RE: Focus Sport 110 YS Powered  
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RE: Focus Sport 110 YS Powered - 4/5/2008 3:57:00 AM   
Troy Newman


 

Posts: 2429
Joined: 12/30/2001
From: Goodyear, AZ, USA
Status: offline 		Randy,

sorry it took so long. This has got to be the worst start to my year ever. Car got rear ended parked on the street in front of my house. Hit and run. But we found the drunk Lolita and her insurance company took care of the car. Then I got sick end of February for about a month with a really bad flu that turned into a bronchial infection. Now I get my Expedition broken into with my model stuff in it. They got my phone as it was in the car too. Along with other goodies like GPS, Camera, and my Wallet. I was at Physical Therapy for a busted up knee with torn ligaments so I was exercising and was leaving my phone and wallet under the seat out of sight. All this and stealing my TX's, tool box a bunch of spare stuff and breaking the wings on my model while they tried to get it out the side door. man this really blows.

Back to the Focus Sport
What you did is fine....That cowling is pretty stout and It probably doesn't need these extra former pieces coming off the nose ring mount...but the rear beefing you did on the rear former is excellent. This will work very well for you.

Just keep watching the weight you don't need to over built too much. This cowling area is probably good for the long haul this way. I was trying to make my nose ring mount as light as possible. You could go in on yours and dremel away some of the extra material in the front mounting area....But then again you are not going to cut but maybe 1/4oz or maybe 1/2 max out of it. Looks good you will enjoy it being in there as opposed to running the "A" mount without a nose ring at all.


Troy Newman

< Message edited by Troy Newman -- 4/6/2008 1:31:46 AM >

(in reply to ROOKIE PILOT)
       Post #: 226

RE: Focus Sport 110 YS Powered - 4/5/2008 9:11:15 AM   
majortom-RCU


 

Posts: 1558
Joined: 12/11/2001
From: Merrimack, NH, USA
Status: offline 		Troy, we hate to hear about anyone getting worked over by a cruel and indifferent world. Sorry to hear about so much of that coming down on one guy.

As to the nosering fixed to removable cowl, I had pondered such a modification in the past, but never got past the simple sketch stage. This looks like a really solid innovation, inspires me to add it to my next model. Thanks for a very useful and informative thread.

(in reply to Troy Newman)
       Post #: 227

RE: Focus Sport 110 YS Powered - 4/5/2008 2:25:20 PM   
MarkGrabowski


 

Posts: 113
Joined: 11/11/2004
From: addison, IL, USA
Status: offline 		Dang, Troy! Sorry to hear you've gotten hammered so hard lately...
They are probably wondering **** to do with your JR radio... probably haven't a clue what it is!!!

(in reply to Troy Newman)
       Post #: 228

RE: Focus Sport 110 YS Powered - 4/8/2008 3:35:34 PM   
randy109


 

Posts: 77
Joined: 7/10/2006
From: Manassas, VA, USA
Status: offline 		I am going the two stroke way with my Focus Sport. I am going with the OS1.20AX than I had in a Venus 2. First you will not need the back plate in front of the firewall. The OS 1.20 on an engine mount will reach the front of the cowling. You will need to make something behind your engine mount to give you the right and down thrust. I was not able to get the provided engine mount to work. It is too narrow for this engine. So I am looking for a mount and will get back when I have worked though the options.

Next I needed to decide on what orientation to place the mount the engine. Basically there are three options: inverted, muffler straight under the plane (engine at 7 o'clock) or engine to the side (9 o'clock) with a pitts style muffler. No inverted pitts style muffler exists; so to use this option you need to use a header and pipe setup. Since I want to keep it simple (stupid); I am not going this way. You can use the stock muffler with the provided 90 degree extension or a three party muffler on the 9 o'clock option. Both of these mufflers end up being wider than the cowling. So you would have the engine head sticking out the cowling and the muffler out both sides. I plan on going with the 7 o'clock option. I used this option on my Venus. You really cannot see the muffler when it is on the bottom. The glow plug is easy to get to. The engine makes a little more power. Additionally a third party muffler is available for this setup that is half the weight of the stock muffler. This give a option to reduce total weight and move the CG backward if needed.

I have gone with Troy's better servo option. I was able to get the JR coreless servos NIB or nearly NIB from this site for about $40 each. They are mid size servos so you will need to make some adjustment to the servo mounts.

< Message edited by randy109 -- 4/8/2008 3:36:54 PM >

(in reply to MarkGrabowski)
       Post #: 229

RE: Focus Sport 110 YS Powered - 4/24/2008 2:47:10 PM   
randy109


 

Posts: 77
Joined: 7/10/2006
From: Manassas, VA, USA
Status: offline 		More on the OS1.20 AX effort.

