Guys ... I need a little assitance here, I just knocked off my 72" Pacific Aeromodel Laser 200. I have a TT120 sitting about now. My question is can I install the TT120 into something like a 60/90 sized aerobatic plane. Anyone tried this? I am worried about wing loading and how the plane would handle. I was thinking of maybe a GSP Extra 300 90. Some plane with a 65"+ wing span.

Please don't ask me to get a F90 etc etc ... already have one ready to go up. Thanks a lot!!!

Can you slap a 120 in a 60/90 size aerobat? Of course you can. I do it all the time.

The key to not ripping the plane apart is to realize how much power you have and then keep your left thumb under control. Throttle management is crucial when you've got 50% more power than recommended.

Balance is no problem. Use a Metal Hydride battery to keep the weight down. Then resist the urge to buy a big honking MH battery the same size and weight of a NICad. The whole point of a MH battery is that they are lighter and smaller than niCAD. So get a 1000mah 6V battery for it and call it good.

You can use smaller high torque servos in a plane that size. Get some mid size servos with plenty of torque. They will most likely svae you about .5--.75oz per servos. You can save a couple of ounces of weight there.

Use a smaller RX. The Hitec 555 is an excellent RX and it'll handle 5 or 6 servos with ease. It's got all the range of a full size RX, and it'll save you an ounce or two.

Scrap the stock muffler on the TT120 and get a Macs pretuned muffler for it. That'll save you a few ounces on the nose-- where the problem is anyway.

Wing loading won't be a problem. We fly planes like that EVERY DAY up here at high altitudes. It's normal and they fly fine-- even in the thin air.

Just keep your thumb under control and you won't rip it apart. Vertical performance should be quite exhilerating.

tianci - put it to you to want to overpower a plane like that... but i'm sure it's no problem. i had a 63FZ in my rambler. was fun for about 7 minutes, then i ran out of fuel and ditched it. not pretty... sure was fantastic to see it have unlimited vertical at half throttle where i set the EPA so i don't rip the plane to threads. i have an O.S. 52 on my new rambler and a the FZ is going into my Funtana 40 that i'm still covering.

i have a 140DZ laying around... you think i could put in the funtana instead? lol...

Common buddy.. i was asking you this question a week ago and now your asking the same question.. you answered it easy for me too.. OF COURSE YOU CAN!! Well at least i hope you can cos i just stuffed an O.S. 1.08 fsr into my Extra.. the plane you are talking about.. I picked up a Bisson Pitts for it today, which is far lighter than the stock muffler so i have gain in adding that.. I just finished off the Aileron linkages before, siliconed the fuel tank former to reduced vibration, i'll fit the tank tomorrow and connect up the fuel lines then its all go for the first run in tank.. and hopefully another 4 ground tanks before the weekend cos i want to get it up and have its maiden!!
I did however add a few re-enforcements to the firewall tonight i was a bit worried about it, despite how well built and strong it is, any engine with that much more power than recomended needs any extra beef it can get i reckon.. IMO.

But i will post how it goes tomorrow when i get a spinner (damn prop nut only works with a spinnder behind the prop []) and kick it in the guts for the first time!

Free - its easy to tell someone something but to do it yourself you need some convincing!!!

Fore - I got the TT120 for my 72" Laser 200, was about 10 lbs and I did not see it having the sort of uplines what I like, hence I was thinking of pushing my luck a bit more and see what happens. Actually, I am pretty keen to put it on a WM Super Chipmunk or the GSP Extra 300 90. Come on put the Dingo into a F90! Mine is almost ready ... I wanna see a F90 turning an 18x8 prop!!! Hahahaha ... BTW where have you been?

RC - thanks for the reply, I will think I am gonna go for it. Won't know till you try.

Hey, the TT 120 will work well on a Seagull Laser 120, the yellow one, which is a little smaller. TT 120 when propped w/ APC 17x6 should pull no less than 15 lb. static thrust.

Did you use the stock muffler rotated 90 deg in your previous laser? If so, how was the fit?

Seany ... I used the stock muffler cause I cannot get a pitts style one here in Asia, sad huh? I did not rotate it but the cown was an easy fit, came out on the side at the bottom. I could only get 9,500 RPM on the 16x6 with 15% Cool Power. No Seagull Laser's here too. Oh well ... so tempted to get it on some 65" plane.