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  <xs:element id="rcat_DebtInstrumentConvertiblePremiumPercentageToBePaid" abstract="false" name="DebtInstrumentConvertiblePremiumPercentageToBePaid" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="rcat_DebtInstrumentConvertiblePercentageOfProceedsDue" abstract="false" name="DebtInstrumentConvertiblePercentageOfProceedsDue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="rcat_DebtInstrumentConvertiblePercentageOfNoteDue" abstract="false" name="DebtInstrumentConvertiblePercentageOfNoteDue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="rcat_DebtInstrumentConvertibleRightToPurchaseSecuritiesPercentage" abstract="false" name="DebtInstrumentConvertibleRightToPurchaseSecuritiesPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="rcat_DebtInstrumentConvertibleAmountToBePaidPercentage" abstract="false" name="DebtInstrumentConvertibleAmountToBePaidPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rcat_PercentOfWaivedRightsToPurchaseSecurities" abstract="false" name="PercentOfWaivedRightsToPurchaseSecurities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rcat_PercentOfConversionAmountToBePaidInCash" abstract="false" name="PercentOfConversionAmountToBePaidInCash" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rcat_RedemptionOfNotesPayable" abstract="false" name="RedemptionOfNotesPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rcat_MayRegisteredDirectOfferingMember" abstract="true" name="MayRegisteredDirectOfferingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rcat_CommonStockVotePerShare" abstract="false" name="CommonStockVotePerShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="rcat_SaleOfStockOptionToPurchaseAdditionalSharesPeriod" abstract="false" name="SaleOfStockOptionToPurchaseAdditionalSharesPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="rcat_EquityRollForward" abstract="true" name="EquityRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rcat_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingOfRestrictedStockUnits" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingOfRestrictedStockUnits" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="rcat_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="rcat_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionEquityInstrumentsGrantsInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionEquityInstrumentsGrantsInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="rcat_ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisesInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisesInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="rcat_WeightedAverageRemainingContractualTermInYearsOutstanding" abstract="false" name="WeightedAverageRemainingContractualTermInYearsOutstanding" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="rcat_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingIntrinsicValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingIntrinsicValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rcat_TwoThousandNineteenEquityIncentivePlanMember" abstract="true" name="TwoThousandNineteenEquityIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rcat_TwoThousandTwentyFourOmnibusEquityIncentivePlanMember" abstract="true" name="TwoThousandTwentyFourOmnibusEquityIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
