taller battery holder/clips for Ventus 2?

[Frank[_12_]]

I'm considering the addition of a PowerFlarm and probably a
transponder (TTG21/22) to my Ventus 2bx, and am wondering if anyone
has modified the forward and/or aft battery restraints to accommodate
taller batteries. The restraints in my ship are set up for the
typical 7-9AH SLA with dimensions 5.94"L x 2.56"W x 3.94"H. The next
standard size up (literally) has the same length and width dimensions
but a height of 4.61". There is plenty of room for the additional
3/4" or so, but current molded restraint clips won't work.

Does Schemp-Hirth make molded clips/restraints that will fit the
taller batteries, or am I on my own?

Regards,

Frank (TA)

[Mike the Strike]

On Oct 1, 4:05*pm, Frank > wrote:
> I'm considering the addition of a PowerFlarm and probably a
> transponder (TTG21/22) to my Ventus 2bx, and am wondering if anyone
> has modified the forward and/or aft battery restraints to accommodate
> taller batteries. *The restraints in my ship are set up for the
> typical 7-9AH SLA with dimensions 5.94"L x 2.56"W x 3.94"H. *The next
> standard size up (literally) has the same length and width dimensions
> but a height of 4.61". *There is plenty of room for the additional
> 3/4" or so, but current molded restraint clips won't work.
>
> Does Schemp-Hirth make molded clips/restraints that will fit the
> taller batteries, or am I on my own?
>
> Regards,
>
> Frank (TA)

I addressed this problem in my Discus 2 by making the front battery
dedicated to the transponder and the two main batteries in the
compartment behind the seat for the flight instruments and radio. I
don't even use the fin-mounted battery. If you have the same
arrangement, you should have plenty of capacity with the available
slots, but you might want to spread the load.

Mike

[Steve Koerner]

For my ASW-27 I made humped steel brackets to replace the standard
flat brackets that go across the top of the Schlicher battery box.
My plan was to transfer the thumbscrews from the old bracket to the
new. However, I found that the short original thumbscrews were
difficult to access around the new tall bracket. That led me to
design a tall captured thumbscrew that I turned on the lathe and
knurled. Works great. Using 10 AH batteries now.

Steve Koerner
www.wingrigger.com

[Steve Koerner]

On Oct 1, 4:28*pm, Steve Koerner > wrote:
> For my ASW-27 I made humped steel brackets to replace the standard
> flat brackets that go across the top of the Schlicher battery box.
> My plan was to transfer the thumbscrews from the old bracket to the
> new. *However, I found that the short original thumbscrews were
> difficult to access around the new tall bracket. * That led me to
> design a tall captured thumbscrew that I turned on the lathe and
> knurled. *Works great. *Using 10 AH batteries now.
>
> Steve Koernerwww.wingrigger.com

My reply, of course, applies to Schliechers and probably isn't much
help to the OP with a V2.
Steve

[weersch[_2_]]

Hi Frank
In my V2C I just press the taller 10.5AH battery in the front holder.
The 2 retention clips stay spread out and stay on the side.
But the battery cannot go anywhere even with the restrains not being
on top (as they are supposed to be with the 7AH battery)
My 2 main batteries are still the 7AH.
But this winter I am going to fabricate a new taller bracket to also
accommodate the taller 10.5AH batteries in the main compartment.
Due to CofG, I am not using the tail battery
In the past I have been running the 7+7+10.5AH with a old Terra
transponder, an old GPSMAP195, an old LNAV (all power hogs) with no
problem.
Currently I have the TT21, IPAQ310, LNAV+Etrex.
This setup uses even less power.
I am waiting for the PowerFlarm, but that is a minimal power add-on.

Having separate power circuits for your (modern) transponder is just
adding unnecessary wiring complexity to your system.
You can have all 3 batteries switched in parallel and just have 1
power feed.
The 2 7AH main batteries are switched together in any way (at least on
my ship)
It is better to invest your effort in a good fat power bus running
from your batteries to your power distribution panel.
In my ship I replaced the original power bus (ground of all batteries
running through 1 wire of a 25 wire printer cable) by a fat 12 AGW
Tefzel cable.
Since then I don't have power supply problems anymore, like
unexplainable premature voltage drop.
Of course you have to charge the batteries separately.
Hans Van Weersch (3U)

[weersch[_2_]]

By the way, the TT21 fits very nicely in the bottom pod under the tilt
panel on my V2C.
I did the installation myself and it was very easy.
Your V2B should have the same fuselage.
Hans Van Weersch (3U)

[Peter Purdie[_3_]]

Turbo/self-launch equipped Ventus 2 normally have a 17AH battery under the
panel, but as it is bonded in I guess it's a factory install, or a
significant bonding task. You shuoklbe be able to carefully cut the
existing clips and make an insert to extend them, but as it is a mod then
it depends what sort of CofA system you are on how annoying the paperwork
is (if you do it fully legally). The US 'Experimental' category has its
advantages.

