SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Jan 19, 2013, 07:59 AM
Lets break some props :D
joseico90's Avatar
United Kingdom, Liverpool
Joined Jun 2008
4,970 Posts
Quote:
Originally Posted by pardshaw View Post
Jose
2.) It follows (to me, anyway) from (1) that this must be true also. The only thing I wonder about is increased drag, . This is a case of more weight being better ?

3.)Nutball obliges up to a point but will roll away the more nose up the attitude becomes.

4.) A great theoretical description of why the UB should be easier in high alpha than the NB. So much so, in fact, that I will build a UB and find out if practice fits theory! (I know you've done it already, but I'm interested to put it to the test for myself!)
2-Drag is increased of course, but that mainly affects penetration head on, in other words..like having "the hand brake on a little" while driving, I find it good that the model kind of brakes by itself when lowering the throttle, drag on my 6mm Depron one was not high or inconvenient.

3) that has been eliminated on the UB's, as long as there is prop wash flow going to the back (rudders)

4) Not theory, the videos are all there see UB 14" for example. Chris in Greece has built 2, he's just starting to fly RC planes.

The Underball flies different to a Nutball, I hope you like it.
joseico90 is offline Find More Posts by joseico90
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 19, 2013, 08:04 AM
Flying one day at a time....
pardshaw's Avatar
United Kingdom, Pardshaw
Joined Oct 2012
1,469 Posts
Dave

I didn't see your post in time (too busy writing mine!), but I can't help noticing that as far as windy conditions are concerned I think we're saying the same thing. Heavier (and bigger diameter) is better for wind.

I know you have said that several times in this thread, but to be honest (I'm a bit ashamed to say this) I thought building light would be more important for me. This is, as you have just said, entirely true for NO wind, but becomes increasingly untrue the higher the wind speed you want to fly in.

As for your elevon-Nutball (pictured in your previous post) I can now see some attractions in it. Are the blue blocks retainers for the long pushrods? Do the 4 elevon surfaces work as two pairs (if you understand what I'm asking). In other words do the two LH elevons perform exactly the same motion together?

I am seriously revising my view of weight/wingloading and now firmly believe what you have been saying all along - weight is useful in windy conditions. I've watched so many of your Nutball videos I feel I know your flying field personally. You say it is prone to eddie winds off the tower blocks. I fly in a very exposed field with significant levels of wind most of the time.

Anyway - are there any more details of your elevon Nutball - it might be a good intermediate step for me exactly as you suggest. Thanks.

Dave
pardshaw is offline Find More Posts by pardshaw
Last edited by pardshaw; Jan 19, 2013 at 08:28 AM.
Reply With Quote
Old Jan 19, 2013, 08:36 AM
Flying one day at a time....
pardshaw's Avatar
United Kingdom, Pardshaw
Joined Oct 2012
1,469 Posts
Dave

I can answer my own question - each single elevon servo drives 2 elevon surfaces on the same side, so yes, both elevon surfaces on the LH side act together (as if they were one).

I'm just a bit slow on the uptake is all......

Dave
pardshaw is offline Find More Posts by pardshaw
Reply With Quote
Old Jan 19, 2013, 08:40 AM
Lets break some props :D
joseico90's Avatar
United Kingdom, Liverpool
Joined Jun 2008
4,970 Posts
JetBall ready,

-AUW = 354 GRAMS
(with a 1300 3s batt)
Wish me luck, gonna fly this puppy..
joseico90 is offline Find More Posts by joseico90
Reply With Quote
Old Jan 19, 2013, 08:45 AM
Flying one day at a time....
pardshaw's Avatar
United Kingdom, Pardshaw
Joined Oct 2012
1,469 Posts
Jose

GOOD LUCK, my friend. I hope it all goes well with the JB.

By the way, I wasn't being in any way critical when I used the word "theory" - just the opposite in fact! I think UB is a great idea!

I also like Dave Reap's elevon NB because it has no disadvantages and will teach me right-thumb rudder control on a design (in fact the ONLY design) I'm familiar with. May have to try both !!!!!

AND GOOD LUCK (again) !!

Dave
pardshaw is offline Find More Posts by pardshaw
Reply With Quote
Old Jan 19, 2013, 08:58 AM
Lets break some props :D
joseico90's Avatar
United Kingdom, Liverpool
Joined Jun 2008
4,970 Posts
I know, don't worry!
joseico90 is offline Find More Posts by joseico90
Reply With Quote
Old Jan 19, 2013, 09:54 AM
Lets break some props :D
joseico90's Avatar
United Kingdom, Liverpool
Joined Jun 2008
4,970 Posts
Fast, very, very fast!

I honestly can say..

I did not think it was going to be this fast!!

It's almost mind blowingly fast!

Never seen a Nutball this fast my friends..

Videos uploading.

Oh ...and the sound!
joseico90 is offline Find More Posts by joseico90
Reply With Quote
Old Jan 19, 2013, 10:17 AM
Registered User
Canada, ON, London
Joined May 2011
1,738 Posts
Quote:
Originally Posted by goldguy View Post
We have a Cobble Hill just down the road.........

