Interesting observation re: Nashville bomb

In the mid 1980s, Cuba began to allow flights from the USA to Cuba via the Bahamas and Mexico. The anti-communist Cubans in South Florida took a dim view of the travel agencies that handled the arrangements. A method to show their displeasure was the near-simultaneous bombings of several of these travel agencies in South Florida. (Same night, indicating coordination and professionalism.)

The method of attack was simple and ingenious. A big plastic commercial-grade trash bin on wheels was placed outside the store-front windows of the targets. Looks innocent enough at night. A simple camping gas bottle was opened at the bottom, a plumber's candle was taped near the top. The lid of the bin kept the candle from blowing out, or the rising gas from blowing away, and the lid hid the candle light from view. But the lid did not totally seal the bin, so the candle would keep burning. The rising gas reaches the lit candle, and BOOM.

These simple gas bombs totally gutted the travel agencies, blowing out their interior walls and ceilings. The businesses on either side were heavily damaged also. (This happened without the greater effect of the gas bomb trash bin being located in a tight alley with walls on either side, that is, no "tamping" effect to amplify the blast wave.)

Now move from Miami 1980s to Nashville 2020 and do some SWAG extrapolation, from an 80 or 100 gallon commercial-size wheeled plastic trash bin, to a pretty big RV. The Nashville bomber/s didn't detonate a propane tank full of liquid propane, he/they just let the bottles fill the entire RV with a thick cloud of gas. The trash bins that totally wrecked the travel agencies contained about a max of 10 cubic feet of gas when they reached the lit candle. What are the dimensions of the interior of an RV like the one in Nashville? Call it 20L X 8W X 6H just for a rough calculation, ignoring the cab area. I come up with 960 cubic feet, call it a thousand with the cab. 10 cubic feet in a trash bin placed outside the windows of the travel agencies totally wrecked wrecked them, ceilings and walls blown out, neighbor businesses heavily damaged. The bin bomb is 10 cubic feet of gas. The RV bomb is a thousand cubic feet of gas.

No crater tells me it's not even ANFO (Ammonium Nitrate/Fuel Oil), which is about 40% as powerful as TNT, depending on variables, which is given an explosive factor of 1.0. (C-4 is 1.4) Even an ANFO bomb would have cratered the street. IMHO this was "just" a pressure bomb. I'm guessing it was simple flammable gas released into a sealed container (the RV with all outlets sealed) and ignited remotely or on a timer.

For sure the feds already know all this. They are probably freaking out because they will not be able to keep it a secret how easy it is to make a rolling gas bomb. The purpose of this bomb might have been "educational," just to show how simple and powerful a mobile gas bomb can be to create and use.

https://bigcountryexpatoriginal.blogspot.com/2020/12/weird-shit-o-meter-at-11.html?showComment=1608996449771#c4033069003034651519