EXHIBIT 5.2






                                 October 7, 2005

Capstone Turbine Corporation
21211 Nordhoff Street
Chatsworth, CA 91311

              Re:  Registration Statement on Form S-3 (No. 333-128164)

Ladies and Gentlemen:

         We have acted as counsel to Capstone Turbine Corporation, a Delaware
corporation (the "Company"), in connection with the offering and sale by the
Company of up to 17,000,000 shares of its common stock, par value $0.001 per
share (the "Common Stock") pursuant to a Registration Statement on Form S-3
(Registration Number 333-128164) (the "Registration Statement") under the
Securities Act of 1933, as amended (the "Securities Act"), and a related
prospectus, dated as of September 14, 2005 (the "Prospectus"), and a prospectus
supplement, dated as of October 7, 2005 (the "Prospectus Supplement"). The
Common Stock is to be issued pursuant to Subscription Agreements relating to a
registered direct offering pursuant to which the Company will sell up to
17,000,000 shares of Common Stock to certain investors.

         In connection with this opinion, we have examined and relied upon such
records, documents and other instruments as in our judgment are necessary and
appropriate in order to express the opinions hereinafter set forth and have
assumed the genuineness of all signatures, the authenticity of all documents
submitted to us as originals, and the conformity to original documents of all
documents submitted to us as certified or photostatic copies.

         Based upon the foregoing, we are of the opinion that the Common Stock,
when issued and delivered in the manner and on the terms described in the
Subscription Agreements, will be validly issued, fully paid and non-assessable.

         We hereby consent to the filing of this opinion with the Securities and
Exchange Commission as Exhibit 5.2 to the Registration Statement. We also
consent to the reference to this firm under the caption "Legal Matters" in the
Prospectus and the Prospectus Supplement. This consent is not to be construed as
an admission that we are a party whose consent is required to be filed with the
Registration Statement under the provisions of the Securities Act or the rules
and regulations of the Securities and Exchange Commission promulgated
thereunder.


                                      Very truly yours,

                                      /s/ WALLER LANSDEN DORTCH & DAVIS, PLLC

                                      WALLER LANSDEN DORTCH & DAVIS, PLLC