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Author Topic: 10' rok tensioning question  (Read 2190 times)
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sanleonkid
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« on: July 04, 2017, 06:13 AM »

looking at photo, what suggestion would you "experts" out there make to take the extensive bow out of the kite?  longer spars?  stronger spars?  lower winds? adding stronger spar in middle of current?

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Charles G
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« Reply #1 on: July 04, 2017, 06:36 AM »

I would raise the tow point on the bridle, or fly it in lighter wind.
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tcope
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« Reply #2 on: July 04, 2017, 08:17 AM »

Could be almost anything. Stronger wind is going to cause bowing. Stronger spars can counter this. You might also have more manual bow set in the kite, don't really know. A higher angle of attack would probably relieve some stress but this tends to make the Roc a little more flakey.

A Roc does need to have some bow to remain more stable, more in the lower spreader. The upper part of the kite controls lift. From the photo, the bowing does not seem too excessive.
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Todd Copeland
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ezme6
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« Reply #3 on: July 04, 2017, 08:22 AM »

i often change the amount of bow. High winds more bow, light winds less. Tow point adjustment too. High winds move up, low winds move down
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sanleonkid
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« Reply #4 on: July 04, 2017, 09:09 AM »

since the rok  has 4 point bridle was thinking extending spars as the material
seems to "fold over" the spars in the middle  especially along the face

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tcope
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« Reply #5 on: July 04, 2017, 09:17 AM »

I'm not sure what that means... but if you change the cross spars, you need to do this to both the left and right side, not just one side and then move the spar. That is, the same amount of sections and connectors need to be on each side of the center. Otherwise your Roc turns into a propeller.
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Todd Copeland
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sanleonkid
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« Reply #6 on: July 04, 2017, 12:02 PM »

I'm really thinking the cross spars are not long enough to tighten the skin ACROSS them?HuhHuh  maybe?
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KaoS
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« Reply #7 on: July 04, 2017, 05:13 PM »

I would raise the tow point on the bridle, or fly it in lighter wind.

Totally agree.  The cupping of the centre panels is due to direct wind pressure.  You can reduce this by raising the tow point.  This results in the wind acting on the sail at an angle, rather than "front on"
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Kevin Sanders

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« Reply #8 on: July 04, 2017, 06:11 PM »

Just bridling..... No frame issue! Great kite to have!!!fly him a lot!!!
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Kites kayaks & corgis again!!!
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