SFR2 Speed Fuselage for TDR

[mkovalcson]

I had a similar issue.
I got a a sheet of copper and cut it to fit.
I trimmed it in a curve at the top after I took this picture so it could rotate.

Kontronik does not recommend standoffs, so you could probably bend a piece of copper however you like.

[RJ]

That looks professional Mark, especially with the Banshee label heatshrink and fuseholder. Thanks for the Kosmik info.

I see some are going to put the Kosmik fuse inline on one of the flexible battery cables instead of the lug. Sounds like a good solution too.

[mkovalcson]

Originally Posted by RJ

That looks professional Mark, especially with the Banshee label heatshrink and fuseholder. Thanks for the Kosmik info.

This is what the final result looks like.
I had a 100 red, 100 black and 300 yellow custom shrink made up.

[mkovalcson]

I may need to make up some Henseleit shink wrap at some point.

Especially if I end up with 3 different Henseleit helis

.

[RJ]

I think Henseleit heatshrink would be very cool.

[Inverse]

Sorry to interrupt the heat shrink love-in but out of curiosity, why are the speed fuselages still running a tail fin? Wouldn't this also be a cause of drag and turbulence?
A small standoff or skid on the underside of the boom would prevent any issues with the tail rotor touching the ground.

[RJ]

Originally Posted by Inverse

Sorry to interrupt the heat shrink love-in but out of curiosity, why are the speed fuselages still running a tail fin? Wouldn't this also be a cause of drag and turbulence?
A small standoff or skid on the underside of the boom would prevent any issues with the tail rotor touching the ground.

Shhhhhhhhh! Speed secret! LOL. The stock tail fin is just for practice. The competition version gets the streamlined stinger as on the 2012 SFR1.

And now, back to heatshrink...

Regards,
Rick

[JRAY]

In my best Lee Corso voice.....Not so fast my friend..............

Extending on that, I wonder how much, if any, a cap for the end if the boom would help.


Ok, now we can go back to the shrink wrap.

[RJ]

I think covering the tail gearbox would help, that's why I left the tail boom long on SFR2, but I expect that air is exiting out the tailboom below the gearbox, so I think I would want to leave that open. A streamlined cover with air exit holes could be an improvement though...

[JRAY]

Originally Posted by RJ

I think covering the tail gearbox would help, that's why I left the tail boom long on SFR2, but I expect that air is exiting out the tailboom below the gearbox, so I think I would want to leave that open. A streamlined cover with air exit holes could be an improvement though...

Yeah, that could definitely work.

[Mercuriell]

Mark's great heat-shrink idea moved to add-ons to stay on topic

Here's some pics of my SF2 - looks great Rick

ANd a quick and dirty video of test - no I didn't know the gardener was gonna walk through the back yard

[RJ]

Hi John,

Nice to see it finished and flying. It looks great! The orange windscreen and green comet look very visible. Thanks for posting the photos and video. Is it going to make it to the Australian Speed Cup?

Regards,
Rick

[Mercuriell]

Thanks Rick, well it nearly had a wipe out this arvo. Flew beautifully and on 2nd flight lost cyclic and it careered down! With a lot of luck landed on a blade and spared the fuze thank goodness. Funny, crash was largely due ro having a Scorpion BUG, switched this on to fire up the FBL then FORGOT to flick the inline switch I have in the BEC lines. Anyway took off flying only on the BUG which bugged out after a couple of runs leaving only the barest of control. The BUG lipo must have been pretty flat though wasn't flashing red funny how a backup nearly ended in disaster!

[RJ]

Ohhhhhhhhh, sorry to hear about that! Sounds like a routine needs to be in place (I guess there will be one now). Hope you can get it back together soon.

Regards,
Rick

[TommyBear]

John,
In my Uvular, I wire the BUG so that the power from the BEC will always be on even if I forget to turn on the BUG.
Please don't use the BUG with HV BLS servos as it cause brownout the moment I turn it on.

[Mercuriell]

Originally Posted by TommyBear

John,
In my Uvular, I wire the BUG so that the power from the BEC will always be on even if I forget to turn on the BUG.
Please don't use the BUG with HV BLS servos as it cause brownout the moment I turn it on.

The BUG was being used with 451s, I use the Ultraguard with HV servos. Rickmis right, just need a new startup/shutdown procedure. I mentioned it just as an illustration as how increased complexity caused by "fail-safes" such as backup and fuses can in themselves cause disaster! Luckily the SF2 is unscathed

[helicraze]

I think the dx9 allows you to set checklist when turning on.

Would be a cool feature to have

[JWILL]

I think the real culprit was the inline switch for your bec.

[Vinger]

Buffer devices or packs should be last on and first off, then you will not have this scenario. Glad you saved it.

[Mercuriell]

Originally Posted by Vinger

Buffer devices or packs should be last on and first off, then you will not have this scenario. Glad you saved it.

Good advice - strange heli - lot of work getting packs and fuze mounted - just plain forgot

Jan's advice about no buffer and rely on BEC keep ringing in my ears - KISS principle