The company that makes the supplied hard model that comes in the box also makes a 120 sized engine mount. It is just like the provided mount except the distance between the beams is greater. It OS1.20 AX fits just fine. The bolt pattern is exactly the same so it is a simple unbolt the old and bolt on the new process. You still need to use the provided adjusted with this mount. You could also use a 1.20 nylon mount like the great planes one. Personally I have a problem using one of these for an engine that puts out more than 3 HP.

Now for the BAD news . The engine will fit at the 7 O'clock position but the muffler will not. The provided extension is not long enough to get the muffler (or any replacement) under the firewall. It appears I need to either make a longer extension or cut a muffler tunnel into the firewall and part of the bottom of the model. From looking it I do not see how any 2-stroke on the market is not going to have the same problem enough the RE engines may have problems getting enough drop, quickly enough to fit. I may test fit an 0S1.40RX to see how it looks.

I will report again after I figure out what to do.

Addition: I have not been able to find a replacement extension that will work. But it appears that using two stock extension should work.

2nd addition: Well it seems I miss spoke about replacement mufflers not fitting. The new MACs os1.20 AX one piece muffler just came in the mail. This is nice looking black muffler. It has a built in extension for connecting to the engine. The combination of one stock exhaust extension and the extension on the MACs extension appears to be just right. It may end up that I need relief the bottom of the firewall a little for clearance. Now the only remaining issue in installing the engine is where to find a 3.5 inch number 10 bolt.

< Message edited by randy109 -- 5/9/2008 5:26:29 PM >

(in reply to randy109)
       Post #: 230

RE: Focus Sport 110 YS Powered - 5/11/2008 12:17:35 AM   
Chuck Hartmann


 

Posts: 2
Joined: 5/3/2008
From: Newport Beach, CA, USA
Status: offline 		Hi Troy,

(You may recognize me from So-Cal contests, particularly Riverside; I fly a red and yellow Focus with an O.S. 1.40.)

You had to build your Focus Sport according to the instructions, to be fair. I didn't have to, so I built it with some changes. The one I want to tell about here is that I used only one elevator servo. I didn't see a torque need for 2 elevator servos but I thought they may have been used because the plane needed tail weight. I assembled my Focus Sport completely, including the engine and aileron servos, but without the rudder and elevator servos and the battery. (I also made a short tunnel along the bottom of the fuselage and ran a Johnson flex-header through it rather than having the muffler stick out the side of the cowl.) It balanced almost exactly at the recommended CG. So, I mounted the rudder servo on the rails provided at the rear of the canopy hatch, I added another set of rails just forward of those and mounted the elevator servo there, and connected the elevator servo to the elevator control horns using a large MK bell crank (Central's part #MKD1251). With that arrangement, I had to put the battery (5.2oz 4-cell 1200 mah) just ahead of the bulkhead at the front of the canopy hatch to get it to balance at the recommended CG. Doing it this way, I saved the tail weight of a second elevator servo (I did add the weight of the flex header but I don't like seeing the muffler sticking out the side of the cowl).

I made the first flight of my Focus Sport last week. So far, I like the way it flies with the CG at the recommened position.

(in reply to randy109)
       Post #: 231

RE: Focus Sport 110 YS Powered - 5/11/2008 1:05:12 AM   
Troy Newman


 

Posts: 2429
Joined: 12/30/2001
From: Goodyear, AZ, USA
Status: offline 		You know Chuck, Great Minds think alike. I have been a busy little builder this spring.

Here is the latest changes to the Focus Sport.


I added a pipe tunnel and installed the Hatori short 726 pipe....

It looks really good. I have not flown it yet this way...This was being built concurrent with the Rusty Dose Zeque repair.

A hole was cut int he bottom of the firewall. This allowed the header to pass through the firewall. Then a floor was built to give clearance. The Gear plate is the deciding factor on how deep it can be. Since I didn't want to change the location of the gear plate I just worked with the model had for location. You could do it so the muffler is flush, but its not that critical. Its on the centerline of the fuse. Much better than hanging off the side.

The floor for the tunnel was 1/8" Lite ply. Then I boxed in the sides with vertical grain balsa. The flooring got a 1/4" balsa Triangle stock at the firewall to give a ledge to glue to. Then it attached flush to the bottom side of the gear plate. The rear "angle ramp" is 1/8" balsa.

Once it was all sanded and done I coated it with thin finishing resin epoxy to fuel proof it. This was done to be very light so we didn't need to shift the CG much. The Flight Battery Pack is directly under the wing tube before the modification. I suspect it will move aft now. I have not moved the pack or check the CG yet with it.

You still need a hole in the side of the cowling for the header to clear while on the Hyde Mount. The hole is actually a little more forward than using the stock muffler yet it it doesn't need to be as large.

