------------------------------
                                                           OMB  APPROVAL
                                                  ------------------------------
                                                  OMB Number           3235-0145
                                                  Expires:     December 31, 2005
                                                  Estimated  average  burden
                                                  hours  per  response  11
                                                  ------------------------------

                                 UNITED  STATES
                      SECURITIES  AND  EXCHANGE  COMMISSION
                            Washington,  D.C.  20549

                                 SCHEDULE  13D
                   Under  the  Securities  Exchange  Act  of  1934

SpaceDev,  Inc.
--------------------------------------------------------------------------------
                                (Name  of  Issuer)

$0.0001  par  value  common  stock
--------------------------------------------------------------------------------
                         (Title  of  Class  of  Securities)

846241  10  7
--------------------------------------------------------------------------------
                                 (CUSIP  Number)

Richard  B.  Slansky - 13855 Stowe Drive, Poway, California 92064 (858) 375-2030
--------------------------------------------------------------------------------
                 (Name,  Address  and  Telephone  Number  of  Person
               Authorized  to  Receive  Notices  and  Communications)

December 30, 2005
--------------------------------------------------------------------------------
             (Date  of  Event  which  Requires  Filing  of  This  Statement)

   If  the  filing  person  has  previously filed a statement on Schedule 13G to
   report  the  acquisition  that  is  the  subject of this Schedule 13D, and is
   filing  this  schedule  because  of  ss.  240.13d-1(e),  240.13d-1(f)  or
   240.13d-1(g),  check  the  following  box  [_].

   Note:  Schedules  filed  in  paper format shall include a signed original and
   five copies of the schedule, including all exhibits. See ss. 240.13d-7(b) for
   other  parties  to  whom  copies  are  to  be  sent.

   *  The  remainder  of  this  cover  page  shall be filled out for a reporting
   person's  initial  filing  on  this form with respect to the subject class of
   securities,  and  for  any  subsequent amendment containing information which
   would  alter  disclosures  provided  in  a  prior  cover  page.

   The  information  required  on  the remainder of this cover page shall not be
   deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
   Act  of  1934  or otherwise subject to the liabilities of that section of the
   Act but shall be subject to all other provisions of the Act (however, see the
   Notes).

                                      PAGE

CUSIP  No.  84621  10  7


--------------------------------------------------------------------------------
1.   Name  of  Reporting  Persons.
     I.R.S.  Identification  Nos.  of  above  persons  (entities  only).

Richard B. Slansky
--------------------------------------------------------------------------------
2.   Check  the  Appropriate  Box  If  a  Member  of  a Group (See Instructions)
     (a)  [_]
     (b)  [_]
--------------------------------------------------------------------------------
3.   SEC  Use  Only

--------------------------------------------------------------------------------
4.   Source  of  Funds  (See  Instructions)
PF
--------------------------------------------------------------------------------
5.   Check  If  Disclosure  of  Legal  Proceedings  Is  Required  Pursuant  to
     Items  2(d)  or  2(e)                                             [_]

--------------------------------------------------------------------------------
6.   Citizenship  or  Place  of  Organization
USA
--------------------------------------------------------------------------------
               7.   Sole  Voting  Power
  NUMBER  OF         110,723
   SHARES      -----------------------------------------------------------------
BENEFICIALLY   8.   Shared  Voting  Power
 OWNED  BY                  0
    EACH       -----------------------------------------------------------------
  REPORTING    9.   Sole  Dispositive  Power
   PERSON           2,235,723
    WITH       -----------------------------------------------------------------
               10.  Shared  Dispositive  Power
                            0
--------------------------------------------------------------------------------
11.  Aggregate  Amount  Beneficially  Owned  by  Each  Reporting  Person
2,235,723
--------------------------------------------------------------------------------
12.  Check  Box  If  the  Aggregate  Amount  in Row (11) Excludes Certain Shares
     (See  Instructions)                                               [_]
--------------------------------------------------------------------------------
13.  Percent  of  Class  Represented  by  Amount  in  Row  (11)
8.36%
--------------------------------------------------------------------------------
14.  Type  of  Reporting  Person  (See  Instructions)
IN
--------------------------------------------------------------------------------


                                      PAGE

ITEM  1.  SECURITY  AND  ISSUER

SpaceDev,  Inc.  ("SpaceDev")
Common  Stock,  $0.0001  par  value
13855  Stowe  Drive
Poway,  California  92064

ITEM  2.  IDENTITY  AND  BACKGROUND

     (a)  Richard B. Slansky

     (b)  13855  Stowe  Dr.  Poway,  CA.  92064

     (c) President, Chief Financial Officer, Secretary and Director of SpaceDev,
     the  address  for  which  is  set  forth  above.

