3DAP

Looking for gasser for 9 to 10 lb plane with 2 to 1 vertical. G20 does not seem to be enough, or maybe with a tune pipe. Anyone running new 26ei or 26 with a tune pipe? Also where do you get header and tune pipe for 26/26ei??

Thankx 3DAP

Prapan

G26 is heavy in my view and used to run it. Engine was great. I would recommend MVVS 26 for that 9-10 lbs plane.

rcdude7

My Feedback: (264)

I think someone here gave the numbers for a tuned exhaust G-26. If I remember right it was quite a boost in power.

These guys have the tuned pipe and header needed. http://www.macspro.com/tunedpipes.asp

rcdude7

My Feedback: (264)

Here's the thread you need to check out: http://www.rcuniverse.com/forum/m_11...%2Cpipe/tm.htm

blkbird68

My Feedback: (19)

I have an RCIgnitions G-26 with a WT-257 carb. Mueller header and a homemade canister exhaust system turning a Skorepa E 18x6 prop at 10100RPM. This package is on a 10 3/4 pound 25% Ultimate bipe. Vertical is unlimited but not 2 to 1.

FYI. In my tests a Mueller header gave about 200rpm more than a macs header of equal length.

arobatx

The G26 with Macs products (or equivilant) header and tuned pipe setup will spin a Mezjlik 18x6 at 10000rpm. Same prop on a decent aftermarket in-cowl muffler spins at about 9000rpm. EI makes no more power at all over the OEM ignition. It is easier to start however, and much lighter, so your over all power to weight is better I fly my EI and lightened 26 on a Funtana X100, 10lbs AUW, and I have no problems with IMAC or 3D maneuvers at this weight....and after all the mods, I am still in it for far less than the cost of an MVVS or equivilant.

Chad

karolh

For downright best bang for the buck, an RC Ignitions converted G26 is right up there with the best of them, plus it comes with a lifetime warranty on all workmanship and the ignition system.

Karol

AA5BY

What is 2 to 1 vertical?

Michael G

My Feedback: (1)

Something like the plane weighs 10 pounds and the engine produces 20 pounds of thrust. Plane could go vertical at slightly over 50% throttle.

3DAP

Chad,

What is the difference between stock ei ignition and rc ignitions 26? Do they put a ch ignition in it or what?
Is there anything wrong with ei stock ignition? 10000 with an 18 x 6 is probably close to 2 to 1. What are you running your mixture at? I have a Brison 3.2 on a aeroworks 27% ultimate and it is awesome, getting 28 lbs of thrust for a 15 lbr, running 70 : 1 Motul synthetic.Will the zenoah run this lean and still survive?
3DAP

MSS999

Having just ordered one of the RC Ignitions G26, I am happy to answer this one.

The standard G26ei uses the Zenoah ignition system the same as a G20ei. There's quite a lot of stuff written on RCU about it - basically, it works well but is very power hungry so you need to install a relatively large capacity battery in the model.

The RC Ignitions G26 ei (also called the G26 Lite) is a standard G26 but with a CH HD ignition system mounted in place of the coil and rotor at the back of the enginee. So the engine is self-contained rather than having a small external box containing the igntion module. Ralph also lightens the engine by removing all the extra metal that is there for non-RC applications and sets it all up to run flawlesly. The CH ignition only draws a few hundred milliamps so you only need to install a small (lightweight) battery of around 800mA. The RC Ignitions G26 weghs less than 3 pounds RTF.

What surprised me was that despite all the work Ralph does on the engine, it costs only $25 more than the price of a standard G26ei from one of the online retailers.

Basically, you get an engine that has been updated and lightened by the master of all things Zenoah, with arguebly the best and certainly the most popular RC Ignition setup available for very little extra money. And, on top of all that, you can go back to the man for great service anytime there are any issues and he is a really nice person to deal with.

Hope this helps.

Maninder.

Tired Old Man

My Feedback: (1)

Someone once instilled the 2-1 power to weight ratio in everyone's head as the magic number required for succesful 3D flight. It was a fallacy then and is typically a fallacy now. Unfortunately there are many gullible enough to believe that ratio is necesary for good 3D. Those are generally the same people that could not fly a 100", 30-40 pound P-51 with a G-62 in a scale manner.

If you want a true 2-1 then be prepared to install a very large engine on a very small plane. Better to lower the wing loading and all up weight with a lighter engine. Bigger engines on small planes are never the answer. Go with the Cunningham 26 for the above reasons. By the time you add the weight of a pipe and header you have negated the gain in rpm obtained from them. Especially in a small plane with low wing area.

The next solution is to spring for a larger plane with more wing, keeping the weight down and going with an engine size recommended by the manufacturer. Those combinations usually work out pretty darn well. By the time you've spent the money chasing that power to weight ratio for a 60" span plane you could have already done that.

blkbird68

My Feedback: (19)

Bull!!! On my latest G26 powered plane, the mueller header weighs 2oz and the pipe weighs 2.85oz. adding the coupler makes it heavier than a bisson side mount inverted muffler by about an ounce. The best I ever turned on the bisson muffler was 8800RPM. One ounce is a small price to pay for 1200+RPM

blkbird68

My Feedback: (19)

BTW, the canister system I have in my Ultimate(yes I said IN my Ultimate) is relatively heavy. This is due to the need to protect the inside of the plane from the heat. So it is about 6oz heavier than a conventional muffler. But even in a 60" biplane the RPM gain was well worth the extra weight.

tkg

My Feedback: (1)

[X(][X(] You mean follow instructions????

G-Pete

10100RMP with a 18x6 prop that equalizes to 32 pounds of thrust - I like to see a Zenoah turning over 9K...If you have one show me a video

Happy landings

skip1320

Once your 2-1 or close it spoils fun for anything less,been there done that!

karolh

Assuming sea level as datum, a CF 18x6 prop turning 10,100 rpm develops approx. 22.5 lbs of static thrust.

Karol