SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                ______________

                                 SCHEDULE 13G
                                (Rule 13d-102)


          INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO
           RULES 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED
                          PURSUANT TO RULE 13d-2(b)*

                    Innovative Solutions and Support, Inc.
                    --------------------------------------
                               (Name of Issuer)

                                 Common Stock
                                 ------------
                        (Title of Class of Securities)

                                  45769N 10 5
                                  -----------
                                (CUSIP Number)

                               December 31, 2000
                               -----------------
            (Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

  [ ] Rule 13d-1(b)
  [ ] Rule 13d-1(c)
  [X] Rule 13d-1(d)



     *  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 the disclosures provided in a prior cover page.

     The information required in 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 ("Act") 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).


===============================================================================
  CUSIP NO.  45769N 10 5       13G                           Page 2 of 5 Pages
------------------------------------------------------------------------------
      NAMES OF REPORTING PERSONS. Parker-Hannifin Corporation
 1    I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS  34-0451060



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      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                              (a) [_]
                                                (b) [_]

------------------------------------------------------------------------------
      SEC USE ONLY
 3


------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4

      Ohio
------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5
     NUMBER OF
                          1,458,141
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6

     OWNED BY             None
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7
    REPORTING
                          1,458,141
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          None
------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9
      1,458,141
------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10
                                                              [_]

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      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
11

      12.0%
------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
12

      CO
------------------------------------------------------------------------------


                      *SEE INSTRUCTION BEFORE FILLING OUT!

                                      -2-


                                 SCHEDULE 13G

Item 1.

1(a).  Name of ISSUER:  Innovative Solutions and Support, Inc.

1(b).  Address of Issuer's Principal Executive Offices:

          420 Lapp Road, Malvern, Pennsylvania 19355

Item 2.

2(a).  Name of Person Filing:  Parker-Hannifin Corporation

2(b).  Address of Principal Business Office or, if None, Residence:

          6035 Parkland Boulevard, Cleveland, Ohio 44124

2(c).  Citizenship:  Ohio

2(d).  Title of Class of Securities:  Common Stock, $.001 par value

2(e).  CUSIP Number:  45769N 10 5

Item 3.  If This Statement is Filed Pursuant to Rules 13d-1(b), or 13d-2(b) or
         (c), Check Whether the Person Filing is a:

          Not Applicable.

Item 4.  Ownership

     Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1.


  
     (a)  Amount beneficially owned: 1,458,141
     (b)  Percent of class:  12.0%
     (c)  Number of shares as to which such person has:
             (i)  Sole power to vote or to direct the vote: 1,458,141
            (ii)  Shared power to vote or to direct the vote:  None
           (iii)  Sole power to dispose or to direct the disposition of: 1,458,141
            (iv)  Shared power to dispose or to direct the disposition of:  None


                                      -3-


Item 5.  Ownership of Five Percent or Less of a Class
          Not Applicable.

Item 6.  Ownership of More Than Five Percent on Behalf of Another Person

          Not Applicable.

Item 7.  Identification and Classification of the Subsidiary Which Acquired the
         Security Being Reported on By the Parent Holding Company

          Not applicable.

Item 8.  Identification and Classification of Members of the Group

          Not Applicable.

Item 9.  Notice of Dissolution of Group

          Not Applicable.

Item 10. Certifications

          Not Applicable.

                                      -4-


                                   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.


                              February 12, 2001
                              ---------------------------------------------
                                         (Date)

                              PARKER-HANNIFIN CORPORATION

                              /s/ Thomas A. Piraino, Jr.
                              ---------------------------------------------
                                       (Signature)

                              Vice President, General Counsel and Secretary
                              ---------------------------------------------
                                       (Name/Title)

                                      -5-