     (d)  N/A

     (e)  N/A

     (f)  U.S.  Citizen

ITEM  3.  SOURCE  AND  AMOUNT  OF  FUNDS  OR  OTHER  CONSIDERATION

     Mr.  Slansky  has  purchased  with  personal funds 110,723 shares of common
stock  of  SpaceDev.  Of  such shares, he purchased 38,462 shares for $15,000 in
cash  in  a  private  transaction in 2003 with Mr. Skarupa, the Company's former
Vice President of Operations, an additional 38,462 shares for $15,000 in cash by
exercising  warrant rights which were transferred to Mr. Slansky by Mr. Skarupa,
25,000  shares  for $12,750 in cash by exercising options granted to Mr. Slansky
by  SpaceDev  and  other shares acquired in open market transactions through Mr.
Slansky's participation in SpaceDev's employee stock purchase plan. In addition,
Mr.  Slansky  has  vested  options  to  purchase up to an aggregate of 2,125,000
shares  at varying prices. All options that were granted on December 20, 2005 in
connection  with  his  employment  by SpaceDev were vested at time of grant and,
subject  to  certain  limitations, the option may be exercised by means of a net
exercise  provision  by  surrendering  shares  with  a  fair market value of the
exercise  price  upon exercise. All remaining options that Mr. Slansky held that
were  granted  prior to December 20, 2005 and remained un-vested on December 20,
2005  were  also  deemed  vested  due to the Board of Directors accelerating all
un-vested  options.

ITEM  4.  PURPOSE  OF  TRANSACTION

     The  shares  were purchased by Mr. Slansky for investment. Mr. Slansky does
not  have  any current or specific plans or proposals of the type required to be
reported  herein, although he may from time to time be involved in developing or
analyzing  plans  or proposals that could affect SpaceDev in connection with the
services  he  renders  to  SpaceDev  as  a  part  of  his  employment.

ITEM  5.  INTEREST  IN  SECURITIES  OF  THE  ISSUER

     (a) Mr. Slansky is deemed to be the beneficial owner of 2,235,723 shares of
common  stock,  or  8.36%  of  the outstanding shares, including the shares that
would  be  outstanding  if the shares that Mr. Slansky has the right to purchase
were  actually outstanding. Included in this amount are 2,155,000 shares subject
to options granted to Mr. Slansky in connection with his employment by SpaceDev.
Thus,  of  the  shares  as  to  which Mr. Slansky is deemed to be the beneficial
owner,  Mr.  Slansky  has  sole  voting power with respect to 110,723 shares and
shared  voting  power  with  respect  to  0  shares,  and  Mr.  Slansky has sole
dispositive  power  with  respect  to  all  2,235,000  shares.

ITEM 6. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
SECURITIES  OF  THE  ISSUER

Not  applicable.

ITEM  7.  MATERIAL  TO  BE  FILED  AS  EXHIBITS

None.

                                      PAGE


                                    SIGNATURE

After  reasonable  inquiry and to the best of my knowledge and belief, I certify
that  the information set forth in this statement is true, complete and correct.

                                                               December 30, 2005
                                                              ------------------
                                                                            Date

                                                         /s/  Richard B. Slansky
                                                   -----------------------------
                                                              Richard B. Slansky
                                             President & Chief Financial Officer
                                             -----------------------------------
                                                                      Name/Title


ATTENTION:  INTENTIONAL  MISSTATEMENTS  OR  OMISSIONS OF FACT CONSTITUTE FEDERAL
CRIMINAL  VIOLATIONS  (SEE  18  U.S.C.  1001)