Ryan Smith

My Feedback: (25)

They've done rather well, especially considering how soggy the ground has been.

Ken Bryant

My Feedback: (10)

I can definatly dig an ARC version! I prefer to be a little different when I fly

mups53

My Feedback: (41)

The plane is drop dead good looking. I really think they are going to do very well with it. Thanks for all the pics and the updates Ryan. Mike

Mike Wiz

My Feedback: (2)

Electric power systems can vary considerably, but I'll take a shot at an affordable one (E-Flite outrunner) and a more expensive one (Hacker Inrunner) if somebody would post the wing area. As it is I see the weight is 7 lbs 10oz with the Y.S. 1.10. According to the specs at Central Hobbies that's approximately a 26 oz motor. The wing area given is 66". I'm going to use my air density here at 800' MSL and plug everything into Motocalc. I should get a couple pretty good answers, but I won't guarantee they will be the very best answer for this plane. That usually takes some time and it also is dependant on the plots preference.

So, with that in mind, what's the wing area?

Cheers,

Wiz

Mike Wiz

My Feedback: (2)

OK, I made an an assumption about the wing area of 1100 sq.in. This will get Motocalc in the ballpark, which is all you can ever do with Motocalc.

Here is the first set of numbers. This system happens to be the same I use in my Dream 110. It works very well.

Focus Sport
850ft above Sea Level, 29.92inHg, 56°F

Motor: Hacker C50 10XL; 1624rpm/V; 1.26A no-load; 0.0118 Ohms.
Battery: Thunder Power TP2100 (ProLite) (15C); 8 series x 3 parallel cells; 2100mAh @ 3.7V; 0.018 Ohms/cell.
Speed Control: Castle Creations Phoenix 80; 0.001 Ohms; High rate.
Drive System: APC 18x12 Electric; 18x12 (Pconst=1.31; Tconst=1) geared 6.7:1 (Eff=92%).
Airframe: Focus Sport; 1100sq.in; 149oz RTF; 19.5oz/sq.ft; Cd=0.043; Cl=0.06; Clopt=0.42; Clmax=0.81.
Stats: 184 W/lb in; 161 W/lb out; 25mph stall; 35mph opt @ 56% (55:03); 94mph level; 3892ft/min @ 90°; -503ft/min @ -9.3°.

Warning:

• MotoCalc was unable to determine a throttle setting for hands-off cruise airspeed, so the best lift-to-drag ratio airspeed and throttle setting will be used instead.
• Inability to determine a throttle setting for an airspeed usually means the model is not capable of reaching the required speed with the given power system, or the airfoil information has not been specified correctly.

Power System Notes:

• The full-throttle motor current at the best lift-to-drag ratio airspeed (62.8A) falls approximately between the motor's maximum efficiency current (53.2A) and its current at theoretical maximum output (1124.5A), thus making effective use of the motor.
• The voltage (26.4V) exceeds 12V. Be sure the speed control is rated for at least the number of cells specified above.

Aerodynamic Notes:

• The static pitch speed (70.7mph) is within the range of approximately 2.5 to 3 times the model's stall speed (25.4mph), which is considered ideal for good performance.
• With a wing loading of 19.5oz/sq.ft, a model of this size will have trainer-like flying characteristics. It would make an ideal trainer, for use in calm to light wind conditions.
• The static thrust (255.2oz) to weight (149oz) ratio is 1.71:1, which will result in extremely short take-off runs, no difficulty taking off from grass surfaces (assuming sufficiently large wheels), and vertical climb-outs. This model will probably be able to perform a hover or torque roll.
• At the best lift-to-drag ratio airspeed, the excess-thrust (168.3oz) to weight (149oz) ratio is 1.13:1, which will give very steep climbs and incredible acceleration. This model can easily do consecutive loops, and has sufficient in-flight thrust for any aerobatic maneuver.

