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From: david mccandless <daval@iprimus.com.au>
Subject: Re: [FlyRotary] Re: re-drive question for George
Date: Sat, 18 Jun 2005 07:08:06 +0800
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
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I cannot see the weight going that high, given that a twin installation=20=

weighs, say 320 lbs FWF. So, subtract the following:

1 rotor                         10 lbs
1 rotor hsg                 20
1 ctr hsg                      25
1/2 eshaft est                5
1/2 coolant est              5
  1/2 tension bolts est    5
Total                            70 lbs
This gives 320 - 70 =3D 250 lbs

I plan on using the lightweight Racemate alternator, with  just one=20
shorter belt, this saves about 7 lbs.

Or if you like, the bare rx8 weighs 200 lbs, then a bare single should=20=

weigh 130 lbs. This agrees with Frank St Germain's helicopter engine=20
weight of 135 lbs based on 1/2 a 13b Series 4 engine.

Any thoughts on these numbers? Dave McC (ever the optimist, and hoping=20=

George comes up with the Al end hsg)


On 17/06/2005, at 2:25 PM, George Lendich wrote:

> Rusty,
> By my figuring the one rotor with PSRU will be about 280 to 300 lbs,=20=

> may be a little less if your really stingy - I don't know if I'd be=20
> too stingy with the oil though.
> George ( down under)
>>
>> Hi George,
>> Are you making a lighter drive for your single rotor?=A0 How much do=20=

>> you figure it will weight?
>> =A0
>> Cheers,
>> Rusty
>>
>>
>>

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I cannot see the weight going that high, given that a twin
installation weighs, say 320 lbs FWF. So, subtract the following:


1 rotor                         10 lbs

1 rotor hsg                 20=20

1 ctr hsg                      25=20

1/2 eshaft est                5=20

1/2 coolant est              5=20

 1/2 tension bolts est    5=20

Total                            70 lbs

This gives 320 - 70 =3D 250 lbs


I plan on using the lightweight Racemate alternator, with  just one
shorter belt, this saves about 7 lbs.


Or if you like, the bare rx8 weighs 200 lbs, then a bare single should
weigh 130 lbs. This agrees with Frank St Germain's helicopter engine
weight of 135 lbs based on 1/2 a 13b Series 4 engine.


Any thoughts on these numbers? Dave McC (ever the optimist, and hoping
George comes up with the Al end hsg)

=20


On 17/06/2005, at 2:25 PM, George Lendich wrote:


=
<excerpt><fontfamily><param>Arial</param><smaller>Rusty,</smaller></fontfa=
mily>

<fontfamily><param>Arial</param><smaller>By my figuring the one rotor
with PSRU will be about 280 to 300 lbs, may be a little less if your
really stingy - I don't know if I'd be too stingy with the oil =
though.</smaller></fontfamily>

<fontfamily><param>Arial</param><smaller>George ( down =
under)</smaller></fontfamily>

<excerpt>

<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>Hi
George,</color></fontfamily>

<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>Are
you making a lighter drive for your single rotor?=A0 How much do you
figure it will weight?</color></fontfamily>

=A0

=
<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>Cheers=
,</color></fontfamily>

=
<fontfamily><param>Arial</param><color><param>FFFF,0000,0000</param>Rusty<=
/color></fontfamily>




</excerpt></excerpt>=

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