KojakDave

My Feedback: (4)

Hi,

I've already started a thread on the subject [link=http://www.rcuniverse.com/forum/m_4388015/tm.htm]HERE[/link], but have narrowed my choices down and would like to see everyone's opinion in a poll. I know there are many other excellent choices, but these fall in my price range and I actually prefer a 2 stroke to a 4 stroke for right now. Thanks for the input.

Dave

Iflyglow

My Feedback: (79)

I just picked up the H9 Hell Cat tonight. I fully intend to put a TH .75 in it. I have been flying a TH .75 in my GP Shoestring, and love it. I have never ever "knock on wood" had a dead stick, and I am on my 4th gallon through it this year. It still has the same used #8 plug that I put in it to break it in.

JAYKOH

My Feedback: (13)

If you can afford it, put a Saito 100 on it

AERORICH73

I suggest you consider a Saito engine for your P-47 also. You will be pleased with its performance, and quality of product. Maybe the FA 125 would work well depending on the models final weight.

Iflyglow

My Feedback: (79)

There is nothing wrong with the Tower Hobbies .75 It is a real stump puller of an engine, and they run extremely reliable. They are every bit as reliable as a Saito. I am on my 4th gallon this summer with not one flame out or dead stick, and my engine cost 1/3rd of a Saito.

Flyboy Dave

My Feedback: (21)

I voted for the Super Tiger 90....a great engine, at a great price.

FBD.

Sport_Pilot

You need a four stroke for a scale model. A two stroke just won't sound right. A Saito 1.00 would be good. Or if you need the nose weight a TT .91 FS.

KojakDave

My Feedback: (4)

I appreciate that the Saito is a great engine, but it is a little too expensive for me. These are the engines I am considering buying. If you would like to offer an opinion on one of them, please do.

Thanks

Dave

Sport_Pilot

Then buy a used TT .91, they sell cheap because they are not popular, but they run good if you know their quirk's. Those quirk's are pretty minor and well documented here. Course they are heavy so, unless the model is going to need some weight up front, it will add a few ounces. Though not much more than a ST. 90.

KojakDave

My Feedback: (4)

I don't buy used engines any more after paying for someone else's bad break-in.

Dave

Cyclic Hardover

My Feedback: (3)

G90

bob27s

My Feedback: (19)

I would go with the ST 90 also.

KojakDave

My Feedback: (4)

Thanks for all of the input guys.

Dave

Iflyglow

My Feedback: (79)

How much more power does the ST .90 have over the Tower .75. My old Tower .75 is on the 4th gallon and I have never had a dead stick. The throttle transition is so smooth. I hate to go to a .90 and have crappy transition.I have just ordered another Tower .75 last night for my H9 Hell Cat, and I could still change the order this moring.

KojakDave

My Feedback: (4)

Good question...is there anyone who's tried both?

Dave

Iflyglow

My Feedback: (79)

Bax at Great planes says the benchmark rpm for a .75 w/13-8 is 10,000+ or 12,000 with a 12-7. I have only flown with 12-7's and 12-8's (Shoestring). I ran it with a 13-6 at the tail end of the break in and it was pretty strong. I did not tach it. This engine runs like a Swiss watch, and I am scared to try something with questionable midrange. I have tached mine in the Shoestring running a 12-8 APC & True turn 3" @ 11,400 on 10% WC with a Bisson Pitts. I have also tached the 12-7 with the same setup @ 11,900 richened for flight. I do not push the engine very hard sine it is only pulling a 7lb "Shoestring".

Iflyglow

My Feedback: (79)

FBD,
I thought you really liked the TH .75. Howcome you picked the ST .90 over the TH .75. Does the .90 run as sweet as the .75. I hear nothing but crap about the ST's midrange. My towers midrange is real sweet.

Cyclic Hardover

My Feedback: (3)

Thing about warbirds is midrange is not an issue with me. My throttle is full open from start to finish.[X(]

rainedave

My Feedback: (1)

Are Tower's weight figures for the engines they sell totally inaccurate? According to their figures: G90 - 27oz; TT .91 - 25.7oz; TH .75 - 23oz. Why is the TT .91 considered a brick and the G90 deemed lighter?

Iflyglow

My Feedback: (79)

The weights you listed include the factory muffler. The bare engine weights are quite a bit lighter, and the St .90 has a very heavy muffler. The TT .91 listed is a four cycle, while the rest you listed are 2 strokes.

Flyboy Dave

My Feedback: (21)

They are two different animals....the S.T. .90 with it's lower RPM, and it's ability
to turn bigger props is the better set-up for War-birds in MHO.

The Tower .75 is a screamer....more suitable to speed planes.

Again....the Tower .75 is not suitable for 3D, or helicopter use.

FBD.

Razor-RCU

My Feedback: (50)

ST G-90

What Dave said--- I have had both and concur

Iflyglow

My Feedback: (79)

Well, I hope I made the right decision. The Tower .75 will be here tomorrow. Mine is going in the Hell Cat not the P-47 but I would assume they fly about the same. I am hoping to run a 13-6 or 13-8 like Bax from GP said. I could return the TH .75 and Bission and get the ST .90 though.

Here is a post from Bax @ GP

With an APC 13 x 8 propeller, we'd expect to see the Tower Hobbies .75 engine to turn in the high-10,000's. Any idle below about 2,600 RPM is considered 'good'.

We've also run them with an APC 12 x 7 prop and seen 12,000 RPM at peak.

We generally use the 13 x 8 propeller when we run the engine on our test stand. It tunes quite well when using that prop with a 10% nitro fuel.



< Message edited by Bax -- 3/3/2006 10:55:23 AM >

Sport_Pilot

I own both and they weigh about the same without muffler. The G-90 is a tad stronger turning a 14-6 APC at almost 11,000 on 10% nitro fuel, the TT will turn 10,600 on 25% nitro fuel and over 10,300 with 15% nitro. But sounds more realistic. Both have good midranges, but the TT .91FS is almost at full RPM at 3/4 throttle. So the G90 has more liner throttle, unless you limit the throttle travel on the TT. Sound of engine aside, both are good choices.

KojakDave

My Feedback: (4)

I just wanted to thank everyone for their input. I just placed my order for a ST G90...if it doesn't run well I will e-mail everyone who voted for it everyday until they block my e-mail address
Thanks,

Dave