Recent Posts

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1
For Sale and Wanted / Hacker Q80 Wanted
« Last Post by TomLaird on Today at 01:54:17 AM »
Hi,
I am debating my next bit of spending and would be interested to hear from anyone who has a Q80-11S for sale, and how much you are asking.
thanks & best regards
Tom

2
Competition News / Re: Aerobatic Bordeaux Cup 2018
« Last Post by Adrian Harrison on Yesterday at 10:11:47 AM »
Interestingly this has now been reduced to 3 x P19 rounds and 1 x F19 for the top 20.
Presumably to accommodate 50 competitors (increase of 10 from 2017)
A less attractive event bearing in mind the distances involved and the fact that the Euros start a couple of weeks later.
Adrian
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Competition News / Aerobatic Bordeaux Cup 2018
« Last Post by Matt Hoyland on 19, November 2017, 08:31:07 PM »
 Hello
The ABC contest will take place on 6.7.8 July
Registrations are open please follow the link http://abc.f3a.fr/entry-form/
Thanks see you soon
The ABC team
4

Sorry for the delay


Results attached.


Ashley
5
General Aeromodelling / News from the BMFA AGM
« Last Post by Peter Jenkins on 19, November 2017, 12:04:39 AM »
If you have not already seen this post from Andy Symons of the BMFA you might want to take a look.


Also, the BMFA membership numbers stand at 35,200 or 366 fewer than last year's total.  So, the much vaunted claim that the decision to go ahead with the National Centre would cause a mass reduction in membership appears to amount to less than 1%.


Speaking of the National Centre, it appears that it is on course either to break even or better which is good news.  Much of this is down to a very large group of volunteers whose number has greatly surprised the project staff.  That's probably why the NC will not make a loss.


Peter
6
Electric Power / Re: What max revs from a Q80-11S / Spin99 / APC 20.5x14 combo?
« Last Post by TomLaird on 18, November 2017, 05:16:04 PM »
To conclude with an observation: my APC 20.5 x 14 gave 5780 revs on the ground whereas the Biela 20x14* gave 6080 on the ground and 6330 in the air.

On the ground RPM values from the Jeti speed controller, same battery pack with about 10 seconds motor run sequentially:

1st run: APC 20.5 x 14 = 5780
2nd run: Biela 21 x 14 = 6000
3rd run: Biela 20 x 14 = 6080
4th run: APC 21 x 13WE = 6000

* This prop measured 20 1/2 tip to tip when it arrived but a close encounter with our tarmac runway saw it reduce to 20" tip to tip. My latest Biela 21x14 does however measure 21" tip to tip.
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Electric Power / Re: What max revs from a Q80-11S / Spin99 / APC 20.5x14 combo?
« Last Post by TomLaird on 18, November 2017, 03:49:25 PM »
Hi
4 flights today, 16 fig 9's each. All 7 minutes plus landing. 22 to 25% left in battery. 220 rpm drop between each set of batteries. 660 total between best (6550) and worst (5890). I think it is mostly me getting used to the different characteristics of the Mythos versus the Contrast.

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Electric Power / Re: What max revs from a Q80-11S / Spin99 / APC 20.5x14 combo?
« Last Post by TomLaird on 18, November 2017, 09:59:59 AM »
Hi Clive
That is a good data point. Today I am going to fly Fig 9's as a stress test to ascertain the state of the batteries.
cheers
Tom
9
Electric Power / Re: What max revs from a Q80-11S / Spin99 / APC 20.5x14 combo?
« Last Post by Clive Whitwood on 17, November 2017, 08:29:30 PM »
I'm surprised by the lack of power comment.
Revs sound about right compared with what I am getting on my Q8013Xl with a beila 21 x 14.
I am pulling a max of 70A most flights and have power to spare.
Wonder what you are pulling?
10
Electric Power / What max revs from a Q80-11S / Spin99 / APC 20.5x14 combo?
« Last Post by TomLaird on 17, November 2017, 02:30:22 PM »
 Hi,
Does anyone have a feel for what my ballpark max revs should be from a Q80-11S / Spin99 / APC 20.5x14? I am seeing about 5780 (from the Jeti box) which I think is coupled to the lack of power I am seeing. This is over all my battery sets which range from 1 year to 3 years old. My timing is 25 degrees at 8Khz.

I am also getting 6000 from a Biela 21x14 and 6000 from  an APC 21x13WE.

 thanks
Tom

 
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