Questions @ a modified LOC IV

Questions @ a modified LOC IV

Post by Art » Sun, 14 May 2000 04:00:00



Well, after months of design and re-design, my LOC IV with payload bay and
camera payload is planning to fly this coming weekend.  If I play my cards
right I'll be tipping the scales, with motor, at just under the 3.3 lb
limit.  Couple of questions...
1. Where is the Cp for this rocket? (I haven't change any of the dimensions
of the stock kit...all mods are internal so I need to know where Cp is).
2. At 3.3 lbs on a 4 foot rail or rod, will either of the econojet G motors
get me up to speed or do I need to go w/ a beefier motor.   (either rms or
single use) I don't have the latest wrasp.eng file to do this calculation.
3. Does anyone have a .eng file so I can update my winrasp?
Thanks,
Art T
NAR# 34201
TRA# 6821
Level I
 
 
 

Questions @ a modified LOC IV

Post by BJames » Mon, 15 May 2000 04:00:00


Quote:
>2. At 3.3 lbs on a 4 foot rail or rod, will either of the econojet G motors
>get me up to speed or do I need to go w/ a beefier motor.   (either rms or
>single use)

I'd recommend G80 single use or G64 RMS.  I don't think the G35 would do it.

 
 
 

Questions @ a modified LOC IV

Post by Kurt Kesl » Tue, 16 May 2000 04:00:00




Quote:
> Well, after months of design and re-design, my LOC IV with payload bay and
> camera payload is planning to fly this coming weekend.  If I play my cards
> right I'll be tipping the scales, with motor, at just under the 3.3 lb
> limit.  Couple of questions...
> 1. Where is the Cp for this rocket? (I haven't change any of the dimensions
> of the stock kit...all mods are internal so I need to know where Cp is).
> 2. At 3.3 lbs on a 4 foot rail or rod, will either of the econojet G motors
> get me up to speed or do I need to go w/ a beefier motor.   (either rms or
> single use) I don't have the latest wrasp.eng file to do this calculation.
> 3. Does anyone have a .eng file so I can update my winrasp?
> Thanks,
> Art T
> NAR# 34201
> TRA# 6821
> Level I

A G35 would be pretty marginal for this.  Go with the G64 RMS or G80 SU.

--
Kurt Kesler
NAR #75633 Level 2 TRA #7603 SOAR #121 GAMMA #494123 TARA

 
 
 

Questions @ a modified LOC IV

Post by Jerry Garci » Tue, 16 May 2000 04:00:00


A G35 would be disastrous in a rocket weighing 3.3 lbs.  I'd suggest
H128 for any kind of altitude.  The Aerotech Mirage at 2 lbs only gets
1000' on a G80, that's if everything is right and I am skeptical of
that even.

As far as CP goes, I don't know.

Jerry Garcia



Quote:
> Well, after months of design and re-design, my LOC IV with payload
bay and
> camera payload is planning to fly this coming weekend.  If I play my
cards
> right I'll be tipping the scales, with motor, at just under the 3.3 lb
> limit.  Couple of questions...
> 1. Where is the Cp for this rocket? (I haven't change any of the
dimensions
> of the stock kit...all mods are internal so I need to know where Cp
is).
> 2. At 3.3 lbs on a 4 foot rail or rod, will either of the econojet G
motors
> get me up to speed or do I need to go w/ a beefier motor.   (either
rms or
> single use) I don't have the latest wrasp.eng file to do this
calculation.
> 3. Does anyone have a .eng file so I can update my winrasp?
> Thanks,
> Art T
> NAR# 34201
> TRA# 6821
> Level I

--
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