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Miniature Aircraft Whiplash & Furion 6
› A few things I found with the Whiplash
11-17-2011 04:19 PM  6 years agoPost 81
hndaluvr

rrNovice

Delaware

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Mr Mel,

Great idea! I think this is the solution that i will be incorporating.

Simple, with minimal effect to CoG and overall weight. In fact, it makes for much better flexibility with strapping of packs, and i can even see where this could lead to a much wanted "slide-in" tray design... rails could be mounted where you've located your "intermediate tray" and the carbon tray could slide in much like many of the other designs on the market.

Brilliant!

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11-17-2011 05:00 PM  6 years agoPost 82
Justin Stuart (RIP)

rrMaster

Plano, Texas

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With the ESC mounted right in the middle of the frame (like in this picture), is it really able to get any cooling air? Seems to me it would be mandatory to place the ESC on the front battery tray in order to increase the amount of airflow over it. With the ESC up on the nose of the helicopter, a tail heavy CG will not be as much of a problem.

I would think that when choosing the lesser of two evils, having too long of ESC leads would be less bad than having an ESC which is on the verge of overheating.

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11-17-2011 05:16 PM  6 years agoPost 83
MrMel

rrProfessor

Gotland

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Mr Mel,
Great idea! I think this is the solution that i will be incorporating.
Simple, with minimal effect to CoG and overall weight. In fact, it makes for much better flexibility with strapping of packs, and i can even see where this could lead to a much wanted "slide-in" tray design... rails could be mounted where you've located your "intermediate tray" and the carbon tray could slide in much like many of the other designs on the market.
Brilliant!
Thanks, I'm completely happy with this, it now balances with all my packs, lightweight 4000mah 25C and heavy Hyperions 5000, no issue.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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11-17-2011 05:34 PM  6 years agoPost 84
nwmtech

rrApprentice

Bellingham, WA

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With the ESC mounted right in the middle of the frame (like in this picture), is it really able to get any cooling air? Seems to me it would be mandatory to place the ESC on the front battery tray in order to increase the amount of airflow over it.
I had the same concern some time back on my old RAVE but found that my ESC actually ran cooler in this same approximate location that up on the nose. There's very little airflow up in the nose with a tight wrap canopy and from what I could tell the main gear created a decent amount of turbulence/airflow over the ESC when it's mounted right below it.

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11-17-2011 05:44 PM  6 years agoPost 85
rcnut

rrElite Veteran

Rockford, Illinois

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Mr Mel,
Great idea! I think this is the solution that i will be incorporating.
Simple, with minimal effect to CoG and overall weight. In fact, it makes for much better flexibility with strapping of packs, and i can even see where this could lead to a much wanted "slide-in" tray design... rails could be mounted where you've located your "intermediate tray" and the carbon tray could slide in much like many of the other designs on the market.
Brilliant!
I was wondering why the "tray" system wasn't incorporated to begin with...weight? Others have them...the 7HV comes with two trays...

I remember, back in the day, when electrics were becoming popular. The batteries slid in without a tray. Then you needed a "putty knife" to undo the Velcro.

Team Miniature Aircraft
"I love the smell of Nitro in the morning!"
...Citizen 654!

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11-17-2011 06:22 PM  6 years agoPost 86
misskimo

rrElite Veteran

Alaska 17 years, before mississippi for 31y

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Huh? A thought out heli and then placed on the market with problems.

Not good

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11-17-2011 06:49 PM  6 years agoPost 87
rcnut

rrElite Veteran

Rockford, Illinois

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It worked for the test pilot (designer)...

Now it is our turn.

Team Miniature Aircraft
"I love the smell of Nitro in the morning!"
...Citizen 654!

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11-17-2011 07:52 PM  6 years agoPost 88
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I think if Bobby Watts can make the Whiplash Electric fly in it's current configuration, then everyone else can make it fly too.

Does the Futaba FBL gyro offer any sort of "trim flight" where you can set up piro compensation? I know the Vbar does. I have a Trex 550 that is pretty tail heavy due to smaller battery packs, but by running a trim flight with the Vbar, it now pirouettes perfectly flat. It's not like back in the day with flybars when you had to have the CG spot-on or else your pirouettes would be wobbly.

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11-17-2011 07:58 PM  6 years agoPost 89
MrMel

rrProfessor

Gotland

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Its just a patch, far better to have good CoG! Period, no exception.
No offense but a pro can fly anything, like dave dahl put it, its just a question how much work the fingers has to do (about vbar settings for kyle)

While for myself im screwed if its off since its all muscle memory.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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11-17-2011 08:07 PM  6 years agoPost 90
hams

rrApprentice

Ohio

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I think if Bobby Watts can make the Whiplash Electric fly in it's current configuration, then everyone else can make it fly too.
It will fly, but why would you put a handicap on the fbl system from the get go? A well setup heli will fly better, no ifs, ands or buts about it.

