RunRyder RC
WATCH
 1 page 1876 views POST REPLY
Home✈️Aircraft🚁HelicopterMiniature Aircraft Whiplash & Fury 55 › Need larger fuel tank for Spectra G... Where do you buy one? MA said they don't make one...
12-24-2010 01:13 AM  9 years ago
Topic Vote0Post 1
OneHoof

rrApprentice

Cold Spring, Kentucky

MyPosts All Forum Topic
Need larger fuel tank for Spectra G... Where do you buy one? MA said they don't make one...
I noticed the gas tank on the version one of the Spectra G is extremely small, giving only about a 20 minute flight. Is there a larger fuel tank that you guys can recommend?

Of course, with the fuel tank up front, I realize I will have to put some kind of ballast towards the back to fix the CG problem. What do you recommend to increase flight times to 30 minutes plus for the Spectra G?

I'd guess you could use a Vario fuel tank (considering they both use the Zenoah G230/240) as long as you adjust for the new CG.

I called Heli Proz south and they said MA only makes and sells one size fuel tank... which kind of shocked me.

Not really impressed MA has the fuel tank simply zip tied under the nose. I think Vario got it right by having it under the main shaft. I'd guess later versions of the Spectra changed and improve this.

Just let me know the largest fuel tank I can mount for 30 + minute flight times... and where to order it from. Thanks.

Lone Wolf
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2010 04:34 AM  9 years ago
Toadster25

rrKey Veteran

Iowa

MyPosts All Forum Topic
I have a larger fuel tank in mine. I think it is a 16 oz du-bro gas tank. I can't remember for sure anymore because it's been a few years since I built it. I had to mount it upside down to get it to fit under the canopy. I don't think you need to worry about CG because the wieght of the fuel doesn't amount to enough to bother a gasser. You could mount the engine forward facing and then you can put the fuel tank behind the engine. That way you can see the fuel level a lot easier and it is also closer to the mainshaft for better CG.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2010 05:30 AM  9 years ago
3dwanabe

rrVeteran

Huntersville, NC

MyPosts All Forum Topic
On the last Spectra I had, the engine would stumble when transitioning from upright to inverted and it would almost quit during tic-tocs. To fix this, I added another tank behind the engine and plumbed it so that the front tank was the header and the rear tank was the main. I only ran the helicopter for 10-15 minutes at a time so the front tank was always full. Another benifit was that the cg change was minimal since the rear tank was so close to the main shaft. If you are planning to fly 30 minutes, you should have at least 10 minutes in reserve using 2 stock tanks.

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-26-2010 01:09 AM  9 years ago
Carey Shurley

rrElite Veteran

Orlando, FL - USA

MyPosts All Forum Topic
Not really impressed MA has the fuel tank simply zip tied under the nose
As you probably saw from those pics, depending on which way you turn the motor you can mount the tank on the bottom plate either behind or in front of the motor. It was designed to support either.

You can also plumb a larger tank in the front of the model or as in the photos plumb multiple tanks to increase capacity.

The zip tie approach goes way back and was common with the Fury, Spectra and Stratus models (although the stratus had a custom molded tank). Made it very easy to remove/replace the tank if needed.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-27-2010 03:18 PM  9 years ago
OneHoof

rrApprentice

Cold Spring, Kentucky

MyPosts All Forum Topic
X-Cell... is the same as ION-X, Stratus and Spectra G. I think?
I used to own a few Ion-X's and loved they way they flew. I just hated that the flights were only about 5 to 7 minutes... The longer flights were a nightmare to recharge because my charger would cut off every 10 seconds (but that's another story).

I noticed the X-Cell name on the ION-X, Stratus and the Spectra G. Although, I've never looked this up... I presume it is pretty much the X-Cell airframe etc. In other words, I am guessing these three differently named helicopters are all the X-Cell, but in the form of an electric, nitro and a gasser.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-27-2010 03:20 PM  9 years ago
OneHoof

rrApprentice

Cold Spring, Kentucky

MyPosts All Forum Topic
Spectra G... new to me. Seems like a nice bird.
Anyhow, I started off in gassers with the Vario Benzin Acrobatic... which is like the BMW of gassers. Very well engineered and it flies GREAT. Of course, after six glorious months of flying my Vario... a yet to be explained radio lock out glitch (possibly caused by extreme humidity in Louisiana) with my JR X9503 caused my $3,000 Acrobatic to fly away to a horrible crash.

I sold the surviving engine and frame for just $350... and threw in about 12 Futaba servos, a JR770 gyro and other things to sweeten the deal. I had already sent money to Joe at Vario to get a new Acrobatic built... than about a week later the man who'd bought my crashed bird told me of his Spectra G that he'd sell me for a really good price.

Anyhow... about 3 months later after selling my last remaining ION-X, washer and dryer... and a few other things. I finally got the seller the last hundred dollars. The Spectra G looks to be nicely designed too. I like the push pull servo arm controls.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-27-2010 03:33 PM  9 years ago
OneHoof

rrApprentice

Cold Spring, Kentucky

MyPosts All Forum Topic
I'll figure out a way to get a larger gas tank on Spectra...
It is just that the gas tank is very tiny... and I am used to 30 to 35 minute flight times with the Vario. Of course, the Spectra had a tooth missing on the "crown"/tail rotor gear (above main gear) and the extra tail rotor bracket was broken. I'd guess that's why the never Spectra versions moved it onto the main frame.