I live 6 minutes from one of the best 'over the water' slope sites on the west coast. I'm a slope flying addict and check the wind forcast ten times a day on the net, even though I know there's no wind in the near future. We even went flying at 10:30 PM on Xmas eve.
Cool.... on both points . I used to live in Aldergrove back in highschool. Went back a year or two ago with my kids and wow what developments! I left there in the summer of '86 so there was a lot of change! Always loved it out west. Now I really miss the mountains ;-)

Cheers,
J
uberjay is offline Find More Posts by uberjay
Reply With Quote
Old Jan 19, 2013, 10:18 AM
Registered User
Canada, ON, London
Joined May 2011
1,738 Posts
Quote:
Originally Posted by joseico90 View Post
I honestly can say..

I did not think it was going to be this fast!!

It's almost mind blowingly fast!

Never seen a Nutball this fast my friends..

Videos uploading.

Oh ...and the sound!
Can't wait!
uberjay is offline Find More Posts by uberjay
Reply With Quote
Old Jan 19, 2013, 10:28 AM
Flying one day at a time....
pardshaw's Avatar
United Kingdom, Pardshaw
Joined Oct 2012
1,469 Posts
Yup

Can't wait!
pardshaw is offline Find More Posts by pardshaw
Reply With Quote
Old Jan 19, 2013, 10:45 AM
Registered User
Terry Rigden's Avatar
UK, Bedworth
Joined Apr 2004
2,822 Posts
I still believe that extra weight is only is only useful in steam rollers and boat anchors. Drag is your real enemy. I've flown light slope soarers in high winds you do need powerful controls and the right trim. At the extreme I've flown a 14" 16 gram power model in 12mph wind Ok I had to keep it into wind and landed backwards but I did it. My every day model weighs 300 grams and I've flown that when the WOT 4 brigade were shaking their heads saying it was too windy.

Terry

Terry
Terry Rigden is online now Find More Posts by Terry Rigden
Reply With Quote
Old Jan 19, 2013, 11:25 AM
Lets break some props :D
joseico90's Avatar
United Kingdom, Liverpool
Joined Jun 2008
4,970 Posts
Maiden of The JetBall

Quote:
Originally Posted by uberjay View Post
Can't wait!
Quote:
Originally Posted by pardshaw View Post
Yup

Can't wait!
Wait no more! This is the first (maiden) flight.

another clip coming up later..

JetBall, the maiden flight. (6 min 0 sec)
joseico90 is offline Find More Posts by joseico90
Reply With Quote
Old Jan 19, 2013, 11:28 AM
flyin' fool
goldguy's Avatar
Vancouver Island, Canada
Joined Jul 2003
7,384 Posts
Regarding all this talk about 'rocking', it should be noted that too much side area in front of the CG can cause strange effects. I've noted that some have profile canopies too far forward.

If you go back to the beginning, you'll note the addition of the canopy/hand launch handle was placed accordingly, since this area has an effect on the rudder's input.
goldguy is offline Find More Posts by goldguy
RCG Plus Member
Last edited by goldguy; Jan 19, 2013 at 11:35 AM.
Reply With Quote
Old Jan 19, 2013, 11:45 AM
Registered User
Chester, UK
Joined May 2010
461 Posts
Quote:
Originally Posted by joseico90 View Post
Wait no more! This is the first (maiden) flight.

another clip coming up later..

http://www.youtube.com/watch?v=exLPB...ature=youtu.be
Of course the dog won't touch it ! you nearly fell for that one Jose.......

Well done, great,I think you might need a little more power though .!!!!!!!

Graham
geedee is online now Find More Posts by geedee
Reply With Quote
Old Jan 19, 2013, 12:30 PM
Lets break some props :D
joseico90's Avatar
United Kingdom, Liverpool
Joined Jun 2008
4,970 Posts
JetBall, second flight

Two of my neighbors saw me and the park, and turned out a nice little "social" event, how nice..

The 5 deg down thrust of the fan is really necessary for high speed with this flattie.

On the second flight I opened the throttle too much and the model dived on launch due to that.

I'm amazed at the brute power out of this inexpensive edf unit

Even though...

there is not thrust cone added to the EDF,

and the model could be more streamlined.... and the fan blowing in mid wing...

this is way more I expected, honestly.

JetBall second flight (4 min 6 sec)
joseico90 is offline Find More Posts by joseico90
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Question What is THE best free plan foamy? 3Dude 3D Flying 27 Oct 13, 2009 11:48 PM
Best R/C Day yet! R/C~Mev Electric Sailplanes 3 Nov 22, 2004 11:35 PM
Best Simulator for Foamy 3D Flying ? knut 3D Flying 10 Nov 02, 2004 01:51 PM
Best AXI for Foamy Factory 44" Extra? Doug Cronkhite 3D Flying 10 Mar 16, 2004 12:11 PM
Q: Best covering for foamy scale warbird? dimple Foamies (Kits) 4 Feb 05, 2003 07:14 AM