Now the Model looks like a Pattern model and will be much quieter. The other benefits will be in the trim setup. The muffler hanging out the side required about 3/4 oz on the opposing wing tip to laterally balance the model. You have to fly it to test this balance...you can't laterally balance a model on the bench. You will always waste your time...It has to be flying. I suspect leaving that weight on the tip will will show the heavy wing. I'll report back when I fly it again.

This spring has been a busy time, lots of projects going and getting finished up. The Focus Sport is now ready to fly again. Just need to check the CG, and move the battery pack aft to get the location back to where it was. Using my spread sheet and scales its a piece of cake. The CG will be exactly the same as before when I'm done.

I also have a slightly bigger task of starting over with the radio program. I have that work underway. The great thing about JR radios is its quick and easy work. The problem is I just need to take the time to do it. Right now other models are the priority.


many photos below..................
Troy Newman


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(in reply to Chuck Hartmann)
       Post #: 232

RE: Focus Sport 110 YS Powered - 5/13/2008 4:06:18 AM   
Chuck Hartmann


 

Posts: 2
Joined: 5/3/2008
From: Newport Beach, CA, USA
Status: offline 		Troy, I did essentially the same thing.


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(in reply to Troy Newman)
       Post #: 233

RE: Focus Sport 110 YS Powered - 5/14/2008 8:02:45 PM   
wagen017


 

Posts: 394
Joined: 10/5/2003
From: Eindhoven, NETHERLANDS
Status: offline 		This is a really great threat for many pattern flyers in my opinion. Thanks for this Troy!

I wonder if it wouldn't make sense if this tread at the end would be cleaned up a bit and then gets a "sticky" so it always shows up at the first page of the pattern flying part. Although this is about the Focus sport, a lot is applicable to any plane. I am planning now to build a Fliton Inspire-90, but all I read I can use for sure.

Volkert

_____________________________

Club Saito member #371

(in reply to Chuck Hartmann)
       Post #: 234

RE: Focus Sport 110 YS Powered - 5/14/2008 9:28:14 PM   
flywilly


 

Posts: 845
Joined: 2/3/2002
From: glen allen, VA,
Status: offline 		Hey Randy109, better buy some extra muffler bolts. That's a pretty long extension for your muffler. I know that the OS instructions recommend against excessive extensions. You might want to support the muffler with a tuned pipe mount.
-Will

(in reply to wagen017)
       Post #: 235

RE: Focus Sport 110 YS Powered - 5/15/2008 2:38:26 AM   
Jeff-RCU


 

Posts: 331
Joined: 3/8/2002
From: columbus, IN, USA
Status: offline 		Well, I can finally join the fun. At the current price, it's a very impressive arf. Since I'm not really competing routinely anymore, the smaller plane is much easier for me to deal with. I just slipped it all together and it's pretty square to the world without any tweaking. Two or three good evenings is all it'll take to get all the assembly done. I usually build my 2 meter planes, but this is very nice. I'm still struggling with engine choice (I still have 7 gallons of two stroke fuel in the garage). Is anybody flying this plane with any engine other than the YS1.10? Or should I bite the bullet, get a YS and find somewhere to buy nitro to add to the fuel I have? Will the YS run on 15%?

_____________________________

Jeff

(in reply to flywilly)
       Post #: 236

RE: Focus Sport 110 YS Powered - 5/15/2008 4:06:54 AM   
Jeff_edge540


 

Posts: 142
Joined: 9/24/2006
From: Austin, TX, USA
Status: offline 		The OS 1.20 AX 2-stroke produces about the same power as the YS 1.10. However, the 2-stroke doesn't have the low and mid range throttle response that the YS has.
With any 2-stroke that sits 12 inches away from the fuel tank - put a pump or a cline regulator on it.

(in reply to Jeff-RCU)
       Post #: 237

RE: Focus Sport 110 YS Powered - 5/15/2008 6:17:30 AM   
Troy Newman


 

Posts: 2429
Joined: 12/30/2001
From: Goodyear, AZ, USA
Status: offline 		This model is really good with a YS 110 in the front. I mean it has all the power and flies like the 2M meter birds. The throttle response is the same, not fuel draw issues, no muffler issues when using the Hatori setup its just like a regular pattern model. I think that was the idea behind it. Not so much a beater but a model that a guy can use in the lower and middle classes and fly well. Learn how to land, fly straight, snap, spin, stall turn, and the other little tasks that a guy coming through the ranks needs. All of this done with a less expensive and easy to repair model.

Just my 2 cents. The YS 110S is the hoss in this thing. It would not fly nearly as well without the power. With the power its powered like my 2 meter models so it makes it easier to fly that way.

Yes I'm bias, but I have also flown it.

Troy Newman
Team YS

(in reply to Jeff_edge540)