RCMF Donations

Enjoy using RCMF? How about a wee donation to help us keep you in the style to which you've become accustomed?

Welcome to RCMF. Please login or sign up.

July 16, 2020, 17:26:44 pm

Login with username, password and session length

Midland Slopers!

Started by Zim, August 31, 2009, 12:08:53 pm

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.

Gumball

Only 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!  ;D 
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! 
Comfortably numb......

TheRCPilotGuy

Quote from: Spoons on February 23, 2011, 19:27:44 pm
Francis there not too good.
Last time we used Simons I basically had to hit him with the model to get a reading.
J


Hahaha. Do you know of any good ones?

TheRCPilotGuy

Quote from: Gumball on February 23, 2011, 19:31:49 pm
Only 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!  ;D 
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!


Thanks! 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.

Gumball

Quote from: FrancisHarris on February 23, 2011, 19:35:16 pm
Thanks! 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.


Slope 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.
Comfortably numb......

TheRCPilotGuy

Quote from: Gumball on February 23, 2011, 19:41:54 pm
Slope 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.


400mph is almost as fast as a commercial jet, wow! I aways do low passes, and wonder how fast my glider is going :) Thanks for the info.

Gumball

Comfortably numb......

satinet

It 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 :)

Zim

Ooh 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

TheRCPilotGuy

Quote from: satinet on February 23, 2011, 21:44:51 pm
It 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 :)


I 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.

TheRCPilotGuy

Quote from: Zim on February 23, 2011, 23:13:25 pm
...


Thanks for that explanation. 130mph is very fast, and the noise they make is amazing at those speeds!

Zim

You should hear the noise a moulded DS model makes over 250mph mate! It's like THUNDER!

Z

satinet

Quote from: FrancisHarris on February 23, 2011, 23:28:51 pm
I 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.


I dunno mate, the joiner isn't that big on the typhoon is it.

TheRCPilotGuy

Quote from: satinet on February 24, 2011, 09:04:31 am
I dunno mate, the joiner isn't that big on the typhoon is it.


The joiner looks quite big, but the joiner on the Vampire is almost double the size :)

Zim

Hey Francis

The 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

TheRCPilotGuy

Quote from: Zim on February 24, 2011, 17:53:40 pm
Hey Francis

The 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


Thanks for that! I never really push my Typhoon that hard, especially on really windy days :)

Anthony

Just got back from the Mermaid.....great afternoon..... :af. Ant.

compact

I have had a bushnell gun for a few years now, I stopped using it caus to get a reading you have to fly straight at the gun, dangerous infact no one would stand next to me and webby, as for speed front side well 120mph - 140mph is regular, ive had a 167mph dive and webby a 158mph run, my telemetry was reading dives of 130mph+ with the opus the other day. But if you want to gun me with the bushnell to see how fast we goin that would be great, I guess you would only be happy doing the once though, 120-150 two foot away is cool.
Scott

feefo

Strap a video camera on the gun then, could be fun when it's the D40..... :ev
Ok, this isn't funny, who's moved my sense of humour?

Anthony

Ayup........some threads have gone missing.....mine dosen't make any sense now... $%&. Ant.

compact

Anyone flying Leek slopes this weekend.............

Scott r :uk:

Anthony

Sat'....rain, Sun'....sushine with a good blow NWesterly...that'll be the Gate then Scott.  :af.

compact

Sunday it is then..........

feefo

Quote from: compact on February 25, 2011, 10:23:46 am
Anyone flying Leek slopes this weekend.............

Scott r :uk:


Hope so. Forecast was originally both sat and sun good, I was hoping to get up both days. See what happens, weather might change again.

Scott, will Webby be up? Got some £££ burning a hole in my pocket for him. Do you know if he's had chance to do a tray?
Ok, this isn't funny, who's moved my sense of humour?

compact

Im sure the webmeister will be out, although if it goes north sunday, will be on another slope.

Gumball

Can't make it this weekend chaps as I'm moving out of the family home. As from Sunday I'll be as good as single again after 27 long years, Yeee- Haaaw!!  :D
I'll miss a days flying, but it's worth it!  :co
Comfortably numb......

compact

Im on my second one and im sure this one is still faulty.....

feefo

Quote from: compact on February 25, 2011, 18:22:01 pm
Im sure the webmeister will be out, although if it goes north sunday, will be on another slope.



I'm not going the bloody Cloud. Still got the crutches in the car.
Ok, this isn't funny, who's moved my sense of humour?

feefo

Can only fly every other Sat, Mrs works so I've got my son. Tried taking him to Leek once, never again. Going have to get down to the Mynd again, don't feel like I've had my money's worth...... :D
Ok, this isn't funny, who's moved my sense of humour?

Gumball

It's looking good for Sunday at Elkstone, but as the winds are light I guess it's time to dust off the Speedo and W'evo.
Hmm, I might even put the new Blaze in the car too, just for you Feefo. Panic attacks a go- go!!   :ev
Comfortably numb......

feefo

I didn't think there was enough S to go to Elkstone, thought the Roaches would work better $%&.
Ok, this isn't funny, who's moved my sense of humour?

compact

The roaches are NE, they dont fly SE, elkstone is E and doesnt work well as it goes of east, We havnt got a SE site, You have to go out the other side of leek , but I cant remember the name of the slope though

Anthony

Weaver Hills is the SE sight, off the Ashbourne road.  :af. Ant.

compact

Quote from: Anthony on March 06, 2011, 11:46:07 am
Weaver Hills is the SE sight, off the Ashbourne road.  :af. Ant.

Thats the one, Cheers Ant

richylad

Quote from: Zim on February 23, 2011, 23:13:25 pm
Ooh 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


just noticed this on Ebay, may be of interest to someone

http://cgi.ebay.co.uk/Stalker-Sport-Radar-Gun-Dynamic-Soaring-Glider-/110659517872?pt=UK_ToysGames_RadioControlled_JN&hash=item19c3d23db0

If it goes up, it comes down, typically faster than expected

compact

So who's flying Leek Sunday..............

feefo

Ok, this isn't funny, who's moved my sense of humour?

Astro

Had a nice few hours at pole cott today ,light winds and realy warm up there.
saggita went up okay and was great just to have it on the face finding lift.
mini ellips realy good fun although started glitching (must check).maybe should have taken the Stratos (not flown that yet )
Dave

wdeighton

Anybody going to rushup tomorrow?

Anthony


wdeighton

Quote from: wdeighton on May 07, 2011, 23:31:39 pm
Anybody going to rushup tomorrow?

gutted I am not up today. (lads 2nd bday today with party and all.)
g called ans said the drive is brilliant, and correct man and model and make records crumble today.
And hardly any one there. only 2 at the time. and not that many walkers.

hey ho.