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Old 06-27-2012, 01:09 AM   #1 (permalink)
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Default 700 High Performance 3D Gasser Helicopter

Hello all.

I did a video recently of a friends Align 700N gasser conversion. It's an interview and demo flight at the end. If you haven't seen a really high performance gasser helicopter capable of doing hard 3D, then check out this video.

TRM supplied the motor, and the pipe was by Quickdraw Engines. The two combined deliver more power than I've ever seen in a gasser. It definitely makes me want to do one. I've flown it a lot already. To get 16 minutes plus in Idle-2 is just awesome. Great for practicing.

Anyways, if you have any questions about the helicopter, just ask.

The video is currently uploading, but should be ready by mid-day June 27th.

Enjoy the video:

[ame]http://youtu.be/qPEAuQguZ3M[/ame]
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Old 06-27-2012, 11:35 PM   #2 (permalink)
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Default Thanks to Courtney

Thanks to Courtney for all her hard work on this video. She did a great job and spent a lot of time flying, shooting and editing this video. The Idea behind this video and biulding the gasser was to show that inceased performance for these machines can be had at a reasonable price, About the same price as a nitro. Perfomance is almost or equal a nitro and flight time is about twice as long. This makes it a great heli for practice and gives you lots of time to learn new manuvers at a very low cost per flight.
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Old 06-28-2012, 02:15 AM   #3 (permalink)
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Sent you a PM.


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Old 06-28-2012, 10:13 AM   #4 (permalink)
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Very nice video. How are the o rings holding up in that pipe flange without water cooling? Are you using teflon?
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Old 06-28-2012, 12:02 PM   #5 (permalink)
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Nice video. What is the cost of the complete tuned exhaust system?
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Old 06-28-2012, 02:35 PM   #6 (permalink)
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Quote:
Originally Posted by MotorRotor View Post
Nice video. What is the cost of the complete tuned exhaust system?
my thoughts as well. Please post the model and cost of that exhaust. I want one.
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Old 06-28-2012, 02:50 PM   #7 (permalink)
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http://shop.redlinemotors.us/Redline...o-RLPM-OBM.htm

Best price I could find on the pipe. They are building me one right now to try out on my Whiplash. The only thing is the flange is designed for water cooling and uses o rings. Im curious how they are holding up.

Here is another link to the manufacture:

http://quickdrawengines.com/Page_40.html

Last edited by turboracer; 06-28-2012 at 02:53 PM.. Reason: added manufacture link
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Old 06-28-2012, 02:56 PM   #8 (permalink)
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hmm. Pricey.
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Old 06-28-2012, 03:03 PM   #9 (permalink)
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Quote:
Originally Posted by Azalin View Post
hmm. Pricey.
Definatly more than a muffler. But not much more than some....


http://www.ronlund.com/rcheli/NITEXG.html
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Old 06-28-2012, 03:13 PM   #10 (permalink)
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Default Flange mount

The flange for the head pipe is mounted with a steel spacer .190" long. No orings are used. I put a small amount of Copeltite sealant on the face of the spacer and bolted it up for a leak tight seal. Its important that you us a 4" flex pipe just after the head pipe to keep a braod powerband. The pipe is from Quickdraw engines they are great people to work with and know this setup.
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Old 06-28-2012, 03:16 PM   #11 (permalink)
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Nicely done video. TRM makes good motors.
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Old 06-28-2012, 03:40 PM   #12 (permalink)
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Seems reasonable as long as it holds up. Keep us posted.
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Old 06-28-2012, 03:52 PM   #13 (permalink)
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Nice job, got to love the sound of a tuned pipe.
What gear ratio and head speed are you running?
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Old 06-28-2012, 05:28 PM   #14 (permalink)
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Default Gear ratio

I am using a 16 tooth pinion and running 2240 head speed in idle 2. The motor / pipe seems to like it there. Idle 1 head speed is 1950 and still makes very good power.
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Old 06-28-2012, 06:52 PM   #15 (permalink)
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Thanks, so 16,100 and 14,000 engine rpm. I am running the same ratio with a V2 at 15,100 - 2100 HS. relatively new engine, I have not tried any higher yet.

I did try a tuned pipe by Gizmo, on my engine it was not much better than the V2.

What length silencer is yours?

http://www.gizmomotors.com/index.php...mart&Itemid=56

Kyle Stacy tried mine out last weekend, first 3 minutes he ever flew a gasser

[ame]http://youtu.be/e4qOyGb4XvY[/ame]
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Old 06-28-2012, 07:06 PM   #16 (permalink)
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Fast

There is more to it than just setting the same length. How the pipe is designed and to work at what rpm ranges also need to be factored in to it.

Todd

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Old 06-28-2012, 07:12 PM   #17 (permalink)
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I did talk to Gizmo, it was the recommended pipe and the length was dialed in on a test stand. We may need to talk. A nice tuned pipe helps me reminisce of my two stroke motorcycle racing days.
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Old 06-28-2012, 07:12 PM   #18 (permalink)
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Turbo

Keep in mind you need to have it an external stinger on it. Not the internal one.

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Old 06-28-2012, 08:20 PM   #19 (permalink)
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Default Gas Tuned Pipe

Sweet Heli
I'm just learning this sport but have been racing gas rc boats and I believe Todd is correct about the external stinger. The internal saves from having a muffler but kills torque. The internal was designed to allow a motor to over rev and hold the HP curve out past 18500RPM but the torque numbers suffer accross the board.
Don
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Old 06-28-2012, 08:34 PM   #20 (permalink)
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Quote:
Originally Posted by turboracer View Post
http://shop.redlinemotors.us/Redline...o-RLPM-OBM.htm

Best price I could find on the pipe. They are building me one right now to try out on my Whiplash. The only thing is the flange is designed for water cooling and uses o rings. Im curious how they are holding up.

Here is another link to the manufacture:

http://quickdrawengines.com/Page_40.html
Check out the video at the 3:15 to 3:18 mark, you will notice an additional can type of muffler attached at the rear of the tuned pipe. This would be in addition to that of the tuned pipe that you show in your link.

That additional muffler would also add to the cost. That is why I asked for the price of the complete exhaust system, not just of the tuned pipe.

Does anyone know what that additional can is and what it cost? As that would definitely make the sound of the tuned pipe, at those higher rpms, to sound more pleasant to the ears.
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