I would makr another stick. My LPP sticks are much smaller than that
and I've used 1/10 inch rubber wound pretty tight. Make sure the
bigger dimension is verticlePerhaps you could also try a new bearing?
On Fri, Jun 12, 2009 at 1:26 PM, lcordes<lcordes_at_juno.com> wrote:
>
>
> Sameer - is it really 1/32" motor ? With a 1/4 x 1/2 inch motor stick
> you should have little trouble with rubber up to at least 1/8". It's
> hard to believe that a 1/32" motor will bend a stick of that mass.
>
> LeRoy Cordes
> AMA 16974
> Chicago, IL
> In God We Trust
>
> On Thu, 11 Jun 2009 19:53:07 -0000 "Sameer Tiwari"
> <deevana_2001_at_yahoo.com> writes:
>> Hi,
>>
>> Thanks LeRoy and Benjamin for the replies...
>>
>> After some more experiments over the last two days, I realized that
>> even though the MS bows, its the prop holder which is bending way
>> more.
>> I am using the Ikara gray plastic prop assembly.
>>
>> I do the back off everytime to get the corrrect torque on my home
>> made torque meter, but the plane still dives :-(
>>
>> The length of MS from prop to hook is 7 inches
>> Rubber is Tan 2, 1/32 - about 16" long, brass ring attaches the
>> rubber to prop.
>> MS is 1/4" X 1/2" grain running lengthwise.
>>
>> Maybe I should make the MS with two sticks and pass the rubber in
>> between?
>>
>> Thanks,
>> Sameer
>>
>>
>> --- In Indoor_Construction_at_yahoogroups.com, Benjamin Saks
>> <bensaks_at_...> wrote:
>> >
>> > It would help to have some key information:
>> >
>> > Length of your motorstick from the prop hanger to the rear hook
>> > The cross sectional area of rubber that you are flying on
>> > The grain orientation of the balsa wood that you have built the
>> motorstick
>> > from
>> > The cross sectional dimensions of the motor stick
>> >
>> > Keep the following in mind:
>> >
>> > The motor stick will bow when loaded with a fully wound motor. You
>> should
>> > expect this to happen and use it to your advantage.
>> > You can build in some slight upthrust to counter-act the down
>> thrust from
>> > the bowing motorstick.
>> > You can also use balsa to make a tension bracing for the top of
>> the MS.
>> > Balsa is strong in tension and does not stretch.
>> >
>> > With more information I think we can help you out.
>> >
>> >
>> >
>> > On Mon, Jun 8, 2009 at 12:25 PM, Sameer Tiwari
>> <deevana_2001_at_...>wrote:
>> >
>> > >
>> > >
>> > > Hi folks,
>> > >
>> > > Having built several of the indoor models over the last year. I
>> kept
>> > > bumping into the issues of a the plane taking a nose dive,
>> whenever I put
>> > > turns in the rubber exceeding a 1000.
>> > >
>> > > I am sure the folks on this forum know what I am talking
>> about...
>> > >
>> > > The fusestick warps/buckles under the stress and causes an
>> unwanted
>> > > upthrust from the prop, causing the plane to nose dive. Once you
>> pick it up
>> > > and let it run a few seconds, it will fly beautifully once again
>> giving
>> > > close to 2 mins of flight time.
>> > >
>> > > But, I want to stretch more to exceed 3mins, and stuck on the
>> fusestick
>> > > design, it has to be balsa - no boron/fiber/tubes etc.
>> > >
>> > > BTW, I did try a box design with two 1/32 X 1/2 for a pair of
>> sides and
>> > > 1/16 X 1/16 for the other, and it was equally weak as a solid
>> 1/4 X 1/2.
>> > >
>> > > Any ideas?
>> > > Thanks
>> > >
>> > >
>> > >
>> >
>> >
>> >
>> > --
>> > BEN SAKS
>> > Project Designer
>> > bsaks_at_...
>> >
>> > WET
>> > 10817 Sherman Way
>> > Sun Valley, CA 91352
>> > T 818.769.6200
>> > F 818.301.6111
>> > www.wetdesign.com
>> >
>>
>>
>>
>>
>> ------------------------------------
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>
> LeRoy Cordes
> AMA 16974
> Chicago, IL
> In God We Trust
> __________________________________________________________
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--
Marty Sasaki
Arlington, MA, USA
http://www.martys-simple-things.com/
marty.sasaki_at_gmail.com
Received on Fri Jun 12 2009 - 11:58:24 CEST