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TopRCModel FW-190

Old 11-21-2020, 09:37 AM
  #1126  
jimkron
 
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Not sure about Futaba. I have the Saito FG90. I use a y-connector off the ignition box tachometer cable for my in-air telemetry with a Spektrum transmitter/receiver.
One Y-lead plugs into this: https://www.horizonhobby.com/product.../DLEG5525.html (for monitoring on the ground)
The other Y-lead plugs into this: https://www.horizonhobby.com/product...r/EVOA113.html (for monitoring in the air)
This Evolution Adapter then plugs into the RPM port on my Spectrum receiver.
Pretty easy.
Does Futaba have a RPM port? Could these parts be adapted?
Just a thought.

jim
Old 11-21-2020, 10:24 AM
  #1127  
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Originally Posted by elmshoot View Post
Based on the numbers I have here If I want to move the CG aft another 5MM I need to remove about 7.7 OZ.
Getting the weight off the plane will improve overall performance including reducing the stall speed.
Sparky
I'm trying to eliminate some nose weight as well.
From the pictures, it looks like you are flying with the CG just forward of the main wing tube. This would put you maybe 1/2" or 5/8" aft of the recommended 168mm.
Is that about right? Was your plane a little tail heavy in flight or upon landing? Or just perfect?

jim
Old 11-21-2020, 05:36 PM
  #1128  
elmshoot
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Originally Posted by jimkron View Post
I'm trying to eliminate some nose weight as well.
From the pictures, it looks like you are flying with the CG just forward of the main wing tube. This would put you maybe 1/2" or 5/8" aft of the recommended 168mm.
Is that about right? Was your plane a little tail heavy in flight or upon landing? Or just perfect? jim
Jim,
Yes my CG is as depicted, I don't understand your last line. I don't find it overly sensitive and quite comfortable to fly.
I believe I posted my elevator throws as well. You be the judge. I suggest that you do the same as I have and start flying and removing the weight progressively as you gain confidence in the airplane and your ability to fly the airplane. I am certain I can remove more weight and will continue to study that when the summer comes again to the northern hemisphere.
Sparky
Old 11-21-2020, 08:38 PM
  #1129  
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Originally Posted by elmshoot View Post
Jim,
Yes my CG is as depicted, I don't understand your last line. I don't find it overly sensitive and quite comfortable to fly.
I believe I posted my elevator throws as well. You be the judge. I suggest that you do the same as I have and start flying and removing the weight progressively as you gain confidence in the airplane and your ability to fly the airplane. I am certain I can remove more weight and will continue to study that when the summer comes again to the northern hemisphere.
Sparky
In Northern California we fly all year long...except when we're on fire.
Old 11-22-2020, 02:44 AM
  #1130  
Carlo Vangompel
 
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[QUOTE=jimkron;12645903]Not sure about Futaba. I have the Saito FG90. I use a y-connector off the ignition box tachometer cable for my in-air telemetry with a Spektrum transmitter/receiver.
One Y-lead plugs into this: https://www.horizonhobby.com/product.../DLEG5525.html (for monitoring on the ground)
The other Y-lead plugs into this: https://www.horizonhobby.com/product...r/EVOA113.html (for monitoring in the air)
This Evolution Adapter then plugs into the RPM port on my Spectrum receiver.
Pretty easy.
Does Futaba have a RPM port? Could these parts be adapted?
Just a thought.

I checked out the manual of my transmitter, seems that on the T18SZ is a parameter to set the ratio of the rpm, It value was 80, I modified it to 1, now the rpm is ok.



The engine runs great, however, at full throttle for about 1 minute, the temperature rises above 300°K
I hope the baffling will work and cool down the engine during flight.



Carlo

Old 11-22-2020, 05:33 AM
  #1131  
elmshoot
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300K? as in Kelvin? On the ground or in the air? What are you measuring and where is the probe? I don't have the Kelvin scale handy so if its C as in Centigrade that seems high depending on the previously mentioned points.
I see 250F on my sparkplugs on the ground. In the air slightly lower in flight from what others who look at it tell me. I almost NEVER take my eyes off the plane when I'm in flight. From what I see of your ducting I'd tighten up the gaps. Its ok for it to touch the engine. especially the radiator fins between the cly.
Sparky

Last edited by elmshoot; 11-22-2020 at 05:35 AM.
Old 11-22-2020, 05:54 AM
  #1132  
Carlo Vangompel
 
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300° Kelvin or 150° Celsiuson the ground.
The probe is at the backside of the top cylinder, it is mounted with high temperature silicon between the ribs.




I will try later to measure with another device to check the temperature.
Is it possible my prop is too big?
I run a Ramoser 23.8" prop, the pitch is adjusted to 12"
Max. rpm on the ground is about 5800

Carlo
Old 11-22-2020, 12:21 PM
  #1133  
jraycut
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Got mine out yesterday for a couple flights. My good friend Wayne Matthew’s accompanied me along w his Leonardo jet.

This time I flew it for the first time with the SEP 26-16 two blade and cooling fan on back of the spinner. Overall the plane flew great, but I don’t think I have the engine dialed in as yet. It looks like I’m going to invest in some telemetry to get me some real time RPM’s in flight.