I concur with Weersch - the bottom pod is ideal for the TRIG TT control
unit, and the main box can go back behind the wheel box to make the
antenna co-ax run as short as possible (desirable for RF loss).

At 05:43 02 October 2010, weersch wrote:
>By the way, the TT21 fits very nicely in the bottom pod under the tilt
>panel on my V2C.
>I did the installation myself and it was very easy.
>Your V2B should have the same fuselage.
>Hans Van Weersch (3U)
>
>

[hotelalpha]

On Oct 2, 12:08*am, Peter Purdie > wrote:
> Turbo/self-launch equipped Ventus 2 normally have a 17AH battery under the
> panel, but as it is bonded in I guess it's a factory install, or a
> significant bonding task. *You shuoklbe be able to carefully cut the
> existing clips and make an insert to extend them, but as it is a mod then
> it depends what sort of CofA system you are on how annoying the paperwork
> is (if you do it fully legally). *The US 'Experimental' category has its
> advantages.
>
> I concur with Weersch - the bottom pod is ideal for the TRIG TT control
> unit, and the main box can go back behind the wheel box to make the
> antenna co-ax run as short as possible (desirable for RF loss).
>
> At 05:43 02 October 2010, weersch wrote:
>
> >By the way, the TT21 fits very nicely in the bottom pod under the tilt
> >panel on my V2C.
> >I did the installation myself and it was very easy.
> >Your V2B should have the same fuselage.
> >Hans Van Weersch (3U)

I owned a V2c. I also dedicated the front battery for the
transponder.
Transponders don't play well with others and don't like sharing!
The two other batteries were more than enough for a radio, SN10,
and PDA.

Sean

[Tim Taylor]

On Oct 1, 5:05*pm, Frank > wrote:
> I'm considering the addition of a PowerFlarm and probably a
> transponder (TTG21/22) to my Ventus 2bx, and am wondering if anyone
> has modified the forward and/or aft battery restraints to accommodate
> taller batteries. *The restraints in my ship are set up for the
> typical 7-9AH SLA with dimensions 5.94"L x 2.56"W x 3.94"H. *The next
> standard size up (literally) has the same length and width dimensions
> but a height of 4.61". *There is plenty of room for the additional
> 3/4" or so, but current molded restraint clips won't work.
>
> Does Schemp-Hirth make molded clips/restraints that will fit the
> taller batteries, or am I on my own?
>
> Regards,
>
> Frank (TA)
Frank,

To answer your question directly. No factory replacenment that I know
of, but pretty easy to mod the factory box. Either cut and extend the
current tabs or put outside tabs and use a bungie doughnut.

[jcarlyle]

Sean,

I own the LS8-18 you used to fly. I have to disagree with your
statement "Transponders don't play well with others and don't like
sharing".

I replaced the Terra TRT250D and the Ameri-King AK-350 you had with a
Trig TT21. The Trig, an SN-10, a Becker AR-4201, a Volkslogger and an
iPAQ 3950 all run quite happily for up to 6 hours off one 9 AH
battery. As you know, there is another 9 AH battery ready to be
switched in as a spare, but I've never needed it.

-John

On Oct 2, 9:46 am, hotelalpha > wrote:
> I owned a V2c. I also dedicated the front battery for the
> transponder.
> Transponders don't play well with others and don't like sharing!
> The two other batteries were more than enough for a radio, SN10,
> and PDA.
>
> Sean

[hotelalpha]

On Oct 2, 7:35*am, jcarlyle > wrote:
> Sean,
>
> I own the LS8-18 you used to fly. I have to disagree with your
> statement "Transponders don't play well with others and don't like
> sharing".
>
> I replaced the Terra TRT250D and the Ameri-King AK-350 you had with a
> Trig TT21. The Trig, an SN-10, a Becker AR-4201, a Volkslogger and an
> iPAQ 3950 all run quite happily for up to 6 hours off one 9 AH
> battery. As you know, there is another 9 AH battery ready to be
> switched in as a spare, but I've never needed it.
>
> -John
>
> On Oct 2, 9:46 am, hotelalpha > wrote:
>
> > I owned a V2c. *I also dedicated the front battery for the
> > transponder.
> > Transponders don't play well with others and don't like sharing!
> > The two other batteries were more than enough for *a radio, SN10,
> > and PDA.
>
> > Sean

Geesh! Does everyone have to disagree on RAS :)

[jcarlyle]

