Bob Paris

My Feedback: (13)

Hay Flycatch,
I would think that a OS 1.08 would not over power the model. I've seen 20cc gas engines installed, 1.20 4-strokes and I've a K&B 1.00 in mine. As the props get longer, the torque factor on take off and climb out is increased, so be ready for it. Other then this...let her rip, the OS 1.08 will haul this beauty right nice.
Soft Landings Always,
Bobby of Maui

ThunderBoat42

My Feedback: (1)

Thanks Bob.. I was actually looking back for a photo of your K&B install. Such a clean fit.

flycatch

My Feedback: (26)

Ok posters no one has published the overall weight wet with so may different engine combinations. I just finished installing the landing gear assembly which is electric with Robart struts and wheels. The airframe now weights 10.7 lbs dry. Is anyone flying this airframe at this weight?

ton2di

My Feedback: (182)

Yes. Mine was about 11 lbs and 4oz with robart struts/wheels and an OS FS200 swinging an APC 15.5x12 4 blade.

ThunderBoat42

My Feedback: (1)

Mine flies great but haven't weighed it. Same big power as Ton2di using a slightly heavier YS and Robart electrics/struts. MG servos etc. Guess I should weigh it as I am sure it's pushing 12lbs with 2x2100mah life batteries.

j301

My Feedback: (12)

So is it that thing "whistling dixie" when you fly it? (IE did the train caller work?) Any video yet? Sadly mine is still in its box, but I did just get the servos I need for it, that makes every thing, now just for the time. Have a F4U in front of it that is refusing to play nice on its build, and a bunch of mods to my others going on, but hopefully in the next month or two...

ThunderBoat42

My Feedback: (1)

Oh man,, it tirned out great... Not too loud ... Very similar to the ones full scale in the video. I don't have a way to video.. But already asked my son if he would get one got me. We were laughing and saying the video is like a curse... Filming some freakish demise.

flycatch

My Feedback: (26)

I'm new too mounting a 2 stroke inverted but believe it or not the OS 1.08 didn't care. The only modifications I made were to run a three line fuel system with a two way shut off valve installed in the draw line. I also installed a OS "F" type glow plug. The engine required no tuning at the low end and only a few degrees' rich from the 1 1/2 ccw setting of the HS needle valve. It appears the tank position is not a factor when using this engine.

ThunderBoat42

My Feedback: (1)

yeah.. they are set up with the tank considering an inverted application.

flycatch

My Feedback: (26)

Thunderboat42, what size engine are you using to turn that four bladed propeller?

ThunderBoat42

My Feedback: (1)

I am using the YS170. With the Biela 17.25" scale mustang prop. It's carbon fiber and has all the markings. I got it through Troy Build Models.

Actually, I just posted on the other site this relating to power options to save re-typing on my phone. Unfortunately on RCU I can't cost pics here from my phone. Must be at a real Computer ......

Tempted to try the 16x8 biela mustang prop but $90 prop to 'test' and considering APC issued a wanrning on their 15x12 4 blade saying not to use on anything bigger than the YS 140 - still considering. So that's an option to anyone looking at wanting to use a 4 blade prop too... YS140 and the 15" APC 4 blade. It weighs abt the same as the OS120. The APC is abt $15 as compared to the $90 for the Beila.

To those wanting to go scale like I do......The new YS180 sport is now out.. Powerhouse in a lightweight package and supercharged. It will turn the scale biela 17.25" 4 blade Mustang prop with a simplified fuel pressurized tank/supercharger system as compared to the more complicated fuel injection / supercharger system I am using. The superchargers are similar to the roots type system and are crankshaft driven. They do have that roots type loud 'whine' at the upper RPM. - which I think is cool. (And why the boat has two supercharged engines instead of turbo's.. Sounds Better. LOL)

j301

My Feedback: (12)

Try built, sounds like my workshop!!
You barely got the 170 in, now you'r on to the 180, you my friend seem to be stuck on the same step (of the 12 step program) that I am... "..I admit I am powerless to overcome it, especially with internet access and a credit card..."