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11-17-2011 08:34 PM  6 years agoPost 91
rcnut

rrElite Veteran

Rockford, Illinois

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... but why would you put a handicap on the fbl system from the get go? A well setup heli will fly better, no ifs, ands or buts about it.
I totally agree! Why "tax" the electronics? Set it up right the first time.

Team Miniature Aircraft
"I love the smell of Nitro in the morning!"
...Citizen 654!

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11-17-2011 08:58 PM  6 years agoPost 92
Justin Stuart (RIP)

rrMaster

Plano, Texas

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I think you guys have got to understand that Bobby designed his helicopter to work with a particular setup. If you use the same motor, same batteries, same ESC, same servos, etc that Bobby is using, then your helicopter will balance perfectly just like Bobby intended for it to balance.

You just can't expect a manufacturer to design an electric helicopter which is able to use every possible combination of batteries, motors, ESCs, etc, and still have a pleasing form factor.

Doesn't the Whiplash Electric come with a "suggested setup" in the manual? I know the old Fury/Tempest manual set quite clearly all of the electronics that they recommended the pilot use.

I guess that's just my 2 cents.

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11-17-2011 09:04 PM  6 years agoPost 93
OICU812

rrMaster

Edson, Alberta, Canada

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Sorry Justin but mass majority of other e helis don't need specific components to balance so I disagree with that, I understand limits of what one should expect in alternate motors, packs, esc etc however having flexibility is key. In building a few other 90E machines lately they're very much flexible in moving around things to obtain cog. That doesent mean I'm put off by whiplash however I'll wait and see what unfolds here and what revisions are done.

...Once upon a time there were Nitros, flybars and frequency pins...

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11-17-2011 09:23 PM  6 years agoPost 94
hams

rrApprentice

Ohio

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It is not like we are reinventing the wheel here. My setup is a very typical 90 electric setup. The fact that I don't have a heavy castle esc, heavy regulator (i'm straight 2s) and a lighter end of the spectrum 700 size motor tells me that the whippy may be a little too component specific and could turn off many potential customers. I have no idea how the guys running a bec are even coming close to getting the cg spot on.

With that said, I really hope bobby's fix is a good one and incorporated into the production model from now on.

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11-17-2011 09:34 PM  6 years agoPost 95
dhoffack

rrApprentice

lanham, md, MHA member

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Mr. Mel,

With your mod where did you place the ecs, once you lowered the battery plate?

Thanks,

Dan

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11-17-2011 09:49 PM  6 years agoPost 96
MrMel

rrProfessor

Gotland

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Sitting on working on that right now.

Either I will place it on side inside the frame, lots and lots of space there, so thats no issue.

Or I will remove the bottom plate, cut that in half and make a "ESC" plate up where there battery plate was, that would work nice too.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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11-17-2011 10:28 PM  6 years agoPost 97
Bobby Watts

rrVeteran

Orlando, FL

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Hey guys,

OK, here's what I got, but it looks like a few of you were thinking along the same lines.

For those of you who can't seem to get your CG correct, I have made a "drill plate" that you can simply print, cut out, and use as a guide to re-drilling 3 holes on each side frame. Remove your battery tray and re- mount it with these new holes. This will allow the batteries to slide forward of the rudder servo.

I got my model to balance perfectly just now with no canopy and a 4000mah battery. Hell, I could have even made it nose heavy if I wanted

Also note that if you have some really thick battery packs, you may need to re-locate or simply remove the front 128-58 spacer right above the skids. Shouldn't hurt anything at all.

Take your time with drilling the holes and everything should line up just fine. All frames cut after this point in time will have these holes as a stock part.

And for the CG issue.... this only lowers the roll CG by about 5mm, so... cool

https://viewer.zoho.com/docs/fcYcP

Bobby

www.bobbywatts.com

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11-17-2011 10:50 PM  6 years agoPost 98
Linkdead

rrNovice

Indianapolis, IN

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Why not rotate the tail servo bay so it is horizontal. Your entire stock of left side frames can remain unmodified.

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11-17-2011 11:57 PM  6 years agoPost 99
zoomtt

rrApprentice

corona,CA

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It is more difficult to do that right now since the threads for the servo mount is embedded into the frame. You will also need to drill access holes on the other frame to install the servo.

Edsel Labao
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11-18-2011 12:16 AM  6 years agoPost 100
Linkdead

rrNovice

Indianapolis, IN

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Oh I agree that short term, drilling all the frames will be the fastest fix. MA should consider a slight redesign before cutting new right side frame stock.

The Trex 700e had the same issue with balance when it was first released. Align changed the frame design so packs could be pushed forward further until finally switching to the new radio tray.

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Miniature Aircraft Whiplash & Furion 6
› A few things I found with the Whiplash
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