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Old Jun 03, 2011, 06:56 AM
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wparsons's Avatar
Canada, ON, Markham
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It's the esc that's the weak point, you should be fine with a 180a since you're already monitoring temps.

Did you try running it with the prop flat, but with the bottom of the hub raised about 1/8" above the bottom of the sponsons?
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Old Jun 03, 2011, 08:57 AM
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Drammen rock city. Norway
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Just back from the water, but to many folks taking a swim, and windy , so the boat was only jumping arround , and fliped, so I will take a trip later tonight if it's calmer.
Do you have a picture to go with you're question wparsons ?.Not sure I got it.
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Old Jun 03, 2011, 02:44 PM
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If you look at the boat from the side (or set it on a table) have the bottom of the strut parallel to the bottom of the sponsons and raised up so the bottom of it is about 1/8" above the bottom of the sponsons.
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Old Jun 03, 2011, 04:32 PM
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Drammen rock city. Norway
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Here is how I have mine with the prather 215. I Just got back after 2 5s runs, and its so much fun. But the small move of rudder had nothing to say, still bouncing with packs up front/midle/hangin of back. I was fooled by the small curves on the water last night, when I said the bounc was gone.

Quess the kintec rudder wil be here soon anyway.

strut test (0 min 37 sec)
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Old Jun 03, 2011, 08:27 PM
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See if you can raise the prop about 1/8" straight up and see how it runs.
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Old Jun 04, 2011, 02:56 AM
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Newcastle, Australia
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My offset and new rudder arrive. It's fitted and I'll be testing it in the morning. The rudder is a little larger than I imagined but i've seen footage from some of the 80mph 90mph versions of these boats and they appear to be using a similar size rudder and yes they are all offset.
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Old Jun 04, 2011, 03:18 AM
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Drammen rock city. Norway
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Quote:
Originally Posted by wparsons View Post
See if you can raise the prop about 1/8" straight up and see how it runs.
Keep the 'green' area as it is ? And just try to raise the strut (red area) up ?

1/8 inch, that's about 0.3 centimeters ore so, that's not pritty much :-)

As I tried to show in the video, I think it's pritty stiff so it's hard to adjust the strut without moving the whole thing up ore down.

Also how would you place the lipos then ? center on tray, hung over edge ore up front?
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Old Jun 04, 2011, 05:22 AM
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The stuffing tube (green area) will have to bend up a bit for the strut to be raised, might not need a permanent bend, but it will change the arc of it so you might need a helper or a space block to hold it in place until you get the strut bolts tight.

1/8" is roughly 3mm, it's actually 3.17mm but I know I can't see the difference between the two with my eyes

Put the batteries where they worked best before, it's not smart to make more than one change at a time or you'll never know what actually helped.
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Old Jun 04, 2011, 07:33 AM
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Rusty you can cut the rudder about a half inch and it would work the same with less drag .
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Old Jun 04, 2011, 08:44 AM
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Rusty Old Fart's Avatar
Newcastle, Australia
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Quote:
Originally Posted by mavdriver View Post
Rusty you can cut the rudder about a half inch and it would work the same with less drag .
Yer I know, but i'll wait to get the bounce sorted first then think about it

Cheerz
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Old Jun 05, 2011, 04:25 AM
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Newcastle, Australia
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Interesting. In this video the apparition starts porpoising and he mentions lowering the strut. He lowers the strut twice and boat begins to run smooth.

HobbyKing - Apparition offshore Brushless Twin-Hull RC Boat (13 min 26 sec)
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Old Jun 05, 2011, 05:31 AM
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Drammen rock city. Norway
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nice, will have a look at it later today. And to Airplanekid. Sorry for taken the tread, I just now looked at first post's and saw it was you're tread. I thought it was the 'ordinary' geico tread from when it came out.
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Old Jun 05, 2011, 08:56 AM
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Canada, ON, Markham
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Rusty, where does he actually lower the strut? He brings it in to check temps, then throws 6s in it, shreds the prop, and swaps to a 35mm metal prop.

Going to a smaller prop has a similar effect to raising the prop since it is lifting the transom less.
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Old Jun 05, 2011, 09:51 AM
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scorpion1's Avatar
Southern U.S.
Joined Jun 2008
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Quote:
Originally Posted by Rusty Old Fart View Post
Interesting. In this video the apparition starts porpoising and he mentions lowering the strut. He lowers the strut twice and boat begins to run smooth.

http://www.youtube.com/watch?v=TygZu...feature=digest
He does state lowering it a tad..............

I always thought this motor(1620kv 3660) could handle 6s and it did ok, hit 50. His temps were a bit high for my liking at 145* on the motor running 6s, and thats after he fished it out and it had a chance to cool slightly i would imagine. However, if he were running in a large body of water he wouldnt have had to get on and get off the throttle constantly which would lead to better temps.
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Old Jun 05, 2011, 03:33 PM
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^^ He mentions he might try lowering it, but never actually shows it or says he did it.
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