So, I'll give my honest assesment to compare the Vario and Miniature gassers. Of course, I am probably a little biased towards the Vario because I've seen how well they're built. Btw, the man who bought the crashed one has had it flying for months now.

But then again, if the Spectra flies as nicely as the ION-X, I am sure I will really like the MA gasser too. I just hate that the American made MA heli's blades spin the wrong way like Japanese helicopters. I am a full scale helicopter pilot and American helicopters are supposed to spin counter clockwise!

Regardless, I plan to only fly gassers from now on because they don't smoke (heli stays clean-no nitro slim-residue), fly for so long (20 to 35 minutes), ease, cheap price of buying 87 octane gasoline, they are larger machines that can handle the wind and autorotate VERY well.

So, however the "fly off" competition goes, both the Miniature and Vario helicopters will be staying with me in my home hangar for a long time. Once you go gasser... you never go back!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-27-2010 03:34 PM  9 years ago
Carey Shurley

rrElite Veteran

Orlando, FL - USA

MyPosts All Forum Topic
I like the push pull servo arm controls.
must be an aftermarket modification, the "out of the box" Spectra doesn't use a push-pull servo control arrangement
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-27-2010 03:44 PM  9 years ago
OneHoof

rrApprentice

Cold Spring, Kentucky

MyPosts All Forum Topic
Getting comfortable with higher autorotations.
So, when I get back next year I plan to fly the Miniature to see how it compares to the Vario. I'm sure it will fly and autorotate very well too. It's blades are wide chord... and almost as long a the 725mm blades on the Vario. So, with the help of a new soldier just stationed at Ft. Polk, whom is very knowledgeable about rc heli's, I plan to start my first attempts at higher altitude autorotations with the Spectra.

I have only done one real one with the Vario (caused by me pulling the vent tube too far, causing a crimp). I hesitated when the engine sputtered and gargled... and I didn't take pitch out as fast as I should have to set up a good auto. Fortunately, those high inertia 725mm blades on the Vario saved the day. I had a hard landing that cracked the skid struts at the bottom, and bent the aluminum tail fin, but other than that, it was still flyable with some super glue, zip ties... til the replacement parts came.

I've literally done thousands of autorotations with numerous heli's on RealFlight, but am afraid of crashing with a real one. My logic used to be... if I can do it on the simulator, I can do it in real life. But the reality was since I'd never done a real (high altitude... I do hovering autos all the time) autorotation, I hesitated to initiate one when my engine sputtered in real life and I had a hard landing because of that hesitation.

Whereas if I did high altitude autos all the time... I would have been comfortable enough to have lowered collective and just done one for the fun of it when the engine sputtered. But because I was afraid of doing a real auto... I hesitated... "um... did my engine just quit?!! OMG... I think it!!! Auto... Auto... AUTO!!!"

Anyway... my new rc buddy explained he can adjust my throttle hold to a point where the blades spin a little faster, giving more margin of error for practice autos. So, early next year when I get the tail gear and TR bracket on... after some good flights. I plan to start doing higher altitude (non hovering) autorotations at my flying field (Honor Field). So, wish me luck.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-27-2010 05:24 PM  9 years ago
OneHoof

rrApprentice

Cold Spring, Kentucky

MyPosts All Forum Topic
Push pull... pulley thingies... for swash control. "what-cha ma call its"!
Quote
--------------------------------------------------------------------------------

I like the push pull servo arm controls.
--------------------------------------------------------------------------------
must be an aftermarket modification, the "out of the box" Spectra doesn't use a push-pull servo control arrangement[quote]
--------
Carey Shurley,

Sorry for my ignorance. I guess I called it the wrong thing. After looking at it... I'm not sure what to call it. They are pushers and pulley... "thingies".

I didn't mean a push pull servo... but instead a network of pulleys... going to the swash... there is a series of push and pull... "what-cha ma call its".

My Vario... and other heli's don't have this. The servos linkages go straight into the swash.

Somebody told me in a crash... these pusher... pulley things can save the servo.

You can see what I'm talking about in the photos 3dwanabe provided.

Sorry for my lack of technical nomenclatures for that particular type of swash control. What is the correct term for pusher/pulley systems like that?

Thanks for the info. I am excited to get my Spectra flying in the next couple of weeks. I'll let you know how it goes. ttys

Lone Wolf

I tried to cut and paste, but might not work... If not, scroll up to 3dwanabe and you will see the "push, pulley" thingies I'm talking about.

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-27-2010 05:44 PM  9 years ago
Chris Bergen

rrElite Veteran

cassopolis, MI USA

MyPosts All Forum Topic
umm.. Bellcranks? Chris D. Bergen
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-27-2010 07:18 PM  9 years ago
OneHoof

rrApprentice

Cold Spring, Kentucky

MyPosts All Forum Topic
Thanks Chris!

That's why I love this hobby. Even after two years I still learn something new all the time.

Btw, are you related to any of the Bergen family that created the Bergen helicopters?

I am working to add a Bergen to my gasser helicopters. I've heard good things about Bergens too.

Again, thanks for giving me the correct nomenclature of "bell cranks". ttys

Lone Wolf
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1876 views POST REPLY
Home✈️Aircraft🚁HelicopterMiniature Aircraft Whiplash & Fury 55 › Need larger fuel tank for Spectra G... Where do you buy one? MA said they don't make one...
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Saturday, February 22 - 4:06 am - Copyright © 2000-2020 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online