ThunderBoat42

My Feedback: (1)

TRY Built... LOL... that's an oops but fitting huh? LOL. TROY BUILT MODELS ..... actually, the 180 is the same size. just more cubes... I love cubes!!! I am a YS junkie. supercharged Junkie too.

ACTUALLY... I really LIKE this Top Flight P51. Great size...Flies GREAT!! It's not as big a hit when it comes home in a trash bag.... AND it will eventually. My 18 year old goldberg Ultimate did all because I got distracted and forgot to strap the battery in. So i just have myself mentally prepared for destruction. LOL

Your quote LOL "ARF\'\'s; because it\'\'s less depressing to take out a box of plane and bring back a box of sticks." is exactly why satisfying my kit building is limited to Sig Kadet, goldberg eaglet etc. Less chance of 're-kitting' them.

flycatch

My Feedback: (26)

Thunderbolt42, I reweighed the airframe and the original weight I posted was in error. The actual overall weight dry is 10.7 lbs. I ordered a Biela 14X8 four bladed prop from TroyBuilt Models. Will the OS 1.08 provide sufficient RPMs to fly this model using this propeller?

ThunderBoat42

My Feedback: (1)

Supp Fly! I'm not real familiar with thay engine. The guys are reporting 2 blade 15*8 on that engine. Some trying 16*8. My rule of thumb for same pitch is -4 on the 4 blade. Or -5 starting point on the combo pitch& blade reduction. That would put you at about 12" to 13". Get it broken in good and give it a shot on 20%. Would be good info to know. 2 strokes are generally lower torque and higher rpm.
I don't remeber what Bob ended up with on the K&B.

acdii

So, does a Saito 100 fly the 60 ARF well? Thinking of getting an ARF to get the hang of flying one before my Kit built one is done. Would rather take a chance on a possible wreck on a $300 plane than a $1200 plane. That doesn't include the time spent building it. For servos, anything wrong with using Futaba 3010 servos?

ThunderBoat42

My Feedback: (1)

Well Hello fellow Kadet Bro!! Yes, The Saito will fly the plane great and facilitate a little lighter wing loading. The plane will fly on the standard servos also and are referenced in the manual. I went to metal gear HT servo;s only because I have powered the plane with double the power it rated for and subsequent higher vibration potential.

acdii

Ordering one!

ThunderBoat42

My Feedback: (1)

Hey...I am a big LHS promoter .... BUT... in this case ..... Tower has for $299 now... THey also have a coupon code on the home page of the web site and free shipping this month. Or try Coupon Code 14478 which is $30.00 off $299 or more if that one is better than the web site code.
Thats down to $270 w free shipping.. Gezz.... I may need a back up. LOL

acdii

Thanks! I forgot about the codes, and just deleted a bunch of their emails too.

flycatch

My Feedback: (26)

When you balance the plane do it with the gear extended. I confirmed this with Top Flite. We all know this is not the proper technique when it comes to balancing a model with retracts.

j301

My Feedback: (12)

That is odd, Were there some issues caused by this in the past?

acdii

I can understand the reasoning behind that, balance can be the most critical during take off and landing, so setting CG with them extended makes sense. Sounds like they set up the gear to really throw the nose off when retracted.

flycatch

My Feedback: (26)

It appears that many have used other CG locations ranging from 5" to 5 1/4" with no mention of the position of the gear. I'm sticking with the recommended CG location with the gear extended. With the gear extended it balances at 27% and with the gear retracted it is 30% MAC. Dial in 20-30 percent exponential on elevator and you should be okay in pitch sensitivity.

brockettman

I had the Saito 100 in one for a while. Flew very nicely, plenty of thrust but not a lot of top end speed. I really like the S3010 plenty of torque for the 60 size warbirds.