General Notes:

• This analysis is based on calculations that do NOT take motor heating effects into account. This also means that no calculations were done to determine if the motor might overheat.
• These calculations are based on mathematical models that may not account for all limitations of the components used. Always consult the power system component manufacturers to ensure that no limits (current, rpm, etc.) are being exceeded.

Mike Wiz

My Feedback: (2)

Here is the second set of numbers from Motocalc. It's a lighter and more affordable setup. I have a friend that used this system on his Dream 110 and he liked it quite well.

MotOpinion - Focus Sport
850ft above Sea Level, 29.92inHg, 56°F

Motor: E-Flite Power 60 Outrunner 400KV; 400rpm/V; 2.7A no-load; 0.06 Ohms.
Battery: Thunder Power TP2100 (ProLite) (15C); 6 series x 2 parallel cells; 2100mAh @ 3.7V; 0.018 Ohms/cell.
Speed Control: Castle Creations Phoenix 80; 0.001 Ohms; High rate.
Drive System: APC 16x12 Electric; 16x12 (Pconst=1.08; Tconst=1) direct drive.
Airframe: Focus Sport; 1100sq.in; 127.5oz RTF; 16.7oz/sq.ft; Cd=0.043; Cl=0.06; Clopt=0.42; Clmax=0.81.
Stats: 132 W/lb in; 104 W/lb out; 23mph stall; 33mph opt @ 50% (32:15); 87mph level; 2166ft/min @ 48.7°; -465ft/min @ -9.3°.

Warning:

• MotoCalc was unable to determine a throttle setting for hands-off cruise airspeed, so the best lift-to-drag ratio airspeed and throttle setting will be used instead.
• Inability to determine a throttle setting for an airspeed usually means the model is not capable of reaching the required speed with the given power system, or the airfoil information has not been specified correctly.

Power System Notes:

• The full-throttle motor current at the best lift-to-drag ratio airspeed (55.3A) falls approximately between the motor's maximum efficiency current (29.4A) and its current at theoretical maximum output (161A), thus making effective use of the motor.
• The voltage (19.2V) exceeds 12V. Be sure the speed control is rated for at least the number of cells specified above.

Possible Aerodynamic Problems:

• The diameter (16.0in) to pitch (12.0in) ratio is less than 1.5:1, which will result in reduced propeller efficiency at low speeds (the propeller is stalled). Although this is not likely to affect flying characteristics, it may make take-off or hand launching difficult.

Aerodynamic Notes:

• The static pitch speed (72.3mph) is within the range of approximately 2.5 to 3 times the model's stall speed (23.5mph), which is considered ideal for good performance.
• With a wing loading of 16.7oz/sq.ft, a model of this size will have very sedate flying characteristics. It will be suitable for relaxed flying, in calm or very light wind conditions.
• The static thrust (140.3oz) to weight (127.5oz) ratio is 1.1:1, which will result in extremely short take-off runs, no difficulty taking off from grass surfaces (assuming sufficiently large wheels), and vertical climb-outs. This model will probably be able to perform a hover or torque roll.
• At the best lift-to-drag ratio airspeed, the excess-thrust (95.9oz) to weight (127.5oz) ratio is 0.752:1, which will give very steep climbs and incredible acceleration. This model can easily do consecutive loops, and has sufficient in-flight thrust for any aerobatic maneuver.

General Notes:

• This analysis is based on calculations that do NOT take motor heating effects into account. This also means that no calculations were done to determine if the motor might overheat.
• These calculations are based on mathematical models that may not account for all limitations of the components used. Always consult the power system component manufacturers to ensure that no limits (current, rpm, etc.) are being exceeded.

randy10926

My Feedback: (19)

I would be surprised if the wing area was over 850 sq inch. The full sized focus wing is less than 1000 sq inch.

Randy

Ryan Smith

My Feedback: (25)

The Focus 2 has a 977 sq in wing area and this iteration has an 800 sq in wing area.

