so, and there was a fair bit of flex evident at that speed in the pulls.So I expect that it will take what you can throw at it, provided that you maintain at least some level of mechanical sympathy! I believe that Andy Ellison has seriously hammered his in massive air on the Great Orme, and whilst there as a fair bit of flex evident, no breakage! His was carbon, however.Zim
Quote from: compact on February 25, 2011, 10:23:46 amAnyone flying Leek slopes this weekend.............Scott r
Quote from: compact on February 25, 2011, 18:22:01 pmIm sure the webmeister will be out, although if it goes north sunday, will be on another slope.
Quote from: Anthony on March 06, 2011, 11:46:07 amWeaver Hills is the SE sight, off the Ashbourne road. . Ant.
Quote from: Zim on February 23, 2011, 23:13:25 pmOoh fun fun topic! Depends on the model and the altitude in the dive. The thing that stops most models getting faster in a dive is torsional stiffness in the wing. For example, a regular F3F will have a little bit of washout whether geometrical or aerodynamic, or both, in the wing. Take it outside of its design speed and the tips will want to lift down compared to the centre section. If the wing is not torsionally v stiff, then the wing will twist a bit, and stop the model from increasing its speed. Regular F3F models I'm gonna guess that happens around 130-150mph. When DSing them this becomes apparent when the whole outer panel of the wing wants to repeatedly start fluttering. My RaceM started getting grumpy like this around 130mph. Of course the turbulence in the shear layer is never going to help!DS models - well they are designed specifically to NOT do this and as such will continue to accelerate in a long dive. A Dynamic 60 was radared at 160mph on Lundy last year in pure frontside, and I know that Joe Manor has radared his D80 at over 250mph (270 iirc) in a dive in the US. The dive was from a punch out altitude generated by DS of well over 300mph, so it's not really a frontside speed as the altitude was generated by the DS if you see what I mean! On a good day DSing, you'll get a dive in speed into the DS circuit well in excess of 120mph with a DS model. Sometimes coming up to 150mph, and you're not even really trying to get a monster dive in speed as an end in itself really. Guns - quite a few good choices now. Sorry to say that the Bushnell is definitely not one of them! Seriously pants they are - not even really a question of aiming GB - they really are just not that good.For a budget option, the Pocket Radar actually seem pretty good, and from what guys are saying, better at picking speeds up than the Bushnell! http://pocketradar.com/ have heard that people have had good results up to 200mph with these. Good good value it seems. Really good. If you want a radar for starting out in DS then this has got to be worth a really good look just for it's value. Readings check out well with the expensive DS guns when tracking the same model apparently. Up to 200 anyway so it seems. Don't know of anyone with one of these in the UK yet though?Then you have the serious speed guns - the Falcon which will read up to 575mph, and the Stalker Pro II which will read to 800mph. Had a ProSpeed which is a great sports gun, but it starts to become difficult to acquire readings coming up to 300mph, so sold it, as we are approaching that in the UK now. Couple of chaps have the Falcon in the UK now, so I think my new gun will likely be the Stalker Pro II to try that out. These two guns are both well in excess of US$1000 unfortunately, so only for seriously committed (pun intended) DS maniacs.You going to get into a bit of DS malarky with that one GB?Z
Quote from: wdeighton on May 07, 2011, 23:31:39 pmAnybody going to rushup tomorrow?
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