LOC Graduator with Econjet?

LOC Graduator with Econjet?

Post by crai.. » Wed, 01 Jul 1998 04:00:00



Can anyone give me their thoughts on launching a LOC Graduator with an
Econojet G35-7?

The kit suggests G40-10 or G80-10 for G-class motors.

Thanks!

Craig

 
 
 

LOC Graduator with Econjet?

Post by Konrad Hambri » Thu, 02 Jul 1998 04:00:00


Quote:

>Can anyone give me their thoughts on launching a LOC Graduator with an
>Econojet G35-7?

>The kit suggests G40-10 or G80-10 for G-class motors.

>Thanks!

Craig --

The G35-7 is quite a ride for the Grad.  

The 7-sec delay is also probably better than the 10-sec delay
for the Grad on G40 or G80.

Here is a summary of the Grad on all the thrust curves I have
for 29 mm motors .

             Barbara's Kozmo Graduator at Ocotillo on a Summer Day

                        DMass          18.00    oz
                        DDiam           2.60    in
                        EDiam           2.94    in
                        CD              0.60    
                        Rail            5.00    ft

                        SiteAlt       460.00    ft
                        SiteTemp       95.00    F
                        SiteBaro       29.43    inHg
                        SiteMach     1154.7     ft/sec
                        SiteRho         1.1271  Kg/m^3

   Motor     Total I  Max (Min) Gs  V-Rod   VMax    Alt  TBurn   TAlt  Delay
   ========= =======  ============  =====  =====  =====  =====  =====  =====
   AT-F20W      65.0   7.5 ( 1.7)    47.7    232    937    3.4    7.8    4.4
   AT-F25W      79.6   6.0 ( 2.3)    42.7    252   1168    3.4    8.8    5.4
   AT-F50T      78.0  12.5 ( 3.4)    62.4    333   1142    1.6    7.9    6.3
   AT-G25W     120.0   4.2 ( 2.7)    32.4    335   1789    5.0   10.8    5.8
   AT-G33JR     98.4   5.0 ( 2.8)    39.9    323   1372    3.3    9.2    5.9
   AT-G35W     104.0  12.0 ( 2.6)    60.3    359   1529    3.4    9.1    5.7
   AT-G40W     114.1   9.4 ( 3.8)    53.7    373   1669    3.0    9.6    6.6
   AT-G64WR    120.0  13.7 ( 5.4)    57.7    453   1646    1.9    9.2    7.3
   AT-G75JR    161.6  10.8 ( 6.5)    56.2    539   2064    2.2   10.1    7.9
   AT-G80T     116.1  21.4 ( 6.0)    79.9    477   1610    1.4    8.7    7.3
   AT-G125     120.8  20.7 ( 8.3)    75.5    546   1651    1.0    8.7    7.7

hth.

-- kjh
--
------------------------------------------------------------

1111 Seacoast Dr.  Unit 41   |  home:   (619) 423-4451     |
Imperial Beach, CA   91932   |                             |

 
 
 

LOC Graduator with Econjet?

Post by Greg Deput » Thu, 02 Jul 1998 04:00:00


Graduators REALLY rock on an H238!  

:)

    It should be fine . I launched mine on a F 20 Econojet with no problem.
    Jeff Davenport


        Can anyone give me their thoughts on launching a LOC Graduator with an
        Econojet G35-7?
        The kit suggests G40-10 or G80-10 for G-class motors.

        Thanks!

        Craig

 
 
 

LOC Graduator with Econjet?

Post by Dave Davi » Thu, 02 Jul 1998 04:00:00


Quote:

> It should be fine . I launched mine on a F 20 Econojet with no
> problem.

> Jeff Davenport


>      Can anyone give me their thoughts on launching a LOC
>      Graduator with an
>      Econojet G35-7?

>      The kit suggests G40-10 or G80-10 for G-class motors.

>      Thanks!

>      Craig

A G35-7 is a really good motor. For a really snappy ride, try a G104-M
reloadable!
 
 
 

LOC Graduator with Econjet?

Post by Jay Sessle » Thu, 02 Jul 1998 04:00:00


I used all of  the kits recomended AT motors and had fantastic
results...The G40 & G80 were just finewith the 10 sec. delay..........NO
PROBLEMS! really nice flight with a T engine

Just don't use 5 min epoxy like I did...........after a few launches it
developes stress cracks along the epoxy filets.....I just re-poxed with
long cure..30min or longer and  trashed my 5min stuff
 Hope this helps...............Jay

It should be fine . I launched mine on a F 20 Econojet with no problem.
Jeff Davenport
Can anyone give me their thoughts on launching a LOC Graduator with an
Econojet G35-7?
The kit suggests G40-10 or G80-10 for G-class motors.
Thanks!
Craig

 
 
 

LOC Graduator with Econjet?

Post by Konrad Hambri » Fri, 03 Jul 1998 04:00:00



Quote:

>I used all of  the kits recomended AT motors and had fantastic
>results...The G40 & G80 were just finewith the 10 sec. delay..........NO
>PROBLEMS! really nice flight with a T engine

<snip>

Jay --

I sure can't argue with your experience.  

hmmm ...

At what altitude is your launch site ?

How much does your Grad weigh ?

The reason I ask is that Barbara has maybe 25-30 flights
( F--H ) on her Grad.  It weighs in at 18 oz ( includes
a longer MMTube, extra CRing and a 3/4 inch T-Nylon Shock
Cord Anchor ).  

A G40-7 is just about perfect for this config while a G40-10
is about 3-sec late ... ??? hmmm ??? ...

-- kjh
--
------------------------------------------------------------

1111 Seacoast Dr.  Unit 41   |  home:   (619) 423-4451     |
Imperial Beach, CA   91932   |                             |