The airplane is surprising us more and more. It flew three flights of P-07 in the wind on Sunday and did really well.

randy10926

My Feedback: (19)

Man, I am thinking of campaigning with one of these this year.

Randy

Mike Wiz

My Feedback: (2)

Well, the difference in wing area changes the wing loading part of the calculation and the hands off cruise speed, but nothing else.

This plane is a lb lighter than my Dream 110. I'd be very tempted to try the affordable Eflight outrunner on 6S. I know Motocalc doesn't predict an incredable thrust to weight ratio with that setup, but it's been my experience that Motocalc under estimates the abilities of outrunners. In fact, if I get one of these planes that's the system I'll use. I might be tempted to try a similar AXI or Hacker outrunner, but a 6S powered outrunner is what I'd go for.

I'm going to start setting aside some money for a plane like this now.

Wiz

team3d

I can't wait for the focus 90/110 comes out. I will go eletric and I will probably use the
E-flite power 60 for a motor. Keep us all updated about release dates and ect. I think
I found my pattern plane for this year. love it.

Team3d

Mike Wiz

My Feedback: (2)

Here is an NIB system forsale. http://www.rcgroups.com/forums/showthread.php?t=629483

No. It's not mine. I'm still saving up to get soemthing.

Wiz

srekar

I just spoke to Dave and he told me the details regarding price and avilability will be published on their website in a week or so. One more week to go

Srikar

randy10926

My Feedback: (19)

Anybody heard anything yet?

srekar

This morning, again i called up Steve and came to know that they will have the price this week sometime and the actual item will be avilable in 6 weeks from now. They are activily negotiating the price and someething will be announced this week. Steave also told me that, they are going to test the model this week with a new muffler from central hobbies that actually runs inside the cowl and goes down the cowl instead of side of the cowl.(making a hole on the side). I asked him about using the mini servos on the tail instead of standred servos and seems like they will stick with that option. We will se some information on their site this week.

srekar

>I am expecting pricing and delivery this week. We will post on the web
site as soon as it is available.

Dave



Hi Dave,
>
> I am just wondering to know, when the Focus 90/110 is going to be out?
> Price/Availability.
>
>
>
> Thanks
>
> Srikar.
>
>

srekar

OK. Finally their website updated with the new model info. Check that out.

randy10926

My Feedback: (19)

it is?

IShootSharpStix

My Feedback: (4)

http://www.piedmontmodels.com/News.html

Rebellion

My Feedback: (2)

Checked the site again. Still no pricing or solid availability info.

Ryan Smith

My Feedback: (25)

I'll have something on there by this evening.

Rebellion

My Feedback: (2)

Thanks Ryan. The Focus Sport appears to have a lot of potential for someone like me who is just getting started in pattern, but I'm sure you know this already.

pappy35

I just talked to Dave and he said they're looking at availability in a couple of months and pricing info in another week or so. Keep an eye on the website...

Ryan Smith

My Feedback: (25)

Al,

I assume you were the one that called this afternoon. We do not know what the availability will be as of right now, but the factory in China is fully ready to begin production. The Chinese New Year is coming up, so I am not sure how that will affect production, if any at all.

The price is somewhat nailed down, and will be in the $400 range. You have to take into consideration that this really is a good sized airplane; it is 9/10 the size of a 2 meter airplane, for half the cost of the Focus right now. Coupled with the fact that you don't need to run an expensive motor and tuned pipe, it really becomes a viable alternative. I know of someone here in my district that is planning on flying one in Advanced when they become available.

I really don't want to sound like a broken record, but I think everyone will be impressed with this airplane. It has caused a lot of excitement amongst Piedmont themselves, and I would think that everyone else would feel similarly.

mini fly

My Feedback: (4)

I was thinking about a FocusII, but with a wedding and a new house this year, the sport looks a lot easier on the pocket book for now. Can't wait for the release.