Joe











Last edited by jraycut; 11-22-2020 at 12:46 PM.
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Old 11-22-2020, 12:44 PM
  #1134  
jraycut
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Default Moki 150 w SEP 26-16

Here’s a clip of a fly-by

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Old 11-22-2020, 12:49 PM
  #1135  
nswords
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Great sound!
Old 11-22-2020, 01:08 PM
  #1136  
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I already am planing on a GPS and RPM sensors for my FW190. I want to know what RPM the Moki is turning. Nice flyby !
Old 11-23-2020, 06:00 AM
  #1137  
elmshoot
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Carlo,
150C seems a little high to me. But I'm not familiar with that engine. Tighten up your baffles as previously suggested. Go down to 11-10" pitch if you can do the adjustment.

Jaycut,
I'm glad to see Mac Hodges flying field I only visited once about 15 years ago, the hobby shop was in the process of shutting down. I remember the check out was what do you think the pile of stuff is worth and that's what I paid. Some amount less than retail but all fair prices. Your plane looks nice.

Sparky

Last edited by elmshoot; 11-23-2020 at 06:04 AM.
Old 11-24-2020, 12:30 AM
  #1138  
Stephen Crisp
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Originally Posted by jraycut View Post
Here’s a clip of a fly-by

https://youtu.be/YeQRgqyWxjE
Hi Joe
Interested to know where you bought the fan.
Thanks
Old 11-24-2020, 02:44 AM
  #1139  
tom.kart
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Carlo[/QUOTE]

Hello, did you open the cowl below?
Old 11-24-2020, 04:57 AM
  #1140  
jraycut
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Thank you for the compliments guys!

Yes, Mac is a great guy. He was flying a couple of his home builts while we were there. The hobby shop is now a great big hanger

I had gotten the fan from a fellow member here in the forum as he had come across another style fan to use. The fan was made by, Rev.

I did open the bottom of the cowl up more than what I had before as well as adding some air deflectors on the bottom to help pull some of the hot air out.
Old 11-24-2020, 05:44 AM
  #1141  
Mpizpilot
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Originally Posted by bobk3597 View Post
Does anybody have a fan for this model they would like to sell ? or know where to get one. I tried to contact the person in Europe referred to in this build who was doing the printed versions but got no response.
This will be going into the FW190 in combination with a Moki 150 engine, and a TopRCmodel spinner/backplate.
Thanks
I’ll take a look when I get home later, should still have mine.

Still have, got it from Rev. Flew with it once.






Last edited by Mpizpilot; 11-24-2020 at 02:01 PM.
Old 11-24-2020, 07:36 AM
  #1142  
elmshoot
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Jraycut I think got the fan from me......
I didn't cut any extra holes in my cowl just the two scale exhaust on the sides and maybe about 1/8" clearance around the exhausts pipes that sit flush with the cowl. Before you add holes in the cowl do reduce the pitch on the prop and tighten up the baffles.



I found this view of the exhaust exits. Ignore the globs of oil paint as I am documentating the weathering on my plane it got a lot dirtier from here!
I've previously posted pictures of my engine duct work.

Sparky
Old 12-01-2020, 11:40 AM
  #1143  
mgosson
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Default Remote Choke for Saito 90

Good Day,
After performing a test run / break-in on the Saito FG-90 mounted to a test stand my friend said "you need a servo operated remote choke". I thought about and decided the 190 needs added weight in the nose anyway, why not try it.

I made a hardwood mounting block that attaches to the engine mount (T shape) along with a servo tray that screws into the hardwood block. Mounted a mini size servo to the tray and used a piece of pull-pull cable to connect the throttle arm to the servo arm. The cable offers free movement through the rotation of the carburetor with no binding. At the closed throttle position the servo will pull on the carburetor barrel and activate the choke. It's pretty slick.





Old 12-01-2020, 06:07 PM
  #1144  
Stephen Crisp
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Great idea - well done!!
Old 12-02-2020, 06:33 AM
  #1145  
elmshoot
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I see the carb intake is inside the fuse. My 60cc motor is similar. I am using a 3 line fuel system. During fueling I discover the carb will dribble a few drops of fuel out of the intake.
That isn't good to trap raw fuel inside the airplane. I also learned that over driving the carb all the way closed will stop it from dribble Move the throttle stop screw out as far as possible. It will stop the fuel dribble. But it is a position I never use in normal engine operation. I have it set to failsafe to that position so after engine shut down I turn the RF off on the TX and it goes into preset failsafe and overdrives the throttle way closed.
YMMV
Sparky
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Old 12-04-2020, 01:29 PM
  #1146  
mgosson
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Advice taken, and will be implemented.
Thanks Sparky

M Gosson
Old 12-07-2020, 06:13 PM
  #1147  
jraycut
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Hey guys, kicking around the idea of possibly selling my FW. If anyone is interested or may know of somebody that is, please PM me, (my build started on page 35, post 860 most recent pics on page 46, post 1135)

thanks,
Joe
Old 12-08-2020, 06:59 PM
  #1148  
scottme262
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Hi Joe,
Im interested, I sent you message.

Scott
Old 12-09-2020, 08:29 AM
  #1149  
jraycut
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Got your message and sent you an email.
Thanks for the interest.

Joe
Old 12-12-2020, 09:23 AM
  #1150  
Eodcdrfl
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I wonder if I could get a favor from you that have completed construction? At your convenience, post photos of your internal set-up (radio, batteries, ignition, the guts). My initial balance came out 8 pounds nose heavy using the Xicoy weight and balance system at 1 inch behind the manual recommended CG. The engine I’ve mounted is the Fg90r3. I can not even consider the amount of dead weight required to balance so I have sense stripped my internals for a re-do. I have the Top RC Zero with UMS 5-75cc that flies like a dream so my balancing using the Xicoy is spot on. Again, as you have time available, it would be very much appreciated.

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