On Oct 2, 11:52 am, hotelalpha > wrote:
> On Oct 2, 7:35 am, jcarlyle > wrote:
>
>
>
> > Sean,
>
> > I own the LS8-18 you used to fly. I have to disagree with your
> > statement "Transponders don't play well with others and don't like
> > sharing".
>
> > I replaced the Terra TRT250D and the Ameri-King AK-350 you had with a
> > Trig TT21. The Trig, an SN-10, a Becker AR-4201, a Volkslogger and an
> > iPAQ 3950 all run quite happily for up to 6 hours off one 9 AH
> > battery. As you know, there is another 9 AH battery ready to be
> > switched in as a spare, but I've never needed it.
>
> > -John
>
> > On Oct 2, 9:46 am, hotelalpha > wrote:
>
> > > I owned a V2c. I also dedicated the front battery for the
> > > transponder.
> > > Transponders don't play well with others and don't like sharing!
> > > The two other batteries were more than enough for a radio, SN10,
> > > and PDA.
>
> > > Sean
>
> Geesh! Does everyone have to disagree on RAS :)

Ah, Sean, I'm just grumpy because you didn't leave any of your
exceptional flying skill in the LS8!

-John

[Frank[_12_]]

On Oct 2, 1:43*am, weersch > wrote:
> By the way, the TT21 fits very nicely in the bottom pod under the tilt
> panel on my V2C.
> I did the installation myself and it was very easy.
> Your V2B should have the same fuselage.
> Hans Van Weersch (3U)

Hans,

Thanks for the input - especially the idea for putting the control
head in the bottom pod. That really makes my day, as I was not having
much luck finding room for it on my regular panel.

Regards,

Frank (TA)

[Frank[_12_]]

On Oct 2, 12:31*pm, jcarlyle > wrote:
> On Oct 2, 11:52 am, hotelalpha > wrote:
>
>
>
>
>
>
>
>
>
> > On Oct 2, 7:35 am, jcarlyle > wrote:
>
> > > Sean,
>
> > > I own the LS8-18 you used to fly. I have to disagree with your
> > > statement "Transponders don't play well with others and don't like
> > > sharing".
>
> > > I replaced the Terra TRT250D and the Ameri-King AK-350 you had with a
> > > Trig TT21. The Trig, an SN-10, a Becker AR-4201, a Volkslogger and an
> > > iPAQ 3950 all run quite happily for up to 6 hours off one 9 AH
> > > battery. As you know, there is another 9 AH battery ready to be
> > > switched in as a spare, but I've never needed it.
>
> > > -John
>
> > > On Oct 2, 9:46 am, hotelalpha > wrote:
>
> > > > I owned a V2c. *I also dedicated the front battery for the
> > > > transponder.
> > > > Transponders don't play well with others and don't like sharing!
> > > > The two other batteries were more than enough for *a radio, SN10,
> > > > and PDA.
>
> > > > Sean
>
> > Geesh! *Does everyone have to disagree on RAS :)
>
> Ah, Sean, I'm just grumpy because you didn't leave any of your
> exceptional flying skill in the LS8!
>
> -John

John,

I know what you mean. I bought my current V2b from Tim Welles, and he
took all his skill with him, too! ;-).

Frank

[Todd]

Larger batteries means a change in weight.
Do not forget to update the W&B.
You never know when you will get ramped by some FAA guy who will
notice the non-factory issued battery straps. It can be a very
slippery slope from there

[Andy[_1_]]

On Oct 2, 5:09*pm, Todd > wrote:

> Larger batteries means a change in weight.
> Do not forget to update the W&B.


Well that's an interesting observation. Do you update your basic
weight and balance data when you load water? Is your weight and
balance then invalid when you dump before landing?

My official weight and balance data does not include the batteries
since they are not required equipment. I consider batteries to be
optional/variable as are pilot mass and arm, water ballast mass and
arm, drinking water, and trim disks. All these are calculated on
page 2 of my W/B spreadsheet and do not appear in the weight and
balance data that was submitted for airworthiness inspection and
carried in the cockpit.

Page 2 of my weight and balance spread sheets allows selection of 1,
or 2, or zero batteries. If I change the battery type and mass I
would update the protected battery mass data on that sheet, but no FAA
inspected data would change.

I understand the situation may be different in countries ruled by
EASA.

Andy

[Larry Goddard]

"Frank" > wrote in message
:

> I'm considering the addition of a PowerFlarm and probably a
> transponder (TTG21/22) to my Ventus 2bx, and am wondering if anyone
> has modified the forward and/or aft battery restraints to accommodate
> taller batteries. The restraints in my ship are set up for the
> typical 7-9AH SLA with dimensions 5.94"L x 2.56"W x 3.94"H. The next
> standard size up (literally) has the same length and width dimensions
> but a height of 4.61". There is plenty of room for the additional
> 3/4" or so, but current molded restraint clips won't work.
>
> Does Schemp-Hirth make molded clips/restraints that will fit the
> taller batteries, or am I on my own?
>
> Regards,
>
> Frank (TA)


Hey Frank,

When I bought my 2bx I modified the battery holder to accommodate the
taller batteries. I actually fabbed up a strap just like the factory
one -- only taller. Made it out of a few layers of fiberglass and
re-assembled the unit just like it had been before. Now the taller
batteries slip in easily. Piece of cake.

Larry