Combining Wi-Fi and LTE data transmission technologies we can obtain an integrated solution that provides full end-to-end data transmission channel. This article compares goodputs of two LTE routers, which connect multiple WLAN access points (including Wi-Fi access controller) with the remote FTP server. Handover impact on data channel goodput is measured between wireless access points. Experimental data obtained by taking measurements under field conditions using real hardware, which imitates realistic two rank heterogeneous wireless network. The obtained results are very valuable, as they can be used as source data to develop mathematical network models as well as to tune network simulation software. The article also contains a mathematical model, which allows analyzing the impact on the data channel goodput at several competing vehicles which try to gain access to data channel via wireless access points. Experimental data is used in mathematical model. Obtained results supplement previous research and in this case the results show hardware’s impact on channel goodput.