Losmandy G11 weights for and GSO RC + QHY9

[Manav]

Quick question for astronomers with the above set-up. Are there any special counterweights requirements? I'm worried about the tail heavy RC on the G11 and am wondering what combination of weights should I get?

1. RC 10" CF - 15.7kg
2. QHY9 - 510g
3. Stellervue F80M - 1.2Kg

Weights offered by Losmandy:

7lb
11lb
21lb

Thanks for your help :)

[blink138]

yugant your g11 is rated for 40lb of counterweights plus 60lb of equipment
i personally have a 21lb and 2 11lb counters on my g11 when it is fully loaded........ no problems
see my avatar for what i carry
pat

[multiweb]

I have the 11 and 21 with the rest (rubber coated gym weight plates) sandwiched in between here (https://public.bn1.livefilestore.com/y1pxIhOKCoO-ju1a_4dekZIyDsJUtzjGnTBm_66dR2Al6EE NGdmng53qcPIX0PM82MciEwQs3b7ofBYFMb e8RHikw/C11_HS3.jpg?psid=1). Don't worry about the load. It'll take it. Just balance it right.

[E_ri_k]

I am only using the one 21Lb counterweight with my setup, almost at the bottom of the shaft.
balances beautifully, no problems.
Erik

[multiweb]

You'll find that the guiding gets better if you use heavier weights and keep them as close as possible to the RA axis. Less oscillations and moment of inertia.

[Manav]

After reading Eriks comments I'll get the 21 and 11 combination. Thanks guys!

Marc - Cable management much :p

[E_ri_k]

Thanks for the tip, that does make sense. I haven't had any guiding problems yet. Maybe I'll get an extra weight just incase.
Erik

[mithrandir]

Just to be different, I have a Losmandy 21lb and a Robin Casady (http://www.robincasady.com/Astro/g11.html) 15lb weight and Lsafety to replace the standard safety washer and knob.

[multiweb]

Mate... I used too. But I'm always packing and unpacking so tying up the cable became just another thing I had to do on top of everything else. Now I just let them free. 'Bag of Noodle' style.