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Old Nov 15, 2012, 04:53 PM
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Australia, VIC, Melbourne
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Disho, I would expect your T-45 must go over 100mph. My 5S Meteor does 160kph (100mph) and the BL32 is a more powerful motor than mine... and also a high KV for 6S.
T-45's are a little bit more draggy, whilst the Meteor/Habu is very slick, but that motor/6S should offset that.
I would think even 120mph really.

I have an alloy CS10 2200kv I was going to use on 6S in it, but now that I have seen the T-45 I will just use a 5S 'plastic' CS10 setup. It is not worth using the alloy setup in it.
Hmmm, I will swap the Meteor CS10 into the T-45 and use the alloy in the Meteor.
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Old Nov 15, 2012, 04:57 PM
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Italia, Puglia, Porto Cesareo
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Help!!! center of gravity?

Quote:
Originally Posted by disho View Post
...
I have a big problem.
my plane does not have the rear air intake.
how do I calculate the center of gravity?
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Old Nov 15, 2012, 05:46 PM
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United Kingdom, England, Durham
Joined Apr 2011
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Quote:
Originally Posted by PeterVRC View Post
Disho, I would expect your T-45 must go over 100mph. My 5S Meteor does 160kph (100mph) and the BL32 is a more powerful motor than mine... and also a high KV for 6S.
T-45's are a little bit more draggy, whilst the Meteor/Habu is very slick, but that motor/6S should offset that.
I would think even 120mph really.

I have an alloy CS10 2200kv I was going to use on 6S in it, but now that I have seen the T-45 I will just use a 5S 'plastic' CS10 setup. It is not worth using the alloy setup in it.
Hmmm, I will swap the Meteor CS10 into the T-45 and use the alloy in the Meteor.
Sounds like a good idea, i have the alloy 10 blade in my hunter, but the t45 still sounds the best
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Old Nov 15, 2012, 05:48 PM
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United Kingdom, England, Durham
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Quote:
Originally Posted by Matty001 View Post
I have a big problem.
my plane does not have the rear air intake.
how do I calculate the center of gravity?
What rear intake?? i posted cg a couple of pages back
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Old Nov 15, 2012, 08:04 PM
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Could someone who has modded there T-45 from 64mm to 70mm give me some insight on the best method to do this. Pics would be great Thanks
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Old Nov 15, 2012, 08:13 PM
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USA, MD, Frederick
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I took a spare 70mm duct and used a hobbyknife to bevel the inside of the rim to form a "cookie cutter" edge and worked it in place using a lot of twisting.
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Old Nov 15, 2012, 08:14 PM
JOHN 3:16
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Central Ohio
Joined Feb 2008
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One method is to glue a section of sand paper around a small can (like a small spray paint can) and use that to enlarge the fan area.
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Old Nov 15, 2012, 08:44 PM
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Australia, VIC, Melbourne
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I will Dremel drum sand it out. And it also needs "blending" at the front end into the fan. No lip on the fan in this installation.
Exhaust...... not sure until I test it but it looks a bit small at the fan end also.

Another way is a large piece of dowel with sandpaper glued to it. So it is long and you can get it deep into a plane. The larger the diameter, the more accurate your 'rounding' out will be.
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Old Nov 15, 2012, 11:51 PM
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Also, any tips on removing the stock 64mm fan without too much carnage???
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Old Nov 16, 2012, 12:22 AM
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My kit doesn't have a fan, but they are usually either hot glued in, or taped.
So you can just pry them out by hand... rock it end to end. Once you get it going it gets easier.
Some people use a hair dryer and heat it a BIT.... but you have to be careful of expanding the foam if you use heat. I have always got them out just by the "careful force" method.
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Old Nov 16, 2012, 05:03 AM
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Adelaide, Australia
Joined Apr 2004
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At long last, I found the time to upload Jim350's maiden flight of his BAE Hawk fitted with the changesun 70mm 10 blade EDF unit. This unit was a balanced unit purchased from extreme rc here in Oz.
Jim350's foamie BAE Hawk 10 blader (4 min 25 sec)


.
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Old Nov 16, 2012, 06:24 AM
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Woohoo

Ahh that sounds so nice :-) thanks Nitro
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Old Nov 16, 2012, 01:25 PM
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Quote:
Originally Posted by Komm_Klink View Post
Could someone who has modded there T-45 from 64mm to 70mm give me some insight on the best method to do this. Pics would be great Thanks
Hi it took alot of work with the dremel to get the fan in, i split the rear fuss in half to make it easer to work on, then i used silicon to seal the fan in, i tryed it without a nasa duct first in my other vid it felt starved of air, its now awesome with a duct cut just infront of the fan thxs
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Old Nov 16, 2012, 01:40 PM
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Quote:
Originally Posted by NitroCharged View Post
At long last, I found the time to upload Jim350's maiden flight of his BAE Hawk fitted with the changesun 70mm 10 blade EDF unit. This unit was a balanced unit purchased from extreme rc here in Oz.
http://www.youtube.com/watch?v=QTKENJ2fYj4

.
Nice but for it just don't sound as good as disho one and it looks slower too
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Old Nov 16, 2012, 02:00 PM
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Well, he doesn't say what was the cell-count of the battery he used ...
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