159 replies to this topic

[clare]

I would guesstimate that daves (red and black) had the least surface area - by eye, but of course the pattern of holes may be deceptive.

Dave will probably be able to be more help on this subject with his technical mind and what not!

[dave b]

They look fantastic. Have you calculated the surface area of hole on either of those two EXP's (Pi R squared) and if so which has the biggest surface area of whole? Did you notice any difference in performance with the different hole configuration?

Hi Stephen,

Just done a quick check on the surface area of holes on my EXP (red/black) & it works out at 13230 square millimeters or 521 square inches for you imperial people.

Don't know about brians, will have to check size & number of holes. Regards difference in performance we didnt get chance to try each others kite. There was a large difference in the bow on the leading edge as brian had SLE spars & I had the EXP spars.

Great fun being able to fly in such high winds if you dont mind being sand blasted in the process

Dave.

[Stone in Shoe Bob]

which has the biggest surface area of whole?

Physics or philosophy? Does a hole have a surface? And If not, how can it be measured?

[Stone in Shoe Bob]

Alternatively :-
How many beans make five?
Why does a frog when it hops?
And How can a horse do that and carry on walking?

[Stone in Shoe Bob]

Daves haveing fun,isnt he.Hes Peeling an Orange in
his pocket,for ME.I bet the nights fly by in your house my freind.
SMILE DAVE.
jUST A FEW MORE.Roll on summer

BRIAN....

Confucius, he say, “Man with hole in pocket, feel cocky all day.”

[big bri]

YE Bob,suddenly the smart set havent any guesstimates by eye .
Whats that,
guestimate by eye.Some Sub Imperial measureing system from mr Abacus.

Some more Noticeble Findings haveing now flown the Kite.These are experienced findings and not a best guess.

STD Exp sprs in Daves kite probably gave less control.With the Bow in the L/E,it was on the edge of its upper stress level.I had the SLE in my L/E.Found that control and any more agressive moves,idnt give the impression the kite was in the Upper stress limits.Though Dave said his would be and was cautious in Dive Stops and Snap Turrns.With wind measureing over 5 on the B/F/S.They performed very well.The highest i flew in was 44mph ,with a constant 40mph.

I will do as Stephen Suggested and make my Holes even Larger.The Centre of the sail.Where the REV sign is.Deffinately needs some Venting.The pull was very noticeable from that area,as ther arent any holes ATM in the area.
The pull was moderate and managable on the kite.I would say like a normal 1.5 vented in or around a good 18mph wind or slightly above.I flew on 150lb x 90ft LPG.I was very confident with this as a choice and would even have used a lower Breaking Strain.I would also have liked to have tried longer lines myself,but didnt.Dave did and i think he used 110lb X 120ft climax protec.Without a problem or certainly a noticeable one.

Ther isnt any Noticeable wear and tear ATM,but i will monitor this as the Down Spars in conjunction with the flying surface and conditions,must cause a sanding affect on the contact points around the Verticles.The sail may suffer if some precautions to stop wear at these points is taken.A rub patch of some kind would be prudent i think.

Another noticeable point was the stress on the Bungies and how much more they stretched[see the picture].Because of the stretch.The sail and the venting tended to Bunch or ride up the Verticles toward the L/E.This also distorted the sail patern,or the holes[venting] became miss-shaped and prevented even venting.I wondered if the Bungies could be replaced with a more measured or even rigid fix that would maintain a constant sail patern and would also maintain the venting shapes and in theory give a more constant,even vented surface.

I do fear that the sail,particularly the Venting[holes] if not sealed properly will definately tear or fray.The conditions or the extremety of conditions i think will cause wear and then fraying if something cant be done as a prevention.The only idea i can think of as a prevention is re-seal the holes as soon as any wear is noticed,useing the method used on the L/E when fraying starts[heat sealing].

Hope this is of use to someone.Its FUN flying in these conditions and gives you a real buzz and enables you to play when others are grounded......,BUT,One major diffrence that must be given respect is SAFETY.Setting up is a NEW ball game in 40mph winds,as one of the guys i flew with today found.He almost lost a finger[no harm realy]and notted a set of good lines into a nice ball or BIRDS NEST that will take some hours to sort out .
THINK BEFORE you do anything with your DIGITS,especially when the line is attached to the KITE.

BRIAN...ps,
If ya dont know the answer,ask.Guessing by EYE isnt telling something we dont already know unless your Stevie Wonder[no Offence Stevie] .

[Watty]

Confucius, he say, “Man with hole in pocket, feel cocky all day.”

HAHAHAHAHAHAHAHAHA!!!!!!!!!!!!!

[Harrier]

Good pics Bri, pity about those motors getting sand blasted though
On two of my Rev types which are flown in higher winds I fitted 4mm bungees, at the bottom of the uprights (verticals) it is passed through 4mm nylon washers to spread the load on the back of the sail.
The 4mm shock cord stopped a lot of the sail bunching you mentioned.
http://cgi.ebay.co.u...1QQcmdZViewItem

[big bri]

Now ive stopped laughing at Bobs Joke,Ican say, Thanks Harrier.This could do the trick on the sail bunching.I will purchase some and see what happens.Thinking of putting some Moonie tape along the area wher the verticals rub the sail.I would do both sail and spar with the tape i think

pickys of the
Mega Vented MK2,,,,

g]

[play365]

Now ive stopped laughing at Bobs Joke,Ican say, Thanks Harrier.This could do the trick on the sail bunching.I will purchase some and see what happens.Thinking of putting some Moonie tape along the area wher the verticals rub the sail.I would do both sail and spar with the tape i think

pickys of the
Mega Vented MK2,,,,

I do hope those rev shapes dont rip ?

[big bri]

Ye Gary,OOPS, Sir Garyor Mr Gary,i know what ya mean.I thought if the slightest sign of a tear or a wrip happens.I would turn the shape into a box/strip .Then mesh the area with,well, with Mesh


BRIAN...

[play365]

Ye Gary,OOPS, Sir Garyor Mr Gary,i know what ya mean.I thought if the slightest sign of a tear or a wrip happens.I would turn the shape into a box/strip .Then mesh the area with,well, with Mesh


BRIAN...

I used to have a vented kite with velcro mesh panels ...worked quit well in a bit of a blow, Woody and I have triple vented + teabags for when it's really windy but Stephens holy kite works v well

[big bri]

A Variable Vented Panel had crossed my mind.Though of useing some mylar with velcro onit.I will fly this first...


BRIAN...

[Choccy]

Ummmm now where have I seen this English Tea-l-bag before (?)

"Fancy a cuppa".... "don't mind if I do"
There's not much else to do in these strong winds when you are funsized
(I'll just sit this one out when the winds too strong)

I would still need a mega-mega-vented, even in wind no where near 40mph!

Very nice "Chimp".

[cerfvoliste]

Ah yes.. we had a visitation at KP6 this year.
Rx

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[KYT ADIK]

awww man... those are just too cool........every time i look at this thread makes me want one.....

[Choccy]

Nice "Chimp" on a gusty day

[Edit: pic deleted. RIP]

[big bri]

ALIVE & KICKIN


BRIAN...

[Sailor99]

ALIVE & KICKIN

Very much so!

[Choccy]

ALIVE & KICKIN

It's looking well Bri considering the conditions it has been put through!