Losmandy G11 weights for and GSO RC + QHY9

[Manav (Yugant)]

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 (Pat)]

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 (Marc)]

I have the 11 and 21 with the rest (rubber coated gym weight plates) sandwiched in between here. Don't worry about the load. It'll take it. Just balance it right.

[E_ri_k (Erik)]

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

[multiweb (Marc)]

Originally Posted by 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

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 (Yugant)]

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

Marc - Cable management much :p

[E_ri_k (Erik)]

Originally Posted by 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.

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 (Andrew)]

Just to be different, I have a Losmandy 21lb and a Robin Casady 15lb weight and Lsafety to replace the standard safety washer and knob.

[multiweb (Marc)]

Originally Posted by Manav

Marc - Cable management much :p

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.